JP4259504B2 - The camera module - Google Patents

Description

  The present invention relates to a camera module, and more particularly to a camera module that can be used in a small electronic device with a camera such as a digital camera or a mobile phone with a camera.

  Small camera modules are used in small electronic devices with cameras such as digital cameras and camera-equipped mobile phones. Such a camera module has a lens and an image sensor such as a CCD image sensor or a CMOS image sensor. In recent years, there has been a demand for further miniaturization and thinning of such a small electronic device with a camera. Accordingly, there is a demand for miniaturization and thinning of a camera module in which a lens and an image sensor used in these small electronic devices with a camera are integrated.

  As a structure of a conventional camera module, a structure shown in FIG. 7 has been proposed. The camera module 100 shown in FIG. 7 includes a substrate 120 having an image sensor 110, a base 130 provided on the substrate 120 so as to seal the image sensor 110, and an upper plate portion 131 (see FIG. 8) of the base 130. And a lens unit 170 having a plurality of lenses 180 and 181 screwed into the holder 160.

  When the camera module 100 is assembled in a small electronic device with a camera, as shown in FIG. 8, the four corners to which the holder 160 of the upper plate portion 131 of the base 130 is not bonded are held by holding members (not shown). Used as part 132.

  In such a camera module 100, when the holder 160 is bonded to the upper plate portion 131 of the base 130 with an adhesive, the light of the lenses 180 and 181 of the lens unit 170 is centered on the image sensor 110 sealed in the base 130. In order to align the axes, the position of the holder 160 relative to the base 130 is adjusted. This adjustment is performed while finely moving the position of the holder 160 on the upper plate portion 131 in a state where an adhesive is applied to a predetermined position of the upper plate portion 131 of the base 130. Therefore, in such an adjustment process, there is a possibility that the adhesive may protrude from the pressed portion 132 of the upper plate portion 131 of the base 130. If the adhesive that protrudes onto the pressed portion 132 adheres to the pressed portion 132 and is cured, the pressed portion 132 cannot be accurately held by the holding member, and the camera module 100 is mounted with a small electronic device with a camera. There arises a problem that the device cannot be assembled correctly.

  Further, in such a camera module 100, a flexible printed circuit board (not shown) is connected to the board 120 of the camera module 100 in order to connect to a control circuit provided in a small electronic device with a camera. When connecting such a flexible printed circuit board to the board 120, an anisotropic conductive film (not shown) is inserted between the flexible printed circuit board and the board 120 including the base 130, and the flexible printed circuit board and Pressure is applied from both sides of the base 130 using a jig. At the same time, heat is applied to the anisotropic conductive film side through the flexible printed circuit board. In this way, the flexible printed circuit board is connected to the board 120 of the camera module 100.

  In such a camera module 100, a protrusion such as a wall is formed on the upper plate portion 131 of the base 130 so as to surround the pressed portion 132 in order to prevent the adhesive from protruding into the pressed portion 132. A method is conceivable. However, when such a protruding portion is formed on the upper plate portion 131 of the base 130, a step portion is formed on the upper plate portion 131. By forming such a step, the area of a portion that can be used for applying pressure by a jig on the upper plate portion 131 when the flexible printed circuit board is connected to the substrate 120 is reduced. As a result, when the flexible printed circuit board is connected to the substrate 120, sufficient pressure cannot be applied to the base 130, and the flexible printed circuit board cannot be reliably connected to the substrate 120.

  Further, in order to prevent the adhesive from protruding to the pressed portion 132, it is conceivable that the area of the lower end portion of the holder 160 relative to the area of the upper plate portion 131 of the base 130 is made relatively small. However, since the size of the upper plate portion 131 of the base 130 is limited due to a request for miniaturization of the camera module, the upper plate portion 131 of the base 130 cannot be enlarged. Therefore, in such a method, there is no choice but to make the lower end portion of the holder 160 smaller than the upper plate portion 131 of the base 130. However, by reducing the lower end portion of the holder 160, the bonding area of the lower end portion of the holder 160 for bonding to the upper plate portion 131 is reduced, and the adhesive strength between the holder 160 and the base 130 cannot be sufficiently obtained. End up. As a result, there arises a problem that the impact resistance of the camera module 100 is deteriorated.

  The present invention has been made in view of these problems, and an object thereof is to provide a camera module that can prevent an adhesive from protruding to a pressed portion when a holder is bonded to an upper plate portion of a base. It is in.

