JP7387701B2 - Solid body for producing flux and method for producing flux - Google Patents

Description

The present invention relates to a flux-producing solid body for producing flux.

Conventionally, flux has been used when applying solder to a substrate or the like. It is known that flux is produced by mixing IPA (isopropyl alcohol), an activator, etc. For example, in Patent Document 1, flux is produced by mixing rosin (pine resin), an activator, a thickener, a solvent, etc. It is disclosed that it can be prepared.

JP2021-062410A

Flux is a liquid and is heavy, so transportation costs are incurred when transporting flux to customers or overseas corporations. On the other hand, it is conceivable to transport rosin, activators, additives, etc. in the form of granules or powder, but this would be complicated to handle.

The present invention has been made in consideration of these points, and provides a solid body for producing flux that can produce liquid flux with simple handling while suppressing transportation costs.

The solid body for flux generation according to the present invention is
It may contain a resin and an activator and may be molded.

In the solid body for producing flux according to the present invention,
The resin content may be 50% by mass or more.

The solid body for flux generation according to the present invention is
It may have an inner part and an outer part that covers part or all of the inner part.

In the solid body for producing flux according to the present invention,
The content ratio of the resin contained in the outer part may be higher than the content ratio of the resin contained in the inner part.

In the solid body for producing flux according to the present invention,
The content ratio of the resin in the outer part may be 50% by mass or more.

In the solid body for producing flux according to the present invention,
the inner part includes an additive;
The outer portion may be free of additives.

The weight of the flux-producing solid body according to the invention may be between 10 and 150 g.

The flux-producing solid body according to the present invention may be mixed with isopropyl alcohol to form a liquid flux.

The solid body for flux generation according to the present invention may be used to generate flux by being filled in a flux generation device and mixed with a liquid solvent in the flux generation device.

By using the flux-generating solid body of the present invention, a liquid flux can be generated simply by mixing it with a liquid solvent. Therefore, it is possible to prepare the liquid solvent at the place where the liquid flux is actually used, such as at a customer or an overseas corporation, thereby reducing transportation costs. Moreover, if the flux-generating solid body of the present invention is used, there is no need to handle the resin in a granular or powdered state, so that liquid flux can be generated with simple handling.

FIG. 1 is a vertical cross-sectional view showing an aspect of the solid body for producing flux according to the present invention, which has a double structure. FIG. 2 is a perspective view showing a solid body for producing flux according to the present invention, in which the side surface of the inner part is covered with the outer part. FIG. 1 is a vertical cross-sectional view showing a solid body for producing flux according to the present invention, which does not have a double structure and is uniform throughout. 1 is a schematic diagram of a flux generation device in which a solid body for flux generation according to the present invention can be set (filled); FIG. 3 is a sectional view showing a mode of molding the inner part of the solid body for flux generation according to the present invention. FIG. 3B is a cross-sectional view illustrating a step subsequent to FIG. 3A in which the molded inner portion is placed into the molten outer component material. FIG. 3B is a cross-sectional view illustrating a process subsequent to FIG. 3B, in which the inner part is housed in the outer part and cooled to form a double-structured flux-generating solid body.

Embodiment 《Configuration》
In this embodiment, a flux-generating solid body 300 containing a resin such as rosin and an activator and molded into a predetermined shape is provided. The flux-generating solid body 300 becomes a liquid flux by being mixed with a liquid solvent. The flux-generating solid body 300 may also contain other additives. The flux generation solid body 300 may be used in a flux generation device described later, or may be used manually by an operator when generating flux.

