I
don't know about this presentation but I do recall that FETs in general are
supposed to be subject to gradual degradation. It has been awhile but as I
remember a manufacturer ( which one I don't remember ) had a caution in their
data sheets about transient protection. This is not ESD but would be a similar
effect. The transient level they warned about were fairly high but in some
applications high level transient are common. I am not an expert in this field
and am relying on memory so don't take this as fact.
Hi Alex,
I have like you
always assumed it to be either or - If hit hard enough
device failure is
catastrophic. But small discharges can also cause
degradation.
Some
time ago (a long time ago !) I seem to remember 3M used to make a sales
presentation where they
gradually destroyed a Mosfet by handing sample
devices around a group of people, as the device was handed from person to
person the gate leakage current was measured after each handling. At
each test
the gate leakage current gradually increased up to and beyond its
spec, then at some point the gate was demonstrated to have failed
completely.
Does anyone else remember this type of
presentation?
Kind regards
Martyn Gaudion
Polar
Instruments
www.polarinstruments.com
T: +44 1481
253081
M: +44 7710 522 748
F: +44 1481 252476
E:
[log in to unmask]
At 04:44 PM 02/10/03 -0600, you
wrote:
Hi all. Simple question yet I havent
read the definitive answer. Is damage from ESD cumulative?
Reason I ask is the following statement I came across in a GaAs MMIC
article.
Other studies have also concluded that damage
from repeated exposure to an ESD level is not cumulative and that
noncatastrophic damage does not degrade device lifetime. The statement
references the EOS/ESD Symposium Proceedings 1988.
Ive always preached that ESD damage is
cumulative.
Alex ShockedKrstic
NovAtel Inc.
---------------------------------------------------
Technet Mail
List provided as a free service by IPC using LISTSERV 1.8e
To
unsubscribe, send a message to [log in to unmask] with following text in the
BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or
(re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet
NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send
e-mail to [log in to unmask]: SET Technet Digest
Search the archives of
previous posts at: http://listserv.ipc.org/archives
Please visit IPC
web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for
additional information, or contact Keach Sasamori at [log in to unmask] or
847-509-9700
ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail
List provided as a free service by IPC using LISTSERV 1.8e
To unsubscribe,
send a message to [log in to unmask] with following text in the BODY (NOT the
subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery
of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To
receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]:
SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information,
or contact Keach Sasamori at [log in to unmask] or 847-509-9700
ext.5315
-----------------------------------------------------