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Substrate Wiring Patterns for Partial Good Integrated Circuit Chips

IP.com Disclosure Number: IPCOM000049783D
Original Publication Date: 1982-Jul-01
Included in the Prior Art Database: 2005-Feb-09

Publishing Venue

IBM

Related People

Authors:
Johnson, CL Ryba, JM [+details]

Abstract

Partial-good memory programs are able to utilize chips which are not completely functional. For instance, if 4 good bits per chip were needed, a chip could be designed with 5 bits, allowing 1 bit to be bad. This will greatly improve usable chip yields. However, chip packaging becomes more complicated. In this instance, five different substrate designs would be needed to accommodate the five different combinations of 4 good data bits.