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Subject:	Re: "rolled solder"
From:	Don Vischulis <[log in to unmask]>
Reply To:	TechNet Mail Forum.
Date:	Wed, 12 Nov 1997 22:04:39 -0600
Content-Type:	text/plain
Parts/Attachments:	text/plain (49 lines)

Cheltan:

The only process of which I am aware was used on single sided boards before HASL was commercially viable.  Another name for
that process was "hot roll tinning".  The machine applied a solder coating to bare copper circuitry by transferring the solder
from a resevoir of molted solder to the surface of the board via a heated roller.  The process is similar to roller coating.

The concerns with the process include coating uniformity and hole plugging.  (At that time, 0.035" holes were considered
small, and 0.025" holes were seldom used on commercial boards.)

Don Vischulis

Chetan Mehta wrote:

> Technetters,
>
>                 Could anyone shed some light ont the term "rolled
> solder" finish on pwb's?  I have had a couple of people ask me about it
> and am curious to find out more.  Any comments would be appreciated.
> Thanks .
>
> CHET.
>
>                                                   ------------------------------------------------------------------------
>
>   Chetan Mehta <[log in to unmask]>
>   Eagle Circuits
>
>   Chetan Mehta
>   Eagle Circuits      <[log in to unmask]>
>   10820 Sanden Drive  Work: 214 349-0288
>   Dallas              Fax: 214 349-1210
>   Texas               Netscape Conference Address
>   75238               Netscape Conference DLS Server
>   Additional Information:
>   Last Name     Mehta
>   First Name    Chetan

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