JP3969181B2 - Electric circuit device and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric circuit device configured by mounting an electric circuit on a printed circuit board and employed in various electronic devices, and a manufacturing method thereof.
[0002]
[Prior art]
For example, an internal combustion engine ignition device is provided with an electric circuit device for controlling the discharge of an ignition plug, and this electric circuit device is usually an electric circuit composed of circuit components such as semiconductor elements and electric wiring. The circuit is composed of a circuit board and a printed board on which the electric circuit is mounted.
[0003]
In order to have versatility, several types of standardized sizes are prepared for the printed circuit board used here, and an optimal size is selected and adopted. On the other hand, electrical circuits mounted on printed circuit boards vary in size depending on the type and number of circuit components to be combined, but are usually made as compact as possible so as to reduce the mounting space on the printed circuit boards. is there.
[0004]
For this reason, the electric circuit mounting space may be considerably smaller than the size of the printed circuit board to be selectively employed. In this case, a partition groove that divides the area where the electric circuit is mounted is formed in the printed circuit board, and the printed circuit board is divided along the partition groove to remove an excess portion, thereby minimizing the printed circuit board. The limit is set to a predetermined size.
[0005]
When a mounting space for a plurality of electrical circuits can be secured on a single printed circuit board, a partition groove for partitioning the area where each electrical circuit is mounted is formed on the printed circuit board, and along the partition groove By dividing the printed circuit board, a plurality of electric circuit devices are produced from one printed circuit board.
[0006]
In the case of manufacturing such an electric circuit device, usually, an electric circuit is mounted after forming a partition groove on the printed circuit board, and the printed circuit board is divided along the partition groove as a final product. The electric circuit device is completed.
[0007]
[Problems to be solved by the invention]
By the way, when dividing one printed circuit board into a plurality of pieces as described above, it is possible to divide the printed circuit board into a predetermined shape by forming a partition groove in advance in a portion to be divided. . However, since the inspection of whether or not the partition groove is normally formed is usually performed by visual observation, there is a case where a formation failure of the partition groove may be missed. In such a case, since the printed circuit board is not divided into a predetermined shape along the partition groove, it becomes a defective product and there is a problem in that productivity is reduced.
[0008]
The present invention has been made in view of the above problems, and an electric circuit device capable of easily and surely detecting a formation defect of a partition groove and improving productivity, and such an electric circuit device. An object of the present invention is to provide a method for manufacturing a circuit device.
[0009]
[Means for solving the problems, actions and effects of the invention]
In the electric circuit device according to the first aspect of the present invention for solving the above-described problem, a plurality of partition grooves extending in the vertical direction and the lateral direction are formed to partition a plurality of areas in which the electric circuit is mounted, and each partition groove is formed. along the electric circuit device having a printed circuit board which is divided into a plurality, and the check lands for detecting a current provided one by one to each said area of said printed circuit board, each of said both sides of each of said partitioning groove is connected to all of the check lands by Rukoto disposed so as both ends are connected to each of said check lands provided in the area across each said compartment groove, and a conductor to be cut by the formation of each of the partitioning groove The means of having is adopted.
[0010]
In the electric circuit device of the present invention, before the printed circuit board is divided, the formation failure of the partition groove is detected by detecting the presence or absence of energization with a pair of check lands provided in areas located on both sides of the partition groove. Can be easily and reliably detected. That is, if the partition groove is formed normally, the conductor is cut by the formation of the partition groove, so that energization at the check land is not detected. On the other hand, when the partition groove is not normally formed, the conductor is not cut, so that energization at the check land is detected. Thereby, before the printed circuit board is divided, it is possible to detect those in which the partition grooves are not normally formed. Therefore, the defective product generated when the printed circuit board is not divided into a predetermined shape along the partition grooves. Reduce and improve productivity.
[0011]
Therefore, according to the electric circuit device of the present invention, it is possible to easily and reliably detect the formation failure of the partition groove, and to improve productivity. Further, in the present invention, since one check land is provided for each area partitioned by the partition groove, even when a certain area is partitioned by a plurality of partition grooves, By combining the check lands provided in the area and the plurality of check lands provided in a plurality of other areas, the number of check lands can be minimized. Thereby, the operation | work which detects the presence or absence of electricity supply between the check lands which make a pair can be performed easily in a short time.
