Invention Grant
- Patent Title: Multiple-port SRAM device
- Patent Title (中): 多端口SRAM器件
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Application No.: US14074595Application Date: 2013-11-07
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Publication No.: US08934287B2Publication Date: 2015-01-13
- Inventor: Jhon Jhy Liaw
- Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
- Applicant Address: TW Hsin-Chu
- Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee Address: TW Hsin-Chu
- Agency: K&L Gates LLP
- Main IPC: G11C11/41
- IPC: G11C11/41 ; G11C11/412 ; G11C5/06 ; G11C7/02 ; G11C7/18 ; G11C8/14 ; G11C8/16 ; H01L27/11 ; H01L27/02

Abstract:
A method for providing a SRAM cell having a dedicated read port separated from a write port includes providing a first and a second bit-line placed in parallel forming a complementary bit-line pair for the dedicated read port, and providing a third and a fourth bit-line placed in parallel forming a complementary bit-line pair for the write port. The method further includes providing a positive voltage supply line disposed between a first and a second ground line placed in parallel, providing a first and a second metal line adjacently flanking and in parallel to the first bit-line, and providing a third and a fourth metal line adjacently flanking and in parallel to the second bit-line to provide a new SRAM cell structure having a balanced read and write operation speed and an improved noise margin.
Public/Granted literature
- US20140063919A1 MULTIPLE-PORT SRAM DEVICE Public/Granted day:2014-03-06
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