Ken

It depends on the kind of component/device you want to trim.  The big
companies in the US are ESI and GSI (General Scanning...it may have changed
names a bit when it aquired Lumonics...maybe to GLSI).  They control some
90% of the US market.  The ESI/GSI markets tend to separate depending on the
commercial application.  This probably means each has their own strengths
and weaknesses.  The GSI systems tend to be faster/cheaper for the general
products, but at cost of measurement values.  But GSI is very good at what
they do.  ESI systems tend to be slower, but not in all cases, especially
with active devices.  ESI has a patented 1.3um laser that does not interfere
with Si devices during trimming.  But advantages come with a high cost.
Uptime is a significant issue, depending on the model.

So check them both out.

Carey


-----Original Message-----
From: Ken Fong <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Tuesday, February 08, 2000 5:39 PM
Subject: [TN] Laser trimming


>     Technetters,
>
>     Could anyone advise any information(companies, websites, or articles)
>     regarding the process, equipment, pros and cons of using laser
>     trimming in electronic products? Thanks.
>
>     Regards,
>     KenF, Feb 9,00
>
>##############################################################
>TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
>##############################################################
>To subscribe/unsubscribe, send a message to [log in to unmask] with following
text in
>the body:
>To subscribe:   SUBSCRIBE TECHNET <your full name>
>To unsubscribe:   SIGNOFF TECHNET
>##############################################################
>Please visit IPC web site (http://www.ipc.org/html/forum.htm) for
additional
>information.
>If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
>847-509-9700 ext.5365
>##############################################################
>

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################