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July 1998

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Subject:
Re: Oxidized HASL boards
From:
Lenny Kurup <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 10 Jul 1998 12:25:24 -0400
Content-Type:
TEXT/PLAIN
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TEXT/PLAIN (57 lines) 
Thomas,

Try a cleaning solution of 5 g/l of Thiourea in 5% sulphuric.
Or some manufacturers provide a solder cleaner.

Lk


On Wed, 8 Jul 1998, Thomas Jacob wrote:

> Hi Technetters
>
> We have a full rack of rigid polyimide boards with pale, oxidized
> surface onto the HASL-solder pads.
> How can we remove the oxide layer whithout scrapping the boards?
> Is there an economical way to run thru a cleaning machine?
> I don't want to heat up the boards to reflow the solder...
>
> Your help will be highly appreciated
>
> Thomas Jacob
>
> Phone:  0041-1-306 24 07 (direct)
> Fax:    0041-1-306 36 40
> e-mail: [log in to unmask]
> Internet: http://www.dyconex.com
>
> DYCONEX LTD.
> Unterwerkstrasse 3
> CH-8052 Zurich
> Switzerland
>
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