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Subject:	Re: Wash-Away Spacers
From:	Keith Calhoun <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Wed, 29 Jan 2003 13:52:11 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (41 lines)

We use them frequently and have no problems with them dissolving completely in our Westek aqueous cleaner.

"Kane, Joseph" wrote:

> Anyone had success using wash-away spacers during wave-soldering, then
> removing them by aqueous cleaning?  We're looking at them mostly to
> control standoff of transistor cans and vertically-mounted resistors.
>
> Looking at the Bivar catalog, spacers come in two types, normal and
> "effervescent", which dissolve more quickly.
>
> Do they wash away completely?  Leave any residue that affects conformal
> coat adhesion?  Any problems with the materials reacting with the wash
> chemistry, either saponifier or alcohol based?
>
> Joe Kane
> BAE SYSTEMS Controls
> Johnson City, NY
>
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