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Flux, solder paste, substrate, electronic device, and substrate manufacturing method

A technology of flux and substrate, applied in welding equipment, manufacturing tools, metal processing equipment, etc., can solve problems such as short circuit, insect intrusion such as cockroaches, etc.

Inactive Publication Date: 2019-12-24
SENJU METAL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For household appliances such as refrigerators and air conditioners, insects such as cockroaches may sometimes invade the inside of the body, and when these insects come into contact with the electrodes on the printed circuit board, it may cause a short circuit

Method used

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  • Flux, solder paste, substrate, electronic device, and substrate manufacturing method
  • Flux, solder paste, substrate, electronic device, and substrate manufacturing method
  • Flux, solder paste, substrate, electronic device, and substrate manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 3

[0074] In Examples 1 to 3, the soldering flux contains: 0.5% by weight of succinic acid as an organic acid, 0.5% by weight of 2,3-dibromo-1,4-butanediol as an organic halogen compound, and 0.8% by weight of ethylamine hydrobromide as the hydrogen salt of the amine halide compound. In Examples 1 to 3, the soldering flux contains 12% by weight of hydrogenated rosin as modified rosin, the remainder as a solution consisting of isopropanol. In Examples 1 to 3, insect repellent polyester was used as the insect repellant, and the content thereof was 1 wt%, 0.5 wt%, and 3 wt%, respectively.

[0075] Components contained in the fluxes related to Examples 1 to 3 are shown in [Table 1]. In each of the following tables, "◯" for "solubility" means that the solubility was confirmed in the aforementioned solubility test, and "◯" for "volatility" means that no volatility was confirmed in the aforementioned volatility test. "Comprehensive evaluation" is "(circle)", and it shows that favorabl...

Embodiment 4 to 8

[0081] In Examples 4 to 8, except that the insect repellent was changed from insecticidal polyester to other materials, the same materials were used as in Example 1, and the details are shown in [Table 2].

[0082] 【Table 2】

[0083]

[0084]

[0085] (weight%)

Embodiment 9 to 13

[0087] In Examples 9 to 13, except that the insect repellant was changed from insecticidal polyester to other materials, the same materials were used as in Example 1, and the details are shown in [Table 3].

[0088] 【table 3】

[0089]

[0090] (weight%)

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Abstract

The present invention provides a flux and a solder paste, which can prevent insects and the like from approaching components using solder, and also provides a substrate, an electronic device and a method for manufacturing the substrate, which can prevent insects and the like from approaching. According to the present invention, a flux used in soldering contains a resin, an activator, a solvent, and a repellent, the repellent being soluble in the solvent and having no prescribed volatility in the solvent.

Description

technical field [0001] The invention relates to flux, solder paste, substrate, electronic device and substrate manufacturing method. Background technique [0002] Conventionally, fluxes used for soldering have been widely known (for example, refer to Patent Document 1). Specifically, flux is a material used when mounting electronic components such as semiconductor elements, capacitors, and resistors on printed circuit boards and the like. It has been widely used in various electronic devices, including common household appliances, such as refrigerators, air conditioners, etc., which use flux. [0003] For household appliances such as refrigerators and air conditioners, insects such as cockroaches may sometimes invade the inside of the body, and when these insects come into contact with electrodes on the printed circuit board, short circuits may occur. Therefore, there is a need to counteract the inaccessibility of these insects to the substrate. Especially in developing c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/363
CPCB23K35/3613B23K35/362
Inventor 冨塚健一沟胁敏夫上田松太郎平岡浩佑
Owner SENJU METAL IND CO LTD