Invention Grant
- Patent Title: Multiple-port SRAM device
- Patent Title (中): 多端口SRAM器件
-
Application No.: US12816961Application Date: 2010-06-16
-
Publication No.: US08605491B2Publication Date: 2013-12-10
- Inventor: Jhon Jhy Liaw
- Applicant: Jhon Jhy Liaw
- 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

Abstract:
A static random access memory (SRAM) cell having a dedicated read port separated from a write port comprises a first and a second bit-line placed in parallel forming a complimentary bit-line pair for the dedicated read port, a first and second metal line adjacently flanking in both side of and in parallel to the first bit-line, the first and second metal line being formed in the same metal layer as the first bit-line and having a first and second predetermined distance to the first bit-line, respectively, and a third and fourth metal line adjacently flanking in both side of and in parallel to the second bit-line, the third and fourth metal line being formed in the same metal layer as the second bit-line and having a third and fourth predetermined distance to the second bit-line, respectively, wherein the first predetermined distance is equal to the third distance and the second predetermined distance is equal to the fourth distance for keeping the first and second bit-lines having balanced capacitance loading.
Public/Granted literature
- US20100254210A1 Multiple-Port SRAM Device Public/Granted day:2010-10-07
Information query