Invention Grant
- Patent Title: Flying and twisted bit line architecture for dual-port static random-access memory (DP SRAM)
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Application No.: US16583060Application Date: 2019-09-25
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Publication No.: US10790015B2Publication Date: 2020-09-29
- Inventor: Sahil Preet Singh , Jung-Hsuan Chen , Yen-Huei Chen , Avinash Chander , Albert Ying
- Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
- Applicant Address: TW Hsinchu
- Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee Address: TW Hsinchu
- Agency: Eschweiler & Potashnik, LLC
- Main IPC: G11C5/06
- IPC: G11C5/06 ; G11C11/419 ; G11C7/10 ; G11C8/16 ; G11C11/412 ; H01L49/02 ; H01L23/522 ; H01L23/528 ; H01L27/11

Abstract:
A bit line architecture for dual-port static random-access memory (DP SRAM) is provided. An array of memory cells is arranged in rows and columns, and comprises a first subarray and a second subarray. A first pair of complementary bit lines (CBLs) extends along a column, from a first side of the array, and terminates between the first and second subarrays. A second pair of CBLs extends from the first side of the array, along the column, to a second side of the array. The CBLs of the second pair of CBLs have stepped profiles between the first and second subarrays. A third pair of CBLs and a fourth pair of CBLs extend along the column. The first and third pairs of CBLs electrically couple to memory cells in the first subarray, and the second and fourth pairs of CBLs electrically couple to memory cells in the second subarray.
Public/Granted literature
- US20200020392A1 FLYING AND TWISTED BIT LINE ARCHITECTURE FOR DUAL-PORT STATIC RANDOM-ACCESS MEMORY (DP SRAM) Public/Granted day:2020-01-16
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