Invention Grant
- Patent Title: Semiconductor memory and system
- Patent Title (中): 半导体存储器和系统
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Application No.: US12755002Application Date: 2010-04-06
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Publication No.: US08243500B2Publication Date: 2012-08-14
- Inventor: Yasumitsu Sakai
- Applicant: Yasumitsu Sakai
- Applicant Address: JP Yokohama
- Assignee: Fujitsu Semiconductor Limited
- Current Assignee: Fujitsu Semiconductor Limited
- Current Assignee Address: JP Yokohama
- Agency: Arent Fox LLP
- Priority: JP2009-093990 20090408
- Main IPC: G11C11/00
- IPC: G11C11/00

Abstract:
A semiconductor memory has a short transistor coupling complementary storage nodes of a latch circuit of a memory cell. A transfer transistor and the short transistor have a diffusion layer in common coupled to one of the storage nodes. The short transistor and a driver transistor have a diffusion layer in common coupled to the other storage node. The transfer transistor, the short transistor, and the driver transistor are continuously disposed via the diffusion layers in common, and thereby, variation of characteristics of the transfer transistor can be prevented. Accordingly, it may be possible to prevent that current supplying ability of the transfer transistor changes depending on a layout in the memory cell, and that an operation margin of the memory cell deteriorates.
Public/Granted literature
- US20100259972A1 SEMICONDUCTOR MEMORY AND SYSTEM Public/Granted day:2010-10-14
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