In order to achieve the above object, a camera module of the present invention includes a substrate having an image sensor, a base provided on the substrate so as to seal the image sensor, and having a substantially rectangular upper plate portion, In a camera module having a holder fixed to the upper plate portion of the base via an adhesive, and a lens unit attached to the holder, the base is at four corners of the upper plate portion of the base, Each has a pressed portion that is held by a holding member when the camera module is attached to a small electronic device with a camera, and the upper plate portion of the base has the base when the holder is fixed to the base. A protruding preventing means for preventing the adhesive from protruding from the pressed portion is provided .

  In the camera module of the present invention, the protrusion prevention means includes a corner step portion used as the pressed portion, and the corner step portion avoids an area where the holder of the upper plate portion is bonded. As described above, it is preferable that the base is formed at each corner of the upper plate portion.

  Further, in the camera module of the present invention, the protrusion preventing means further includes a plurality of grooves for receiving the adhesive that protrudes out of a region where the holder of the upper plate portion is bonded, It is preferable that the upper plate portion of the base is formed so as to avoid a corner step portion and a region where the holder of the upper plate portion is bonded.

  In the camera module of the present invention, it is preferable that the groove includes a first groove formed so as to surround the corner step portion.

  In the camera module of the present invention, it is preferable that the first groove has a substantially L shape.

  In the camera module of the present invention, the groove includes at least one second groove, and the second groove has a linear shape, and is between the adjacent angular step portions. It is preferable that it is formed along the outer edge of the upper plate portion of the base.

According to the camera module of the first aspect, the upper plate portion of the base is provided with the protrusion preventing means for preventing the adhesive from protruding around the holder when the holder is fixed to the base. By preventing the adhesive from protruding around the holder, the sticking prevention means prevents the adhesive from adhering to an undesired part of the camera module and prevents the camera module from being accurately attached to a small electronic device with a camera. Can be prevented.
More specifically, in this camera module, the base has a pressed portion that is held by a holding member at each of the four corners of the upper plate portion of the base when the camera module is attached to a small electronic device with a camera. In addition, the upper plate portion of the base is provided with the protrusion preventing means for preventing the adhesive from protruding to the pressed portion of the base when the holder is fixed to the base. Such a protrusion preventing means can prevent a situation in which the adhesive adheres to the pressed portion and the camera module cannot be accurately attached to the small electronic device with a camera.

According to the camera module of the second aspect , the protrusion preventing means includes a corner step portion used as the pressed portion, and the corner step portion avoids an area where the holder of the upper plate portion is bonded. And are formed at the corners of the upper plate portion of the base. Due to the step of each corner step, a sufficient surface tension acts on the adhesive on the upper plate portion of the base, and the adhesive can be prevented from protruding from the upper plate portion to the corner step portion.

According to the camera module of claim 3 , the protrusion preventing means further includes a plurality of grooves for receiving an adhesive that protrudes outside a region where the holder of the upper plate portion is bonded, and the grooves include a corner step portion. And the upper plate portion of the base so as to avoid the region where the holder of the upper plate portion is bonded. As a result, it is possible to more reliably prevent the adhesive from protruding to the corner step portion without reducing the bonding area between the base and the holder.

According to the camera module of the fourth aspect , the groove includes a first groove formed so as to surround the corner step portion. The adhesive that protrudes from the predetermined application region flows into the first groove, so that the adhesive can be reliably prevented from protruding to the corner step portion.

According to the camera module of the fifth aspect , since the first groove has a substantially L-shaped shape, the first groove more reliably prevents the adhesive from protruding to the corner step portion. it can.

The camera module according to claim 6 includes at least one second groove, and the second groove has a linear shape, and the upper plate of the base between the adjacent corner steps. It is formed along the outer edge of the part. The adhesive that protrudes from the predetermined application region flows into the second groove, thereby preventing the adhesive from protruding to the side surface of the base. In such a camera module, a space in which the camera module in a small electronic device with a camera is attached is limited. Therefore, the adhesive that adheres to the side surface of the base beyond the outer edge of the upper plate portion of the base affects the mounting accuracy of the camera module. Therefore, forming the second groove is effective to avoid such an undesirable state.

  The above-described and other configurations, operations, and effects of the present invention will become more apparent from the following description of preferred embodiments with reference to the drawings.

