Michael,

If the spacing is so tight, then you can fab some 'dummy SIP/DIP' with titanium pins
(to fit 035 vias) plug them in , wave solder and then remove prior to cleaning.
Titanium does not wet with solder. A snug fit will keep vias  free of solder during
wave solder. This was also tried and found to be effective while doing process
development at the Big Blue.

"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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