Method of attaching solder balls to BGA package utilizing a...

Semiconductor device manufacturing: process – Packaging or treatment of packaged semiconductor

Reexamination Certificate

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C438S612000, C228S245000, C029S841000

Reexamination Certificate

active

06844216

ABSTRACT:
A method of attaching solder balls to a BGA package using a ball pickup tool. An array of solder balls is formed on a first substrate for interconnecting with conductive sites on another substrate. The ball pickup tool picks up balls with a vacuum suction from a fluidized ball reservoir and utilizes a puff of gas to release the solder ball(s) carried thereon to conductive sites of a substrate for bonding thereto. In another embodiment, the bond pads of a substrate are coated with a flux or adhesive and lowered into a fluidized ball reservoir for direct attachment of solder balls.

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