home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.lsi.testing
- Path: sparky!uunet!paladin.american.edu!gatech!concert!unccsun.uncc.edu!ws130!makki
- From: makki@uncc.edu (Rafic Z Makki)
- Subject: Re: IDDQ testing, how reliable is it?
- Message-ID: <C17o4r.7o8@unccsun.uncc.edu>
- Sender: usenet@unccsun.uncc.edu
- Nntp-Posting-Host: ws130.uncc.edu
- Reply-To: makki@uncc.edu
- Organization: University of NC at Charlotte
- References: <BJORN.B.LARSEN.93Jan20114904@engels.delab.sintef.no>
- Date: Thu, 21 Jan 1993 15:53:14 GMT
- Lines: 15
-
- Bjorn, the points that you make are indeed valid. However, it is still
- early to disgard IDDQ for a number of reasons. First, a number of researchers
- such as Maly and Hawkins have shown IDDQ to be effective when used as an additional screen
- and a good way to augment stuck-at and functional testing. Second, one cannot look at
- any one test method in isolation for all levels of the maufacturing process from
- die level to chip level to card level. There are many different test activities and, if used
- properly, IDDQ can be effective in helping to assure higher quality levels. Finally,
- IDDQ is still far from being a mature test method and much research remains to be done
- in areas such as designing current-testable circuits, combining IDDQ with boundary scan, etc...
-
- Bjorn, thanks for your comments. I enjoyed thinking about the questions that you posed.
-
-
-
- -Rafic Makki
-