[0012]
In the present invention, checking the land is disposed one by one at an arbitrary position of each area partitioned by partition grooves. That is, even when a certain one of the area is defined by a plurality of partition grooves, Runode have one check lands are provided in the area, a plurality of check lands provided on a plurality of areas adjacent to the area and its one check lands and the Ru can be connected by a conductor, respectively.
[0013]
Since the conductor in the present invention is provided so that both ends thereof are connected to check lands provided in areas located on both sides of the partition groove, the conductor is disposed so as to cross the partition groove. In order to ensure that the conductor is cut when the partition groove is formed, it is preferable that the conductor be provided at a position closer to the surface of the surface on which the partition groove is formed on the printed circuit board. It is a shallower position. This conductor can be formed integrally with Checkland using a highly conductive material such as copper. The conductor and the check land can also be formed by using electric wiring of an electric circuit mounted on a printed board. The conductor and the check land can be directly formed so as to be exposed on the surface of the printed board, and the conductor may be covered with an insulating film or the like so that the surface is not exposed.
[0014]
In order to facilitate the division of the printed circuit board, the partition groove in the present invention is usually formed to face both surfaces of the printed circuit board, but should be formed only on one surface of the printed circuit board. Also good. In this case, the printed circuit board can be easily divided by forming deeper partition grooves. The partition groove is formed after the conductor and the check land are formed, but may be before or after mounting the electric circuit on the printed board.
[0017]
Method of manufacturing an electrical circuit device according to the invention of claim 2 has a plurality of compartments grooves extending a plurality of electrical circuits are mounted area in the vertical and horizontal directions for partitioning is formed, along each compartment groove in the manufacturing method of the electric circuit device having a printed circuit board which is divided into a plurality Te, respectively to form a one by one check lands on each of said areas to be defined by each of said partition groove of said printed circuit board, each of said compartments an inspection unit forming step of forming the sides of the conductors connected to all of the check land by Rukoto both ends are connected to each of said check lands provided in each of said areas of the groove, so as to cut the respective said conductor a partition groove forming step of forming each said partition grooves Te, each of said compartments by each said conductor to detect the presence or absence of energization between the check lands paired are connected It employs a means of having, an inspection step of inspecting a formation.
[0018]
In the manufacturing method of the electric circuit device of the present invention, in the inspection process, the formation of the partition groove is inspected by detecting the presence or absence of energization between the paired check lands. It becomes possible to detect easily and reliably. Thereby, before the printed circuit board is divided, it is possible to detect those in which the partition grooves are not normally formed. Therefore, the defective product generated when the printed circuit board is not divided into a predetermined shape along the partition grooves. Reduce and improve productivity.
[0019]
Therefore, according to the manufacturing method of the electric circuit device of the present invention, it is possible to easily and reliably detect defects formation of partitioning groove, it is possible to improve the productivity.
[0020]
In the manufacturing method of the present invention, the check land and conductor formed in the inspection portion forming step, and the dividing groove formed in the dividing groove forming step are formed in accordance with the invention of claim 1. Can do. Moreover, you may implement the test | inspection part formation process of this invention, the division groove formation process, and an inspection process at any time, if it is before dividing | segmenting a printed circuit board. That is, these steps may be performed before or after mounting the electric circuit on the printed board. It is also possible to perform only the inspection process after mounting the electric circuit on the printed circuit board. In addition, if these three steps are carried out before mounting the electric circuit on the printed circuit board, when a defective formation of the dividing groove is detected, a countermeasure such as re-implementing the dividing groove forming step, This is advantageous because it can be easily performed on a printed circuit board on which an electric circuit is not mounted.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0022]
FIG. 1 is a plan view of an electric circuit device according to the present embodiment, FIG. 2 is a cross-sectional view of a portion corresponding to the line II-II in FIG. 1, and (a) is a state before a partition groove is formed. The state is shown, and (b) shows the state after the partition groove is formed. In FIG. 1, illustration of an electric circuit including circuit components such as a semiconductor element and electric wiring mounted on a printed board is omitted.