  Hereinafter, the camera module of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

  FIG. 1 is a perspective view showing an appearance of a camera module according to the first embodiment of the present invention. FIG. 2 is an exploded cross-sectional view of the camera module shown in FIG.

  As shown in FIGS. 1 and 2, the camera module 1 according to the first embodiment of the present invention is provided with a substrate 20 having an image sensor 10; and the image sensor 10 is hermetically sealed on the substrate 20. A base 30 having an upper plate portion 31 in shape; a holder 60 fixed to the upper plate portion 31 of the base 30 with an adhesive; a lens unit 70 screwed into the holder 60 and having lenses 80 and 81; It is composed of

  Hereinafter, details of each component will be described. In the present specification, the terms “upper” and “lower” are used as appropriate, but in the description of each member, the direction of the arrow shown in FIG. 1 is the upward direction, and the direction opposite to the arrow is the downward direction.

  The image sensor 10 is attached to the center of the substrate 20. For example, a CMOS image sensor or a CCD image sensor is used as the image sensor 10. Furthermore, a plurality of electronic components 11 such as capacitors are mounted on the substrate 20 at predetermined intervals on both sides of the image sensor 10. In a state where the camera module 1 is assembled, the imaging device 10 and the electronic component 11 are housed in a sealed space formed by the substrate 20, the base 30, and a cut filter 50 described later.

  The base 30 provided on the substrate 20 is made of synthetic resin. As shown in FIG. 3, a substantially circular plane portion 39 is formed at a position lower than the upper plate portion 31 at the center of the upper plate portion 31. A substantially rectangular positioning portion 37 for accommodating the cut filter 50 (see FIG. 2) that does not transmit far-infrared rays in a positioned state is formed inside the substantially circular plane portion 39. The positioning part 37 has an adhesive application surface for adhering the cut filter 50 to the base 30. Further, around the positioning portion 37, four semicircular adhesive injection portions 38 that also serve as relief shapes for the needle (injection needle) to enter when applying the adhesive with a dispenser or the like are provided. . A substantially rectangular opening 36 for introducing light into the image sensor 10 is formed at the center of the positioning portion 37.

  Four corner step portions 32 are formed at the four corners of the upper plate portion 31 of the base 30 so as to avoid the portion where the holder 60 is bonded. These square step portions 32 serve as pressed portions for holding members (not shown) when the camera module 1 is assembled to a small electronic device with a camera. These angular step portions 32 are arranged around the holder 60 when the position of the holder 60 is finely moved on the upper plate portion 31 in order to make the optical axes of the lenses 80 and 81 coincide with the center of the image sensor 10. It serves as a preventive means for preventing the adhesive from protruding in an unfavorable place.

  Further, in the vicinity of one corner of the upper plate portion 31 of the base 30, a recess 31a is formed as a mark for arranging and assembling the base 30 in an appropriate direction.

  As shown in FIGS. 2 and 3, the base 30 has a peripheral wall portion 35 formed integrally with the upper plate portion 31 along the outer edge of the upper plate portion 31. The peripheral wall portion 35 includes four wall portions 35a provided along respective outer edges of the upper plate portion 31, and four corner posts 35b provided at corners of the adjacent wall portions 35a. Each corner post 35b extends downward beyond the lower end of the wall 35a. These corner posts 35 b are fitted with recesses 20 a (see FIG. 2) formed at four corners of the substrate 20 in order to position the base 30 with respect to the substrate 20 when the base 30 is assembled to the substrate 20. Configured to match. At that time, the base 30 applies an adhesive to the lower end portion of the wall portion 35 a of the peripheral wall portion 35 and adheres the lower surface of the wall portion 35 a to the upper surface of the substrate 20 in this state.

  The holder 60 is made of synthetic resin, and is fixed to the upper surface of the upper plate portion 31 of the base 30 with an adhesive. As shown in FIGS. 2 and 4, the holder 60 includes a cylindrical tubular portion 61 and a substantially square-shaped flange portion 62 integrally provided at the lower part of the outer periphery of the tubular portion 61. Yes.

  On the inner periphery of the cylindrical portion 61 of the holder 60, a screw groove 63 is formed for screwing with a screw groove 71 formed on the outer peripheral surface of the lens unit 70. Thereby, the lens unit 70 can be screwed onto the cylindrical portion 61 of the holder 60.

