- Patent Title: Ultra dense and stable 4T SRAM cell design having NFETs and PFETs
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Application No.: US15849367Application Date: 2017-12-20
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Publication No.: US10381068B2Publication Date: 2019-08-13
- Inventor: Myung-Hee Na , Robert Wong , Jens Haetty , Sean Burns
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Michael J. Chang, LLC
- Agent Vazken Alexanian
- Main IPC: G11C11/412
- IPC: G11C11/412 ; H01L27/11 ; H01L27/088 ; G11C11/419 ; H01L27/118

Abstract:
Ultra dense and stable 4T SRAM designs are provided. In one aspect, a 4T SRAM bitcell includes: two NFETs cross-coupled with two PFETs, wherein the NFETs are both connected directly to a word line, wherein a first one of the PFETs is connected to a first bit line via a first one of the NFETs and a second one of the PFETs is connected to a second bit line via a second one of the NFETs, and wherein the PFETs are each separately connected to ground. An SRAM device including the present 4T SRAM bitcell as well as a method of operating the SRAM device are also provided.
Public/Granted literature
- US20190189195A1 Ultra Dense and Stable 4T SRAM Cell Design Having Nfets And Pfets Public/Granted day:2019-06-20
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