Soldering flux, solder paste and method of soldering

Metal fusion bonding – Process – With protecting of work or filler or applying flux

Reexamination Certificate

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Details

C148S023000

Reexamination Certificate

active

06915944

ABSTRACT:
The present invention relates to a soldering flux, a soldering paste and a soldering method that achieve a sufficient degree of bonding strength even when components are mounted at a higher density, components are further miniaturized or components are mounted with a smaller pitch. A flux3contains an adhesive resin and a hardening agent. This flux or a soldering paste containing the flux is applied onto a component mounting board1, and then, an electronic component4is mounted and soldered onto the component mounting board1.

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Taro Hukui: “Required characteristic and developing direction in under fill materials” High-Density Mounting Technology, vol. 5, pp. 116-122, Nov. 9, 1999.

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