Method of reducing wire bond profile height in integrated...

Details Method of reducing wire bond profile height in integrated... Method of reducing wire bond profile height in integrated...

2011-08-02

2011-08-02

Ward, Jessica L (Department: 1735)

Metal fusion bonding

Process

With shaping

Reexamination Certificate

active

07988033

ABSTRACT:
A method of profiling a wire bond between a contact pad on a die, and a conductor on a supporting structure, by electrically connecting the contact pad on the die to the conductor on the supporting structure with a wire bond, the wire bond extending in an arc from the contact pad to the conductor, pushing on the wire bond to collapse the arc and plastically deform the wire bond, and then releasing the wire bonds such that the plastic deformation maintains the wire bond in a flatter profile shape. The strength of the wire bond is known to be relatively small; of the order of 3 to 5 grams force. However, the Applicant's work has found that the wire bond structure is robust enough to withstand a certain degree of work hardening from plastic deformation. The arc of the wire bond can be deformed into a flatter profile without compromising the electrical connection with the PCB.

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