  As shown in FIG. 4, the four corner portions of the flange portion 62 of the holder 60 each have a recessed shape. With such a shape of the flange portion 62, as shown in FIG. 1, when the holder 60 is assembled to the base 30, a space is formed in the upper portion of each corner step portion 32 of the base 30.

  As shown in FIG. 2, the holder 60 is bonded to the upper surface of the upper plate portion 31 of the base 30 with an adhesive via the bottom surface 64 of the cylindrical portion 61. When the holder 60 is bonded to the upper surface of the upper plate portion 31 of the base 30, an adhesive is applied in advance to a predetermined region of the upper plate portion 31 corresponding to the shape of the bottom surface 64 of the cylindrical portion 61 of the holder 60. As described above with reference to the conventional camera module, the position of the holder 60 with respect to the base 30 in order to align the optical axes of the lenses 80 and 81 of the lens unit 70 with the center of the imaging device 10 sealed in the base 30. Is adjusted. This adjustment is performed while finely moving the position of the holder 60 on the upper plate portion 31 of the base 30 in a state where the adhesive is present between the holder 60 and the upper plate portion 31 of the base 30.

  When the holder 60 is bonded to the upper surface of the upper plate portion 31, a minute space is formed between the bottom surface 65 of the flange portion 62 and the upper surface of the upper plate portion 31 of the base 30. Furthermore, by forming the corner step portion 32, a step is formed at each of the four corner portions of the upper plate portion 31. As a result, the surface tension that prevents the adhesive existing in the minute space from protruding in the direction of the corner step portion 32 acts. This surface tension can prevent the adhesive from protruding between the bottom surface 65 of the flange portion 62 and the top surface of the upper plate portion 31 and flowing into the corner step portion 32. Therefore, when the holder 60 is bonded to the upper plate portion 31 of the base 30 while adjusting the optical axes of the lenses 80 and 81 so as to coincide with the center of the image pickup device 10, these angular step portions 32 are arranged on the holder 60. It functions as a protrusion prevention means for preventing the adhesive from protruding around.

  That is, according to the camera module 1 of the first embodiment having the base 30 described above, when the holder 60 is bonded onto the upper plate portion 31 of the base 30, the adhesive is applied to the corner step portion 32 as the pressed portion. It can be prevented from protruding.

  The camera module 1 according to the second embodiment of the present invention will be described below. The feature of the camera module 1 of the second embodiment is the structure of the base 40 that is configured to more reliably prevent the adhesive from protruding from the corner step portion 32. Therefore, in the following description, emphasis is placed on the description of the structure of the base 40, and the description of the same components as the first embodiment such as the substrate 20, the holder 60, and the lens unit 70 is omitted. Moreover, the same component is demonstrated using the same code | symbol.

  The base 40 is made of a synthetic resin. As shown in FIG. 5, the base 40 has a substantially circular plane portion at a position lower than the upper surface of the upper plate portion 41 at the center of the upper plate portion 41 of the base 40, similarly to the base 30 of the first embodiment. 49 is formed. Further, a substantially rectangular positioning portion 47 for accommodating the cut filter 50 (see FIG. 2) that does not transmit far-infrared in a positioned state is formed inside the substantially circular flat portion 49. The positioning portion 47 has an adhesive application surface for bonding the cut filter 50 to the base 40. Also, around the positioning portion 47, four semicircular adhesive injection portions 48 that also serve as relief shapes for needles (injection needles) to enter when applying an adhesive with a dispenser or the like are provided. . In addition, a substantially rectangular opening 46 for introducing light into the image sensor 10 is formed at the center of the positioning portion 47.

  Four corner step portions 42 are formed at four corners of the substantially rectangular upper plate portion 41 of the base 40 so as to avoid a portion where the holder 60 is bonded to the upper plate portion 41 of the base 40. Yes. The corner step portion 42 serves as a pressed portion for the holding member when the camera module 1 is assembled to a small electronic device with a camera.

  Further, in the vicinity of one corner of the upper plate portion 41 of the base 40, a concave portion 41a is formed as a mark for arranging the base 40 in an appropriate direction and assembling.

