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- Path: sparky!uunet!ogicse!news.u.washington.edu!carson.u.washington.edu!whit
- From: whit@carson.u.washington.edu (John Whitmore)
- Newsgroups: sci.electronics
- Subject: Re: Why etch? Is copper deposition possible?
- Message-ID: <1j04j9INN505@shelley.u.washington.edu>
- Date: 13 Jan 93 04:08:09 GMT
- Article-I.D.: shelley.1j04j9INN505
- References: <C0nqAB.55B@gantz.bowlgreen.oh.us>
- Organization: University of Washington, Seattle
- Lines: 22
- NNTP-Posting-Host: carson.u.washington.edu
-
- In article <C0nqAB.55B@gantz.bowlgreen.oh.us> gantzm@gantz.bowlgreen.oh.us (Michael L. Gantz) writes:
- >I have been reading all the articles concerning the etching of circuit
- >boards, something I have a great need to do. And they all assume that
- >one would be etching the copper off of the board. Is it possible for
- >the home hobbyist to devise a system to deposit copper onto blank
- >boards?
-
- There are commercial processes that deposit copper (and
- some really fancy ones, that use a laser and chemical pyrolysis, to
- literally draw wires with a light pen), but these are generally
- unsatisfactory.
-
- The plated-on copper coating is brittle and subject to
- cracking (not desirable features), so glued-on copper sheet and
- subtractive processes are preferred. There ARE some plating
- baths that don't have the cracking problem, but these are not
- suitable for home use (and aren't easy to use commercially, either).
-
- Plated-through holes are the only additive copper processing
- that most fabricators can reliably employ.
-
- John Whitmore
-