Patent ID: 8315086

Claim:
An integrated circuit containing an SRAM array, comprising: a substrate of said integrated circuit; an SRAM cell row disposed in said SRAM array, said SRAM cell row containing a plurality SRAM cells; a strap row disposed in said SRAM array and located adjacent to said SRAM cell row; a layer of field oxide disposed in a top surface of said SRAM array; a first polarity well of a first conductivity type disposed in said SRAM array, said first polarity well including: a first columnar region and a second columnar region, said first and second columnar regions extending through said SRAM cell row and said strap row; and a tap connecting region located in said strap row, said tap connecting region connecting said first and second columnar regions; a second polarity well of a second conductivity type disposed in said SRAM cell row between said first and second columnar regions, said second conductivity type being opposite from said first conductivity type; a well tap active area located in said strap row and formed by an opening in said layer of field oxide, so that at least a portion of said well tap active area is located in said tap connecting region; a tap layer disposed in said well tap active area, said tap layer having said second conductivity type, so as to provide an electrical connection to said first and second columnar regions of said first polarity well through said tap connecting region; and a well contact plug located on a top surface of said substrate on said tap layer in said well tap active area, so that a combination of said tap connecting region, said tap layer in said well tap active area, and said well contact plug forms a well contact structure.