Two square memory cells having highly conductive word lines

Details Two square memory cells having highly conductive word lines Two square memory cells having highly conductive word lines

1989-03-27

1991-03-19

Jackson, Jr., Jerome

Static information storage and retrieval

Magnetic bubbles

Guide structure

357 231, 365182, H01L 2978, G11C 1134

Patent

active

050015257

ABSTRACT:
A very small memory cell utilizing only two squares at a major surface is provided which includes a semiconductor substrate having a major surface and a trench disposed therein having a longitudinal axis, a storage capacitor having a storage node disposed within a given sidewall of the trench, a switching device coupled to the storage capacitor and having an elongated current carrying element disposed within the given sidewall with its longitudinal direction arranged parallel to that of the longitudinal axis of the trench and a control element disposed on the sidewall of the trench between the storage capacitor and the elongated current carrying element, and an electrically conductive line disposed on the major surface of the semiconductor substrate in a direction orthogonal to the longitudinal axis of the trench and in contact with the control element of the switching device. Furthermore, two complete memory cells are formed at each trench-word line intersection with one cell formed on each side of the trench at each intersection.

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IBM Tech. Discl., vol. 31, #7, Dec. 88, pp. 307-308.
IBM Technical Disclosure Bulletin, vol. 27, No. 2, Jul. 1984, pp. 1313-1320, "Compact One-Device Dynamic RAM Cell with High Storage Capacitance" by C. G. Jambotkar.

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