Non-planar surface for semiconductor chips

Semiconductor device manufacturing: process – Packaging or treatment of packaged semiconductor – Assembly of plural semiconductive substrates each possessing...

Reexamination Certificate

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C438S666000, C438S122000

Reexamination Certificate

active

07037753

ABSTRACT:
A semiconductor chip package having a non-planar chip therein, to reduce the stress concentrations between the chip and cover plate. In particular, a chip and method of forming a chip having a non-planar or “domed” back surface, wherein the thickness of the non-planar chip is greatest substantially near the center of the chip. Further, a method of rounding the edges or corners of the chip to reduce crack propagation originating at the edges of the chip.

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“High Performance Carrier Technology: Materials And Fabrication”, by Light et al, 1993 International Electronics Packaging Conference, San Diego, California; vol. One.
“High Performance Carrier Technology”, by Heck et al. 1993 International Electronics Packaging Conference, San Diego, California, vol. One.
“Process Considerations in the Fabrication of Teflon Printed Circuit Boards”, by Light et al, 1994 Proceedings, 44 Electronic Components & Technology Conference, May 1994.

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