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US 7,926,697 B2Granted
Underfill formulation and method of increasing an adhesion property of same
AssigneeIntel Corporation
InventorsLinda Shekhawat, Gregory S. Constable, Youzhi E. Xu, Nisha Ananthakrishan
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Abstract
An underfill formulation includes a solvent (110), a plurality of amphiphilic block copolymers (120) in the solvent, and an adhesion promoter (130) in the solvent. Groups of the plurality of amphiphilic block copolymers form a plurality of micelles (140) in the solvent, with the micelles including a core (141) and a shell (142) surrounding the core, and the adhesion promoter is in the core of at least some of the plurality of micelles.
Claims11
An underfill formulation comprising:
- a nonpolar solvent;
- a plurality of amphiphilic block copolymers in the solvent;
- and
- an adhesion promoter in the solvent,
- wherein:
- groups of the plurality of amphiphilic block copolymers form a plurality of micelles in the solvent, the micelles comprising a polar core and a nonpolar shell surrounding the polar core;
- the adhesion promoter is in the core of at least some of the plurality of micelles;
- each one of the plurality of amphiphilic block copolymers comprises a polar block covalently bonded to a first nonpolar block at a first end thereof;
- and
- each one of the plurality of amphiphilic block copolymers further comprises a second nonpolar block covalently bonded to a second end of the polar block.
7 more elements
An underfill formulation comprising:
- a nonpolar solvent;
- a plurality of amphiphilic block copolymers in the solvent;
- and
- an adhesion promoter in the solvent,
- wherein:
- groups of the plurality of amphiphilic block copolymers form a plurality of micelles in the solvent, the micelles comprising a polar core and a nonpolar shell surrounding the polar core;
- the adhesion promoter is in the core of at least some of the plurality of micelles;
- each one of the plurality of amphiphilic block copolymers comprises a polar block covalently bonded to a first nonpolar block at a first end thereof;
- the first nonpolar block comprises siloxane;
- and
- the polar block comprises one of poly(methyl methacrylate), poly(N-acetylethylenimine), and a polyether.
8 more elements
Dependencies are inferred from the claim text.