As the liquid solvent, water, alcohol solvents, glycol ether solvents, terpineols, etc. can be used. Examples of alcoholic solvents include isopropyl alcohol, 1,2-butanediol, isobornylcyclohexanol, 2,4-diethyl-1,5-pentanediol, 2,2-dimethyl-1,3-propanediol, 2,5-dimethyl-2,5-hexanediol, 2,5-dimethyl-3-hexyne-2,5-diol, 2,3-dimethyl-2,3-butanediol, 2-methylpentane-2,4 -diol, 1,1,1-tris(hydroxymethyl)propane, 2-ethyl-2-hydroxymethyl-1,3-propanediol, 2,2'-oxybis(methylene)bis(2-ethyl-1,3) -propanediol), 2,2-bis(hydroxymethyl)-1,3-propanediol, 1,2,6-trihydroxyhexane, 1-ethynyl-1-cyclohexanol, 1,4-cyclohexanediol, 1, Examples include 4-cyclohexanedimethanol and 2,4,7,9-tetramethyl-5-decyne-4,7-diol. Examples of glycol ether solvents include diethylene glycol mono-2-ethylhexyl ether, ethylene glycol monophenyl ether, diethylene glycol monohexyl ether, diethylene glycol dibutyl ether, triethylene glycol monobutyl ether, methylpropylene triglycol, butylpropylene triglycol, Examples include triethylene glycol butyl methyl ether and tetraethylene glycol dimethyl ether. However, in this embodiment, isopropyl alcohol is typically used.

This aspect of the present embodiment is particularly useful when handling a dangerous substance that is flammable, such as isopropyl alcohol, as a liquid solvent. Since isopropyl alcohol is a dangerous substance that is flammable, its handling is becoming stricter. In this regard, when the flux generating solid body 300 as in this embodiment is adopted, the handling of isopropyl alcohol can be left to a person (for example, a customer) who is qualified to handle it, and the manufacturer can This is beneficial in that it reduces the burden.

Further, according to this embodiment, even when manufacturing liquid flux not only in Japan but also overseas, only the solid material 300 for producing flux is exported and mixed with a liquid solvent such as isopropyl alcohol at the site. Since flux can be generated, transportation costs can be significantly reduced compared to the case of transporting liquid flux.

It is also possible to handle rosin, activators, additives, etc. in powder form, but if powder is used, there is a possibility that the powder may fly away during transportation or conveyance, and the appropriate blending ratio may change. There is a possibility that an appropriate liquid flux cannot be provided. Additionally, measurement is required when producing the flux, which is difficult to handle, especially when the customer mixes powders such as rosin, activators, additives, etc. with a liquid solvent to produce a liquid flux. On the other hand, by employing the flux-generating solid body 300 as in this embodiment, it is sufficient to simply mix the flux-generating solid body 300 with a liquid solvent, and such inconveniences can be prevented from occurring. You can also do it.

In addition, if a block body with a fixed shape and weight is used as the solid body 300 for generating flux, instead of using a granular body whose count and weight are not determined, it is necessary to measure the solid body 300 when generating liquid flux. This is useful in that it can be managed by the number of pieces without having to do so. Further, when the flux generation device 100 is employed, it is advantageous in that setting to the flux generation device 100 is also facilitated.

In addition, since it includes know-how regarding the ingredients and amounts of rosin, activators, and additives, it is difficult to provide them to customers as is. On the other hand, by employing the flux-generating solid body 300 as in this embodiment, leakage of such know-how can also be prevented.

The flux generating solid body 300 may have a predetermined shape, and may have a block shape such as a substantially cube, a rectangular parallelepiped, a substantially cylindrical shape, or the like. The weight of one flux-generating solid body 300 may be about 10 to 150 g, or about 30 to 80 g. Each of the plurality of flux-generating solid bodies 300 may have the same shape.

The smaller the size of the flux-generating solid body 300, the higher the solubility, but on the other hand, the larger the size of the flux-generating solid body 300, the easier it is to handle. For these reasons, it is advantageous for the weight of the flux-generating solid body 300 to be approximately 30 to 80 g.

The content of rosin, which is a resin, in the flux-generating solid body 300 may be 50% by mass or more. In this case, the content of activator and additive will be less than 50% by weight. The higher the rosin content, the easier it will set, the less sticky it will be, and the easier it will be to handle.