  As shown in FIGS. 2 and 5, the base 40 has a peripheral wall portion 45 formed integrally with the upper plate portion 41 along the outer edge of the upper plate portion 41. The peripheral wall portion 45 includes four wall portions 45a provided along the respective outer edges of the upper plate portion 41, and four corner posts 45b provided at corners of the adjacent wall portions 45a. Each corner post 45b extends downward beyond the lower end of the wall 45a. These corner posts 45b are fitted with recesses 20a (see FIG. 2) formed at four corners of the substrate 20 in order to position the base 30 with respect to the substrate 20 when the base 40 is assembled to the substrate 20. Configured to match. At that time, the base 40 applies an adhesive to the lower end portion of the wall portion 45 a of the peripheral wall portion 45, and adheres the lower surface of the wall portion 45 a to the upper surface of the substrate 20 in this state.

  In the base 40 of the second embodiment, a plurality of grooves are formed in order to prevent the adhesive from protruding to an unfavorable place such as the corner step portion 42. These grooves are provided on the upper plate portion 41 so as to avoid the region of the upper plate portion 41 to which the corner step portion 42 and the holder 60 are bonded.

  These grooves include a first groove 55 and a second groove 56. The first groove 55 has a substantially L-shape, and is formed between each corner step portion 42 and the substantially circular flat portion 49 so as to surround each corner step portion 42.

  As described above in the description of the first embodiment, in order to make the optical axes of the lenses 80 and 81 coincide with the center of the image pickup device 10, an adhesive is applied to a predetermined position of the upper plate portion 41 of the base 40. The position of the holder 60 with respect to the base 40 is adjusted while finely moving the position of the holder 60 on the upper plate portion 41. In this case, the applied adhesive may protrude from the predetermined region, but the protruded adhesive flows into the first groove 55. Thereby, it is possible to prevent the adhesive from protruding into the corner step portion 42 of the upper plate portion 41 of the base 40.

  The second grooves 56 have a linear shape, and are formed along the outer edge of the upper plate portion 41 of the base 40 between the adjacent corner step portions 42. In the present embodiment, the second groove 56 is formed at three locations on the upper plate portion 41. These second grooves 56 are provided to prevent the adhesive from protruding to the side surface of the base 40.

  In a small electronic device with a camera, generally, a space in which the camera module 1 is attached is considerably limited. For this reason, the adhesive that protrudes beyond the outer edge of the upper plate portion 41 of the base 40 and adheres to the side surface of the base 40 affects the mounting accuracy of the camera module 1. Therefore, forming the second groove 56 is effective to avoid such an undesirable state.

  In the base 40 of the second embodiment, since the first groove 55 and the second groove 56 are formed on the upper plate portion 41 of the base 40, compared to the base 30 of the first embodiment. Thus, when the holder 60 is bonded to the base 40, it is possible to more reliably prevent the adhesive from protruding from the side surfaces of the corner step portion 42 and the base 40 used as the pressed portion.

  In the second embodiment, the number and the shape of the first groove 55 and the second groove 56 are not limited to the number and the shape described above and illustrated, and may be appropriately set as required. Changes may be made.

  Hereinafter, an example of a procedure for assembling the camera module 1 according to the present invention will be described based on an example using the base 40 of the second embodiment.

[1] First, the lenses 80 and 81 are attached to the lens unit 70.
[2] Next, the lens unit 70 to which the lenses 80 and 81 are attached is screwed into the holder 60.
[3] Next, the base 40 is fixed with an adhesive on the substrate 20 to which the image sensor 10 and the plurality of electronic components 11 are attached.
[4] Next, the assembly in which the cut filter 50 is assembled in step [3] is placed on the positioning portion 47 of the base 40 and fixed with an adhesive. Thereby, the image pick-up element 10 and the some electronic component 11 can be sealed in sealed space.
[5] Next, a flexible printed circuit board (not shown), an anisotropic conductive film (not shown), and the board 20 are arranged in this order from the bottom. Next, pressure is applied from above and below the base 40 and the flexible printed circuit board on the substrate 20. At the same time, heat is applied to the anisotropic conductive film side through the flexible printed circuit board. In this way, the flexible printed circuit board is connected to the board 20.
[6] Next, an adhesive is applied to a predetermined position of the upper plate portion 41 of the base 40 of the assembly assembled in step [5].
[7] Next, by finely moving the position of the holder 60 prepared in step [2] on the upper surface of the upper plate portion 41 of the base 40, the optical axes of the lenses 80 and 81 and the center of the image sensor 10 are Adjust the position. In this adjustment step, even if the adhesive protrudes from the space between the holder 60 and the upper plate portion 41 toward the corner step portion 42, such an adhesive flows into the first groove 55. Thereby, it is possible to prevent the adhesive from protruding into the corner step portion 42. Further, the adhesive that protrudes in the direction of the side surface of the base 40 from between the holder 60 and the upper plate portion 41 in this way flows into the second groove 56. Thereby, it is possible to prevent the adhesive from protruding to the side surface of the base 40.
[8] Next, the assembly assembled in step [7] is irradiated with a UV spot to temporarily cure the adhesive.
[9] Next, the adhesive of the assembly assembled in step [8] is fully cured in an oven.
[10] Finally, after adjusting the screwing amount of the lens unit 70 and adjusting the focus of the lenses 80 and 81, the lens unit 70 and the holder 60 are fixed with an adhesive.

