Lawrence Pei Lung Liu

US Patent:

57611122, Jun 2, 1998

Filed:

Sep 20, 1996

Appl. No.:

8/717031

Inventors:

Michael A. Murray - Bellevue WA
Lawrence C. Liu - San Jose CA
Li-Chun Li - Los Gatos CA

Assignee:

Mosel Vitelic Corporation - San Jose CA

International Classification:

G11C 1124

US Classification:

365149

Abstract:

A DRAM has a sensing circuit which includes an on-chip capacitors having a total capacitance greater than about 35% of the total capacitance of the bit lines. The on-chip capacitors are coupled to a power line of the sense amplifiers and stabilizes a power supply voltage to prevent voltage drop and noise during the large sensing currents for a read/refresh cycle. A read/refresh cycle in accordance with an embodiment of the invention includes precharging bit lines and the on-chip capacitors before connecting memory transistors to the bit lines and connecting power to the sense amplifiers. Capacitors can be formed in any available space in the integrated circuit particularly in space under metal bus lines in peripheral circuitry surrounding a memory array.

US Patent:

58442960, Dec 1, 1998

Filed:

Sep 20, 1996

Appl. No.:

8/717471

Inventors:

Michael A. Murray - Bellevue WA
Lawrence C. Liu - San Jose CA
Li-Chun Li - Los Gatos CA

Assignee:

Mosel Vitelic Corporation - San Jose CA

International Classification:

H01L 2710
H01L 2900

US Classification:

257529

Abstract:

A compact laser programmable fuse structure has a central line and two sets of fuses extending from opposite sides of the central line. An opening through a passivation layer exposes the fuses and overlies the central line. In one embodiment, the opening also exposes the portions of the central line. The central line is made of fuse material or another material for which the opening does not create reliability problems. In one embodiment of the invention, the central line and the fuses are parts of a single contiguous region of polysilicon. This fuse structure has a length that is about half the length of conventional fuse structure having the same number of fuses because two fuses, one on either side of the central line, fit within a length used for a single fuse in conventional fuse structures.