The flux-generating solid body 300 may have a double structure, including an inner part 310 and an outer part 320 that covers the inner part 310. The weight ratio of the inner part 310 and the outer part 320 may be 9:1 to 1:1. The outer portion 320 may be an outer membrane that covers all or part of the inner portion 310. As shown in FIG. 1A, an outer section 320 may be provided that completely covers the inner section 310. Further, as shown in FIG. 1B, an outer portion 320 may be provided that covers a portion of the inner portion 310. In the embodiment of FIG. 1B, the outer part 320 covers the side surface of the cylindrical inner part 310. Further, it is not necessary to have a double structure, and as shown in FIG. 1C, the flux-generating solid body 300 may be made of a uniform material throughout.

Advantageously, the stickiness of the outer part 320 is reduced compared to the stickiness of the inner part 310. By reducing the stickiness of the outer portion 320 in this manner, handling of the flux-generating solid body 300 becomes easier.

In order to suppress stickiness in the outer part 320, the content ratio of rosin contained in the outer part 320 may be increased, and the content ratio of rosin contained in the outer part 320 is higher than that of the rosin contained in the inner part 310. It may be higher than the content ratio. The content of rosin in the outer part 310 may be from 50% by mass to 80% by mass, and the content of rosin in the inner part 310 may be from 10% by mass to 70% by mass. The flux producing solid body 300 may contain additives in an amount of 2% to 30% by weight.

The flux-generating solid body 300 may include the additive only in the inner part 310 and may not contain the additive in the outer part 320. In this case, the additive may be contained in the inner portion 310 in an amount of 5 to 40% by mass. If the additive tends to be sticky, the stickiness in the outer portion 320 may be suppressed by reducing the content of the additive. The components of only the outer part 320 are adjusted from the viewpoint of stickiness, and the components of the inner part 310 are adjusted from the viewpoint of the entire components (resin and activator contained in the entire solid body 300 for flux generation) without considering stickiness. and the ratio of additives).

As an example, the component ratios shown in Table 1 below may be used. In the inner part 310, the content of the additive is greater than the content of the activator, and the content of resin such as rosin may be greater than the content of the additive (content of the activator < addition). agent content <resin content). Further, in the outer portion 320, the content of resin such as rosin may be greater than the content of the activator (content of activator<content of resin).

Examples of the rosin include raw material rosin such as gum rosin, wood rosin, and tall oil rosin, and derivatives obtained from the raw material rosin. Examples of such derivatives include purified rosin, hydrogenated rosin, disproportionated rosin, polymerized rosin, acid-modified rosin, acid-modified hydrogenated rosin, phenol-modified rosin, and α,β-unsaturated carboxylic acid modified products (acrylated rosin, maleated rosin, fumarated rosin, etc.), purified products, hydrides, and disproportionated products of the polymerized rosin, and purified products, hydrides, and disproportionated products of the α,β-unsaturated carboxylic acid modified product, etc. . One type of rosin may be used alone, or two or more types may be used in combination. Note that resins other than rosin may be used as the resin, such as acrylic resin, terpene resin, modified terpene resin, terpene phenol resin, modified terpene phenol resin, styrene resin, modified styrene resin, xylene resin, modified xylene resin, polyethylene. , polypropylene, polyvinyl acetate, polyvinyl alcohol, polyethylene polypropylene copolymer, and polyethylene polyvinyl acetate copolymer.

Examples of the activator include one or more of those commonly used in fluxes, such as organic acids, amines, organic halogen compounds, amine hydrohalides, phosphonic acids, and phosphoric esters. Can be used in combination.

As additives, for example, antioxidants, rust preventives, antifoaming agents, matting agents, surfactants, colorants, etc. can be used, and one or more types of additives may be used. .

