Method for manufacturing solder product, solder, soldered component, printed wiring board, printed circuit board, wire, soldered product, flexible printed board, electronic component, method for manufacturing tin article, method for manufacturing tin intermediate product, tin intermediate product, and conductive member
AssigneesIshikawa Technology Laboratory Co., Ltd., Kayaba Office Co., Ltd., Akira OGIHARA
InventorsHisao ISHIKAWA, Masao KAYABA, Akira OGIHARA
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Abstract
A solder product 20 includes: a lead-free solder part 21 containing tin as a main component and a metal element other than lead as a secondary component; and a carboxylic acid having 10 to 20 carbons, the carboxylic acid being mainly distributed over the surface of the solder product 20 to form a surface layer 22. The carboxylic acid is preferably a fatty acid having 12 to 16 carbons, and more preferably a palmitic acid.
Claims43
A method for manufacturing a solder product, the method comprising:
- a heating step of heating and melting a raw material to obtain a molten metal, the raw material containing tin as a main component, a metal element other than lead as a secondary component, and a carboxylic acid having 10 to 20 carbons;
- a filtration step of filtering the molten metal set to a temperature from 230° C. to 260° C. with a filter having an aperture size of not more than 10 μm;
- and
- a cooling step of cooling and solidifying the filtered molten metal and depositing the carboxylic acid at a surface of the solder product.
A method for manufacturing a solder product, the method comprising:
- a heating step of heating and melting a raw material to obtain a molten metal, the raw material containing tin as a main component, a metal element other than lead as a secondary component, and a carboxylic acid having 10 to 20 carbons;
- a removing step of removing, from the molten metal set to a temperature from 230° C. to 260° C., solids having a diameter of more than 10 μm and present within the molten metal;
- and
- a cooling step of cooling and solidifying the molten metal with the solids removed therefrom and depositing the carboxylic acid at a surface of the solder product.
A method for manufacturing a solder product, the method comprising:
- a step of melting a raw material containing an alloy of a mixture of a plurality of metal elements and a carboxylic acid having 10 to 20 carbons to obtain a molten metal;
- a step of removing, from the molten metal set to a temperature from 230° C. to 260° C., solids with a grain size of more than 10 μm derived from the alloy;
- and
- a step of manufacturing a solder by solidifying the molten metal with the solids removed therefrom and depositing the carboxylic acid at a surface of the solder product.
A method for manufacturing a tin article, the method comprising:
- a heating step of heating and melting a raw material to obtain a molten metal, the raw material containing tin as a main component and a carboxylic acid having 10 to 20 carbons;
- a filtration step of filtering the molten metal set to a temperature from 230° C. to 260° C. with a filter having an aperture size of not more than 10 μm;
- a cooling step of cooling and solidifying the molten metal and depositing the carboxylic acid at a surface of the molten metal;
- and
- a forming step of shaping the molten metal into a tin article.
A method for manufacturing a tin intermediate product, the method comprising:
- a heating step of heating and melting a raw material to obtain a molten metal, the raw material containing tin as a main component and a carboxylic acid having 10 to 20 carbons;
- a filtration step of filtering the molten metal set to a temperature from 230° C. to 260° C. with a filter having an aperture size of not more than 10 μm;
- and
- a cooling step of cooling and solidifying the molten metal and depositing the carboxylic acid at a surface of the tin intermediate product.
Dependencies are inferred from the claim text.