Fluxing agent for underfill materials

Details Fluxing agent for underfill materials Fluxing agent for underfill materials

2006-04-11

2006-04-11

Brunsman, David (Department: 1755)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C523S455000, C148S025000, C257S778000, C427S096200, C427S096600, C106S218000, C106S241000

Reexamination Certificate

active

07026376

ABSTRACT:
An underfill material, such as a no flow underfill material, containing an anhydride adduct of a rosin compound is disclosed. In one aspect, the anhydride adduct of a rosin compound contains an organic rosin acid moiety and a substitute moiety for a hydroxyl group of a carboxylic acid attached at an acyl group of the organic rosin acid moiety. In another aspect, the anhydride adduct of the rosin compound contains a plurality of linked organic rosin acid moieties. Methods of using the underfill materials and packages formed by curing the underfill materials are also disclosed.

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