Wafer applied fluxing and underfill material, and layered...

Semiconductor device manufacturing: process – Packaging or treatment of packaged semiconductor – Including adhesive bonding step

Reexamination Certificate

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Details

C438S127000, C257S783000, C257S787000

Reexamination Certificate

active

07109061

ABSTRACT:
A flip-chip type integrated circuit chip including a chip die having electrical contacts arranged in a predetermined pattern and capable of providing electrical interconnection with a carrier substrate is provided. The chip die includes a fluxing agent disposed on a surface of the electrical contacts, and a curable thermosetting underfill composition distinct from the fluxing agent and disposed in a flowable form over the chip die. Upon mating of the chip die with the substrate and heating, the electrical contacts flow and the thermosetting underfill composition cures, thus adhering the chip die to the substrate, forming a circuit assembly.

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