[0023]
The electric circuit device according to the present embodiment is configured such that four electric circuits are mounted on one printed circuit board 1. The printed circuit board 1 includes a base 1a formed in a rectangular plate shape with a resin and an insulating film 1b that covers one surface of the base 1a. On both the front and back surfaces of the printed circuit board 1, there are one partition groove 2 extending in the longitudinal direction formed in the center portion, and three partition grooves 2 extending in the lateral direction formed in the center portion and both end portions. The four partitioning grooves 2 are provided to provide four mounting areas A1 to A4 in which an electric circuit (not shown) is mounted and four spare areas B1 in which no electric circuit is mounted. To B4. The partition groove 2 is provided to divide the printed board 1 into the mounting areas A1 to A4 and the spare areas B1 to B4 later, and has a depth of about 1/3 of the thickness of the printed board 1. Is formed.
[0024]
A rectangular through hole 3 penetrating in the thickness direction of the printed circuit board 1 is provided at a portion where the vertical partition groove 2 and the lateral partition groove 2 intersect with each other. The division along 2 is made easier and more reliable.
[0025]
To each mounting area A1~A4 each reserve area B1 to B4, check lands 4 for detecting the current is disposed in the vicinity of the partitioning groove 2 one by one. Each check land 4 is formed into a circular thin plate shape with copper, and is held between the base portion 1a of the printed circuit board 1 and the insulating film 1b. The central portion of each check land 4 is not covered with the insulating film 1b and its surface is exposed.
[0026]
The check lands 4 provided in areas located on both sides of each partition groove 2 are connected to both ends of a conductor 5 arranged so as to cross the partition groove 2. The conductor 5 is in the form of a thin strip formed integrally with the check land 4 from copper, and is held between the base 1a of the printed circuit board 1 and the insulating film 1b. Since the conductor 5 is disposed at a position close to the surface of the printed circuit board 1, the conductor 5 is cut by the partition groove 2 when the partition groove 2 is formed. Therefore, since the partition groove 2 is normally formed between the check lands 4 that form a pair with both ends of each conductor 5 connected, current is not supplied. Thus, all four partition grooves 2 are formed normally by detecting the presence / absence of energization by the paired check lands 4 provided in areas located on both sides of each partition groove 2. Has been confirmed.
[0027]
The electric circuit device of the present embodiment configured as described above is manufactured as follows. First, an inspection portion forming step for forming the check land 4 and the conductor 5 on the printed circuit board 1 is performed. In this step, after the check land 4 and the conductor 5 integrated with a predetermined portion of the surface of the base 1a of the printed circuit board 1 are formed, the base 1a is coated by masking the central portion of each check land 4 and spraying. An insulating film 1b is formed on the surface. As a result, as shown in FIG. 2A, the printed circuit board 1 in which the check land 4 and the conductor 5 are provided between the base 1a and the insulating film 1b is formed.
[0028]
Next, the four partition grooves 2 are formed in predetermined portions on both the front and back surfaces of the printed circuit board 1 using a press device or the like, and a partition groove forming step is performed. As a result, the printed circuit board 1 is partitioned by the partition grooves 2 into four mounting areas A1 to A4 and four spare areas B1 to B4, as shown in FIG. At the same time, as shown in FIG. 2 (b), the conductor 5 having both ends connected to the pair of check lands 4 is cut by forming the partition groove 2.
[0029]
Next, whether or not the four partition grooves 2 are formed normally by detecting the presence or absence of energization by a tester or the like with the pair of check lands 4 provided in the areas on both sides of each partition groove 2. An inspection process for inspecting is performed. That is, when there is no energization between the paired check lands 4, it is determined that the partition groove 2 is normally formed (see FIG. 2B). On the contrary, when there is energization between the check lands 4 forming a pair, it is determined that the partition groove 2 is not normally formed (see FIG. 2A). In this case, the printed circuit board 1 is eliminated as a defective formation of the partition groove 2 and appropriately processed, such as returning to the partition groove formation step.