《Flux generation device》
Next, the flux generation device 100 in which the flux generation solid body 300 is set will be briefly described.

As shown in FIG. 2, the flux generation device 100 of the present embodiment includes a stock section 90 that stocks the flux generation solid bodies 300, and a second section that supplies a predetermined number of flux generation solid bodies 300 from the stock section 90. a second supply section 85 having a supply drive section 86 that supplies the liquid solvent L1 from the storage section 80; and a solid body 300 for generating flux supplied from the first supply section 95 and the second supply section 85. The generating unit 10 may include a stirring unit 20 that generates the liquid flux L2 by mixing the liquid flux L1 supplied from the liquid flux L1. The stirring section 20 may include a rotated section 21 made of a stirring screw or the like, and a drive section 25 such as a motor for rotationally driving the rotated section 21 . The rotated part 21 and the drive part 25 are connected via a shaft 22, and when the shaft 22 is rotated by the drive part 25, the rotated part 21 is rotated. The supply section 85 has a supply pipe 87 extending from the liquid solvent L1 in the storage section 80 to the stirring container 30, and the supply drive section 86 described above may be provided in this supply pipe 87.

A discharge section 115 may be provided for supplying the liquid flux L2 in the stirring container 30 toward the temporary storage section 110. The discharge section 115 has a discharge pipe 117 provided on the bottom surface of the stirring container 30, and a discharge drive section 116 including a pump or the like may be provided on the discharge pipe 117.

The generation unit 10 may include a stirring container 30, a hydrometer 40 that measures the specific gravity of the liquid in the stirring container 30, and a thermometer 45 that measures the temperature of the liquid. The hydrometer 40 and thermometer 45 may be connected to a specific gravity control section 48. The specific gravity control section 48 may derive the flux concentration from the information read from the hydrometer 40 and thermometer 45, and display the result on the display section 49.

The flux generation device 100 may include a control unit 50 that controls each component, and a storage unit 60 that stores various information. The control unit 50 is connected to the storage unit 60 and may read information from the storage unit 60 as appropriate. Further, information on each component may be recorded in the storage unit 60 directly or via the control unit 50. Connections in this embodiment include both wired and wireless connections, and may be wired or wireless.

A flux supply section 120 that is connected to the generation section 10 and supplies the liquid flux L2 generated by the generation section 10 to the object to be processed 200 may be provided. The flux supply unit 120 may be movable relative to the object to be processed 200, and may be able to move in the in-plane direction of the object to be processed 200, or may be able to approach or move away from the object to be processed 200. . The flux supply section 120 may include a supply nozzle 121. Although the object to be processed 200 is not particularly limited, one example is a substrate on which a semiconductor chip is placed. The flux may be sprayed from the supply nozzle 121 onto a predetermined location on the substrate. The flux supply section 120 includes a supply pipe 129 provided between the temporary storage section 110 and the supply nozzle 121, and a pump or the like provided in the supply pipe 129 for supplying the liquid flux L2 from the temporary storage section 110. The drive unit 126 may also include a drive unit 126.

Further, the first supply section 95 may include a lower slide section 95a and an upper slide section 95b provided above the lower slide section 95a. The flux-generating solid body 300 may be dropped by opening the lower slide part 95a while the upper slide part 95b is in the closed state. Thereafter, after the lower slide section 95a is closed, the upper slide section 95b may be opened and one flux-generating solid body 300 may be dropped onto the lower slide section 95a. After that, the upper slide part 95b may be in a closed state, and one flux-generating solid body 300 may be located between the upper slide part 95b and the lower slide part 95a. According to such an embodiment, the solid bodies 300 for producing flux can be supplied one by one.

The flux generation device 100 may include a housing casing 180 for accommodating the generation unit 10 and the like, and a moving unit 190 such as a moving roller provided on the bottom surface of the housing casing 180. By employing such an aspect, the generation unit 10 and the housing casing 180 can be easily moved.

