Invention Grant
- Patent Title: Semiconductor memory device
- Patent Title (中): 半导体存储器件
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Application No.: US12436285Application Date: 2009-05-06
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Publication No.: US08014213B2Publication Date: 2011-09-06
- Inventor: Junji Yamada
- Applicant: Junji Yamada
- Applicant Address: JP Tokyo
- Assignee: Elpida Memory, Inc.
- Current Assignee: Elpida Memory, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Young & Thompson
- Priority: JP2008-127706 20080514
- Main IPC: G11C7/10
- IPC: G11C7/10

Abstract:
A semiconductor memory device is constituted of a plurality of fuses (or anti-fuses) used for internal voltage adjustment or timing adjustment after manufacturing, a selector for sequentially selecting the fuses, and a single-direction latch circuit for latching a fuse breakdown determination result which is produced by determining whether or not each fuse selected by the selector is broken down and which is varied in a single direction from the low level to the high level or in a single direction from the high level to the low level. The semiconductor memory device allows the fuse breakdown determination to progress with a high reliability by use of a relatively small chip area and to cope with a failure in which one or more fuses are accidentally short-circuited to an unwanted potential.
Public/Granted literature
- US20090285033A1 SEMICONDUCTOR MEMORY DEVICE Public/Granted day:2009-11-19
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