Browse Prior Art Database

Program to Save Polysilicon Wires during Release Interface Tape B Processing

IP.com Disclosure Number: IPCOM000114493D
Original Publication Date: 1994-Dec-01
Included in the Prior Art Database: 2005-Mar-28
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Lawrence, JA: AUTHOR

Abstract

Disclosed is a program that restores the original state of the polysilicon wires during Release Interface Tape (RIT) B processing.

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Program to Save Polysilicon Wires during Release Interface Tape B
Processing

      Disclosed is a program that restores the original state of the
polysilicon wires during Release Interface Tape (RIT) B processing.

      A RIT is a Release Interface Tape -- the input to manufacturing
for a Very Large Scale Integration (VLSI) chip.  A "RIT B" is a logic
change to a chip, where such change can be implemented by changing
only the metal layers of the chip.  Some technologies have a layer of
polysilicon wiring which cannot be changed during a RIT B.

      The disclosed program replaces the new polysilicon wires with
the original ones.  The new logic and new metal wires are retained.
Each polysilicon wire is traced back to a logic pin to determine the
netname that it should have (Figure).