Patent ID: 7671389

Claim:
A static random access memory (SRAM) device, comprising: a semiconductor substrate having at least one cell active region in a cell array region and a plurality of peripheral active regions in a peripheral circuit region, wherein the cell array region further comprises first and second body regions sequentially stacked above the at least one cell active region, and wherein the first and second body regions have the same conductivity type as the at least one cell active region; a plurality of stacked cell gate patterns in the cell array region, wherein one of the cell gate patterns is formed on the at least one cell active region, and the remaining cell gate patterns are formed on the first and second body regions, respectively; a plurality of peripheral gate patterns disposed on the peripheral active regions in the peripheral circuit region; metal silicide layers disposed on at least one portion of the peripheral gate patterns and on portions of the semiconductor substrate near the peripheral gate patterns, respectively; buried layer patterns disposed on the peripheral gate patterns and on at least a portion of the metal silicide layers and the portions of the semiconductor substrate near the peripheral gate patterns; an etch stop layer and a protective interlayer-insulating layer disposed around the peripheral gate patterns and on the cell array region, wherein the protective interlayer-insulating layer and the etch stop layer surround the buried layer patterns; source and drain regions disposed in the at least one cell active region and the first and second body regions, wherein the source and drain regions overlap the cell gate patterns; a first landing pad disposed between the at least one cell active region and the first body region in the cell array region, and a second landing pad disposed between the first body region and the second body region in the cell array region, wherein the first landing pad is in contact with at least one of the source and/or drain regions in the at least one cell active region, and wherein the second landing pad is in contact with at least one of the source and/or drain regions in the first body region.