Semiconductor memory device

Details Semiconductor memory device Semiconductor memory device

1988-03-04

1989-12-12

Larkins, William D.

Static information storage and retrieval

Magnetic bubbles

Guide structure

357 41, 357 24, 365 53, 365149, H01L 2978

Patent

active

048871370

ABSTRACT:
A semiconductor memory device comprises four memory cells (4a, 6) arranged in point symmetry on a semiconductor substrate (1), and an insulating layer (10) covering the memory cells and having one contact hole (2) placed in the center of the point symmetry, with the contact hole enabling electrical connection to each of the memory cells.

REFERENCES:
patent: 4287571 (1981-09-01), Chakravarti et al.
patent: 4541006 (1984-01-01), Ariizumi et al.
patent: 4651183 (1987-03-01), Lange
patent: 4654825 (1987-03-01), Rinerson
patent: 4737837 (1988-04-01), Lee
patent: 4763178 (1988-08-01), Sakui et al.

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