Invention Grant
- Patent Title: Methods for testing unprogrammed OTP memory
- Patent Title (中): 测试未编程OTP内存的方法
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Application No.: US13412500Application Date: 2012-03-05
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Publication No.: US08767433B2Publication Date: 2014-07-01
- Inventor: Wlodek Kurjanowicz , Steven Smith
- Applicant: Wlodek Kurjanowicz , Steven Smith
- Applicant Address: CA Ottawa
- Assignee: Sidense Corp.
- Current Assignee: Sidense Corp.
- Current Assignee Address: CA Ottawa
- Agency: Borden Ladner Gervais LLP
- Agent Shin Hung
- Main IPC: G11C17/00
- IPC: G11C17/00

Abstract:
Methods for testing unprogrammed single transistor and two transistor anti-fuse memory cells include testing for connections of the cells to a bitline by comparing a voltage characteristic of a bitline connected to the cell under test to a reference bitline having a predetermined voltage characteristic. Some methods can use test cells having an access transistor identically configured to the access transistor of a normal memory cell, but omitting the anti-fuse device found in the normal memory cell, for testing the presence of a connection of the normal memory cell to the bitline. Such a test cell can be used in a further test for determining the level of capacitive coupling of the wordline voltage to the bitlines relative to that of a normal memory cell under test.
Public/Granted literature
- US20120182782A1 METHODS FOR TESTING UNPROGRAMMED OTP MEMORY Public/Granted day:2012-07-19
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