Alignment insensitive D-cache cell

Details Alignment insensitive D-cache cell Alignment insensitive D-cache cell

2007-12-04

2007-12-04

Purvis, Sue A. (Department: 2826)

Active solid-state devices (e.g., transistors, solid-state diode

Field effect device

Having insulated electrode

C257S202000, C257S903000, C257S904000, C257S296000, C257S300000, C257S508000, C257SE27099, C257SE27101, C257SE21661, C365S063000, C365S154000

Reexamination Certificate

active

11111454

ABSTRACT:
A D-Cache SRAM cell having a modified design in schematic and layout that exhibits increased symmetry from the circuit schematic and the physical cell layout perspectives. That is, the SRAM cell includes two read ports and minimizes asymmetry by provisioning one read port on a true side and one on the complement side. Asymmetry is additionally minimized in layout as cross coupling on both the true and complement sides rises up one level by providing from the local interconnect level a via connection to a M1 or metallization level. Moreover, the distance between the local interconnect (MC) and the gate conductor structure (PC) has been enlarged and equalized for each of the pFETs in the cross-latched SRAM cell. As a result, the SRAM cell has been rendered insensitive to overlay (local interconnect processing too close) by maximizing this MC-PC distance.

REFERENCES:
patent: 5473574 (1995-12-01), Clemen et al.
patent: 5973986 (1999-10-01), Jung
patent: 6661733 (2003-12-01), Pan et al.
patent: 6737685 (2004-05-01), Aipperspach et al.
patent: 6744661 (2004-06-01), Shubat
patent: 6751151 (2004-06-01), Hsu et al.
patent: 2002/0100920 (2002-08-01), Yamauchi et al.
patent: 2003/0123279 (2003-07-01), Aipperspach et al.
patent: 2004/0075151 (2004-04-01), Fung et al.

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