Invention Grant
- Patent Title: Dual-port SRAM cell structure with vertical devices
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Application No.: US14671587Application Date: 2015-03-27
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Publication No.: US09646973B2Publication Date: 2017-05-09
- Inventor: Jhon Jhy Liaw
- Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.
- Applicant Address: TW Hsin-Chu
- Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee Address: TW Hsin-Chu
- Agency: Slater Matsil, LLP
- Main IPC: H01L27/11
- IPC: H01L27/11 ; H01L29/78 ; H01L29/66 ; H01L21/768

Abstract:
Dual-Port SRAM cells are described. In an embodiment, a cell includes first and second pull-down, first and second pull-up, and first through fourth pass-gate transistors. Each transistor includes a first source/drain region in an active area, a channel extending above the active area, and a second source/drain region above the channel. First source/drain regions of pull-down transistors are electrically coupled through a first active area. First source/drain regions of pull-up transistors are electrically coupled through a second active area. A first, and a second, gate electrode is around channels of the first, and second, pull-down and pull-up transistors, respectively. Second source/drain regions of the first pull-down, first pull-up, and first and third pass-gate transistors are electrically coupled to the second gate electrode. Second source/drain regions of the second pull-down, second pull-up, and second and fourth pass-gate transistors are electrically coupled to the first gate electrode.
Public/Granted literature
- US20160284712A1 DUAL-PORT SRAM CELL STRUCTURE WITH VERTICAL DEVICES Public/Granted day:2016-09-29
Information query
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