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From: jeffr@sri-spam.istc.sri.com (Jeff Rininger)
Newsgroups: sci.electronics
Subject: Re: PC board photo etching kits
Message-ID: <10537@sri-spam.istc.sri.com>
Date: Mon, 6-Jul-87 11:13:59 EDT
Article-I.D.: sri-spam.10537
Posted: Mon Jul  6 11:13:59 1987
Date-Received: Tue, 7-Jul-87 03:38:56 EDT
References: <2392@uwmcsd1.UUCP> <10524@sri-spam.istc.sri.com> <2409@uwmcsd1.UUCP>
Reply-To: jeffr@sri-spam.UUCP (Jeff Rininger)
Organization: SRI International, Menlo Park
Lines: 22
Keywords: PC boards, Stahler Mills
Summary: Spray thin; better to use Stahler Mills

In article <2409@uwmcsd1.UUCP> neighbor@csd4.milw.wisc.edu.UUCP (Jeffrey Alan Ding) writes:
>In article <10524@sri-spam.istc.sri.com> jeffr@sri-spam.UUCP (Jeff Rininger) writes:
>>	I've had problems with sensitizing my own boards; the problems
>>	were caused by spraying the photo-resist on the board too thick.
>>
>Too thick??  Is one coat too thick?  I tried it with 1 coat, 2 coats, and even
	         ^^^^^^^^
	One coat COULD be too thick; I had the best results with one
	very thin coat.
>
>
>>	For one-offs, why not use Stahler mills (which I've hyped on this
>>	newsgroup before) and spare yourself all the etching hassle ?
>
>What is Stahler mills????  I've never heard of that before... [. . . .]

	Stahler mills are a kind of pad cutter combined with a drill,
	such that in one operation you cut an isolated component pad and
	drill a hole.  The uncut area of the PC board serves as a ground
	plane, and you solder the components to the pads and wire the
	board on the unclad side using the component leads.  Fast and neat.
	Stahler is in San Jose: 408-352-4219.