SRAM cell layout structure and devices therefrom

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United States of America Patent

PATENT NO 9424385
SERIAL NO

14511487

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Abstract

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A method for modifying a design of an integrated circuit includes obtaining design layout data for the integrated circuit and selecting at least one SRAM cell in the integrated circuit to utilize enhanced body effect (EBE) transistors comprising a substantially undoped channel layer and a highly doped screening region beneath the channel layer. The method also includes extracting, from the design layout, NMOS active area patterns and PMOS active area patterns associated with the SRAM cell to define an EBE NMOS active area layout and a EBE PMOS active area layout. The method further includes adjusting the EBE NMOS active area layout to reduce a width of at least pull-down devices in the SRAM cell and altering a gate layer layout in the design layout data such that a length of pull-up devices in the at least one SRAM and a length of the pull-down devices are substantially equal.

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Patent Owner(s)

Patent OwnerAddress
MIE FUJITSU SEMICONDUCTOR LIMITED2000 MIZONO TADO-CHO KUWANA MIE 511-0118

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Clark, Lawrence T Phoenix, US 139 2030
Kidd, David A San Jose, US 27 290
Tien, George Cupertino, US 2 7

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