A liquid level gauge 70 that can communicate with the control unit 50 is provided in the stirring vessel 30, and the control unit 50 receives information from the liquid level gauge 70 and determines how much liquid flux L2 has been discharged from the stirring vessel 30. may be detected.

Furthermore, an operation section 55 that is composed of a personal computer, a tablet, a smartphone, etc. and can communicate with the control section 50 may be provided. The identification information of the liquid flux L2 to be generated and the like may be inputted from the operation unit 55. When the identification information of the liquid flux L2 is input, a recipe including the required number of solid bodies S and the amount of the liquid solvent L1 may be read by the control unit 50 from the storage unit 60 based on the information. Then, in response to a command from the control unit 50, the predetermined liquid flux L2 may be generated in the flux generation device 100 according to a recipe.
"Production method"

Next, an example of a method for manufacturing the solid body 300 for producing flux will be described.

First, an inner component material including rosin, activator, additives, etc. is placed in a first mold 310 and molded (see FIG. 3A). This makes it possible to produce the inner part 310 having a predetermined shape. In this case, the inner part 310 may be generated by heating using heat from the first heating section 380 such as a heater to melt the inner component material, and then cooling and solidifying it. Cooling of the inner component material may be performed by natural cooling.

Next, the outer component material 320a is heated and melted within the second mold 320 using heat from the second heating unit 390 such as a heater. The molded inner portion 310 is then introduced into the molten outer component material 320a (see FIG. 3B). The outer component material may be additive-free and may consist of rosin and active agent.

After that, the outer component material 320a is cooled and solidified in the second mold 320, thereby producing a flux-generating solid body 300 having a double structure in which the inner part 310 is covered with the outer part 320. (See Figure 3C). Cooling of the outer component material 320a may be performed by natural cooling.

In an embodiment of producing a flux-generating solid body 300 having a double structure as shown in FIG. The inner portion 310 may be in a floating state. In this case, the outer component material 320a may be once solidified with the inner part 310 floating on the molten outer component material 320a. In this case, the outer part 320 is provided so as to cover the bottom and side surfaces of the inner part 310. Additional outer component material 320a may then be introduced such that outer component material 320a covers the entire top surface of inner portion 310. By cooling and solidifying the additionally charged outer component material 320a, an outer portion 320 that covers the entire inner portion 310 is provided.

The description of each of the embodiments described above and the disclosure of the drawings are merely examples for explaining the invention described in the claims, and the scope of the claims is determined by the description of each of the embodiments described above or the disclosure of the drawings. The invention described in is not limited thereto. Furthermore, the claims originally filed are merely examples, and the claims may be changed as appropriate based on the description, drawings, etc.

300 Solid body for flux generation 310 Inner part 320 Outer part

Claims (9)

Contains resin and activator;
A solid body for producing flux that is molded into a predetermined shape and weighs 10 to 150 g. The solid body for producing flux according to claim 1, wherein the content of the resin is 50% by mass or more. Contains resin and activator;
A solid body for producing flux, which has an inner part and an outer part covering a part or all of the inner part. The solid body for flux generation according to claim 3, wherein the content ratio of the resin contained in the outer part is higher than the content ratio of the resin contained in the inner part. The solid body for flux generation according to claim 3 or 4, wherein the content ratio of the resin in the outer part is 50% by mass or more. the inner part includes an additive;
The solid body for producing flux according to any one of claims 3 to 5, wherein the outer part does not contain an additive. The solid body for producing flux according to any one of claims 1 to 6, which is used to produce a liquid flux by being mixed with a liquid solvent. The solid body for flux generation according to any one of claims 1 to 7, which is used to generate flux by being filled in a flux generation device and mixed with a liquid solvent in the flux generation device. A method for producing a flux, comprising mixing the flux producing solid according to any one of claims 1 to 8 with a liquid solvent to produce a liquid flux.