公开(公告)号：US10762951B1

公开(公告)日：2020-09-01

申请号：US16455783

申请日：2019-06-28

Applicant: UNITED MICROELECTRONICS CORP.

Inventor： Chih-Wei Tsai ,  Tsan-Tang Chen ,  Chung-Cheng Tsai ,  Yen-Hsueh Huang ,  Chang-Ting Lo ,  Chun-Yen Tseng ,  Yu-Tse Kuo

IPC: G11C11/412 ,  G11C11/419 ,  G11C11/418

Abstract: An SRAM device includes a memory cell and a keeper circuit. The memory cell is formed in an active area and coupled to a first bit line and a second bit line. The keeper circuit is formed in the active area and configured to charge the second bit line when the first bit line is at a first voltage level and the second bit line is at a second voltage level or charge the first bit line when the second bit line is at the first voltage level and the first bit line is at the second voltage level, wherein the second voltage level is higher than the first voltage level.