Patent ID: 9643285
Date: 2017-05-09
CPC Classifications: B23K,C08G,C08L,C22C

Claim:
1. A cream solder composition comprising a flux that includes an epoxy resin, an organic carboxylic acid and a plastic having a linear structure as a heat-resistant shape-retaining agent; and a particulate lead free solder, wherein the epoxy resin and the organic carboxylic acid are blended so that the quantity of carboxyl groups in the organic carboxylic acid is 0.8 to 2.0 equivalents relative to 1.0 equivalent of epoxy groups in the epoxy resin, and the total quantity of the epoxy resin, the organic carboxylic acid and the plastic having a linear structure is 70 mass % or more relative to the total mass of the flux.