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Josephson Read Only Memory Personalization

IP.com Disclosure Number: IPCOM000068363D
Original Publication Date: 1979-Dec-01
Included in the Prior Art Database: 2005-Feb-20

Publishing Venue

IBM

Related People

Authors:
Chang, WH [+details]

Abstract

This article relates to the personalization of Josephson read-only memories by the use of a second groundplane above the interferometers of an array of memory cells. Identical two-junction interferometer memory cells can be fabricated up to the M4A (control line metallization) and the 14A (control line insulation) layers. Personalization is achieved by providing an additional-metal groundplane above the memory cell if the binary digit "0" is desired, whereas no additional groundplane is provided if a binary "1" is desired.