[0030]
Thereafter, an electric circuit made of a semiconductor element, electric wiring, or the like is mounted on the printed circuit board 1 in which all of the partition grooves 2 are confirmed to have been normally formed through an inspection process. The electric circuit device shown in FIG. 2B is completed. This electric circuit device is divided into four mounting areas A1 to A4 on which electric circuits are mounted and four spare areas B1 to B4 by dividing the printed circuit board 1 along the partitioning grooves 2. The As a result, four products as final electric circuit devices can be obtained from the four mounting areas A1 to A4.
[0031]
As described above, the electric circuit device according to the present embodiment determines whether or not the energization is performed by the pair of check lands 4 provided in areas located on both sides of the partition groove 2 before the printed circuit board 1 is divided. By detecting, it is possible to easily and reliably detect the formation failure of the partition groove 2. Therefore, before the printed circuit board 1 is divided, it is possible to eliminate those in which the partition grooves 2 are not normally formed, and this occurs because the printed circuit board 1 is not divided into a predetermined shape along the partition grooves 2. Defective products can be reduced. Thereby, productivity can be improved.
[0032]
Further, in the electric circuit device of this embodiment, since the check lands 4 for detecting a current is to be disposed one by one to each mounting area A1~A4 and each reserve area B1 to B4, vs The operation of detecting the presence / absence of energization between the check lands 4 can be easily performed in a short time.
[0033]
When a certain area is partitioned by a plurality of partitioning grooves 2 or when the space for disposing the conductors 5 is limited, a number of check lands corresponding to the number of partitioning grooves 2 are included in the area. 4 can be provided. In this way, the length of the conductor 5 whose both ends are connected to the pair of check lands 4 can be greatly reduced.
[0034]
Further, according to the method for manufacturing the electric circuit device of the present embodiment, the formation of the partition groove 2 is inspected by detecting the presence / absence of energization between the paired check lands 4 in the inspection process. A defective formation of the partition groove 2 can be detected easily and reliably, and productivity can be improved.
[0035]
In particular, in the manufacturing method of the present embodiment, the inspection section forming step, the partition groove forming step, and the inspection step are performed before mounting the electric circuit on the printed circuit board 1, and therefore, the partition groove 2 in the inspection step. When the formation failure is detected, a countermeasure such as re-performing the partition groove forming step can be easily performed on the printed circuit board 1 on which the electric circuit is not mounted.
[0036]
In addition, it is also possible to carry out these three steps or only the inspection step after mounting the electric circuit on the printed circuit board 1.
[Brief description of the drawings]
FIG. 1 is a plan view of an electric circuit device according to an embodiment of the present invention.
2 is a cross-sectional view of a portion corresponding to the line II-II in FIG. 1, where (a) shows a state before a partition groove is formed, and (b) shows a state after the partition groove is formed. Indicates the state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Printed circuit board 1a ... Base 1b ... Insulating film A1-A4 ... Mounting area B1-B4 ... Preliminary area 2 ... Partition groove 3 ... Through-hole 4 ... Check land 5 ... Conductor

Claims (2)

In an electric circuit device including a printed circuit board in which a plurality of partition grooves extending in a vertical direction and a lateral direction partitioning a plurality of areas on which an electric circuit is mounted are formed and divided into a plurality along each partition groove.
Wherein a check lands for detecting a current provided one by one to each said area of the printed circuit board, each of said compartments on both sides of each of said check lands each said compartments both ends are connected to a provided in each of said areas of the groove is connected to all of the check lands by Rukoto are disposed to cross the grooves, an electrical circuit device characterized by having a conductor that is cleaved by formation of each of the partition groove. A method of manufacturing an electric circuit device comprising a printed circuit board formed with a plurality of partition grooves extending in the vertical direction and the lateral direction for partitioning a plurality of areas on which the electric circuit is mounted, and divided into a plurality of sections along each partition groove In
To form a one by one check lands respectively, both ends to each of said check lands provided on both sides of each said area of each said compartment groove connected to each of said areas to be defined by each of said partition groove of said printed circuit board an inspection unit forming step of forming the connected conductors to all of the check lands by Rukoto is,
A partition groove forming step of forming each partition groove by cutting each conductor;
An inspection step of inspecting the formation of each of the partitioning groove by each said conductor to detect the presence or absence of energization between the check lands paired are connected,
A method for manufacturing an electric circuit device, comprising:

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