  The camera module 1 assembled in the above procedure has a size of, for example, 6 mm in length, 6 mm in width, and 4.5 mm in height, but the camera module of the present invention has such a size. It is not limited to.

  The camera module 1 of the above embodiment has a configuration in which the lens unit 70 is screwed directly to the holder 60, but the present invention is not limited to this, and is fixed to the base and the base with an adhesive. For example, the present invention may be applied to a camera module having a zoom mechanism, an autofocus mechanism, or the like as long as it has a holder.

  Finally, the invention is not limited to the embodiments described above, and many improvements and modifications may be made without departing from the scope of the claims set forth below.

It is a perspective view which shows the external appearance of embodiment of the camera module which concerns on this invention. FIG. 2 is an exploded sectional view of the camera module shown in FIG. 1. It is a perspective view of the base of 1st Embodiment of the camera module which concerns on this invention. It is a perspective view of the holder of the camera module shown in FIG. It is a perspective view of the base of 2nd Embodiment of the camera module which concerns on this invention. It is sectional drawing in the AA of the assembly of the base and holder in FIG. It is sectional drawing of the conventional camera module. It is a perspective view of the base of the conventional camera module.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Camera module 10 Image pick-up element 11 Electronic component 20 Board | substrate 20a Recess 30 Base 31 Upper plate part 31a Recess 32 Corner step part 35 Peripheral wall part 35a Wall part 35b Corner post 36 Opening 37 Positioning part 38 Adhesive injection part 39 Plane part 40 Base 41 Upper plate portion 41a Concave portion 42 Corner step portion 45 Peripheral wall portion 45a Wall portion 45b Corner post 46 Opening 47 Positioning portion 48 Adhesive injection portion 49 Flat portion 50 Cut filter 55 First groove 56 Second groove 60 Holder 61 Cylindrical portion 62 Flange portion 63 Screw groove 64 Bottom surface of cylindrical portion 65 Bottom surface of flange portion 70 Lens unit 71 Screw groove 80, 81 Lens 100 Camera module 110 Imaging element 120 Substrate 130 Base 131 Upper plate portion 132 Pressed portion 160 Holder 170 Lens unit 180, 181 lenses

Claims (6)

A substrate having an image sensor;
A base provided to seal the image sensor on the substrate, and having a substantially rectangular upper plate part;
A holder fixed to the upper plate portion of the base via an adhesive;
In a camera module having a lens unit attached to the holder,
The base has a pressed portion held by a holding member at each of the four corners of the upper plate portion of the base when the camera module is attached to a small electronic device with a camera,
The upper plate of the base, a camera, characterized in that the preventing means protruding prevents the the adhesive protrudes to the object holding portion of the base when fixing the holder to the base is provided with module. The protrusion preventing means includes a corner step portion used as the pressed portion, and the corner step portion avoids a region where the holder of the upper plate portion is bonded. The camera module according to claim 1 , wherein the camera module is formed at each corner of the unit. The protrusion preventing means further includes a plurality of grooves for receiving the adhesive that protrudes outside a region of the upper plate portion to which the holder is bonded, and the grooves are formed on the corner step portion and the upper plate portion. The camera module according to claim 2 , wherein the camera module is formed on an upper plate portion of the base so as to avoid an area where the holder is bonded. The camera module according to claim 3 , wherein the groove includes a first groove formed so as to surround the corner step portion. The camera module according to claim 4 , wherein the first groove has a substantially L shape. The groove includes at least one second groove, and the second groove has a linear shape, and is provided at an outer edge of the upper plate portion of the base between the adjacent corner step portions. The camera module according to claim 3 , wherein the camera module is formed along.

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