Daan

ESD? On bare boards? So what?

Brian

"d. terstegge" wrote:

> >From one of my stencil vendors I heard that ESD is a much greater concern when using polyimide stencils. For that reason he doesn't sell them anymore, in spite of the advantages of polyimide.
>
> Bye,
>
> Daan Terstegge
> Unclassified mail
> Personal website: http://surf.to/smtinfo
>
> >>> Murugan Vasudevan <[log in to unmask]> 02/27 8:29 pm >>>
> Hi technetters..
> here's an early bird question for this week...this one
> is regarding stencil wear. well, i have read in some
> literature that a fully hard laser-etched stainless
> steel stencil can last for more than a 100K cycles
> without ay problem. Now, the problem is, we are
> getting into this business of using a polyimide
> stencil. it is giving great deposits, good release
> characteristics, outperforms the metal stencil for our
> application, etc. etc. BUT...the one thing that
> concerns most of us is .."well, everything is okay
> NOW...but what might happen lets say 50K cycles
> after!?"..and i was wondering if anyone in this group
> has any experience with using such a stencil?" if so,
> i would definitely be interested in knowing how is it
> behaving on a long term basis..
>
> ##############################################################
> 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 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 1.8c
##############################################################
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 Keach Sasamori at [log in to unmask] or
847-509-9700 ext.5315
##############################################################