Method and system for ROM coding to improve yield

Details Method and system for ROM coding to improve yield Method and system for ROM coding to improve yield

2007-12-04

2007-12-04

Whitmore, Stacy A. (Department: 2825)

Computer-aided design and analysis of circuits and semiconductor

Nanotechnology related integrated circuit design

C716S030000, C716S030000, C703S028000, C712S015000

Reexamination Certificate

active

11128863

ABSTRACT:
A method for improving yield of a process for fabricating a read-only memory (ROM) includes evaluating a yield of a ROM fabrication process associated with a first ROM design. At least two candidate ROM design modifications are identified. At least one of the candidate ROM design modifications comprises inversion of bit values of data to be stored in the ROM. A plurality of criteria are applied, including at least an amount of yield improvement and a difficulty of implementation associated with each candidate ROM design modification. One of the candidate ROM design modifications is selected based on the application of the criteria. A modified ROM fabrication process is performed to fabricate a ROM according to the selected ROM design modification.

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patent: 6096091 (2000-08-01), Hartmann
patent: 6587364 (2003-07-01), Kablanian et al.
patent: 2004/0210814 (2004-10-01), Cargnoni et al.
“Lossless Data Compression”, http://www.data-compression.com/lossless.html, Apr. 20, 2005.

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