Michael,

My suggestion will be that you use water soluble tape to protect your PTH pattern at
the bottom side. The tape dissolves during water wash cycle of cleaning. Give me a call
at the number listed below for more details about the process and how tape can be used.

I used it successfully at IBM few years back ( now I am retired and building a web site
with PCB process information). Will be happy to help.

"McMonagle, Michael R." wrote:

>         I have an application where I need to mask off a through-hole SIP
> through wave solder. Washable liquid mask is getting on closely adjacent
> bottom-side SMT components, and I can't justify an automated dispenser with
> current volumes. I remember a company back in the days of when through-hole
> was king (waaaay back there) that made high-temp filled plastic masking
> thingamajigs that fit standard DIP/SIP patterns. You just dropped them in
> the hole pattern before wave, then removed and reused them after wave.
> Anybody out there know what I'm talking about, and who makes them?
>
> Mike McMonagle
> PCA Process Engineering Supervisor
> K*Tec Electronics
> 1111 Gillingham Lane
> Sugar Land, TX  77478
> (281) 243-5639 Phone
> (281) 243-5539 Fax
> [log in to unmask]
>
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--
____________________________________
Regards,
Pratap Singh

Tel./Fax: 512-255-6820,
e-mail: [log in to unmask] or [log in to unmask]

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