A 64 Mb MROM with good pair selection architecture

Abstract

The needs for high density mask programmable ROM (MROM) have increased rapidly due to the demand for storing the Kanji character fonts and dictionaries used in Japanese word processors. For example, desktop publishing uses MROMs for 80 M bits fixed data. The authors describe a 64 Mb MROM which employs a 'good pair selection' as a type of redundancy technique. Employing the technology a flat cell structure and a bank selection architecture and a 0.8 mu m CMOS process, they have developed high density 64 Mb MROM.<>