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- Newsgroups: sci.electronics
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!caen!hellgate.utah.edu!csn!tpsrd!tps.COM!thomasd
- From: thomasd@tps.COM (Thomas W. Day)
- Subject: Re: PC BOARD ETCHING QUESTIO
- Message-ID: <thomasd.70.726863499@tps.COM>
- Sender: news@tps.com (News Software)
- Organization: TPS
- References: <1993Jan7.142018.12112@phx.mcd.mot.com> <C0Iwtw.JpK@news.iastate.edu> <1993Jan10.225053.28590@phx.mcd.mot.com> <76416@apple.apple.COM>
- Date: Tue, 12 Jan 1993 18:31:39 GMT
- Lines: 21
-
- In article <76416@apple.apple.COM> apn@Apple.COM (Alex Novickis) writes:
-
- John Schuch) writes:>>I, to, have had this problem once in a while but have
- found most >>cameramen pretty darn accurate. Another thing I ALWAYS do is
- include>>a rule in the artwork. Something like this:
- >>
- >> |----|----|----|----|----|----|
- >> | |
- >> |<-------- 3 INCHES --------->|
- >> | |
- >>
- >>
- >With current laser photoplotting technology, WHY ?? whould you want to
- >do reductions ?? LP's can generate things much finer than you can
- >ever hope to etch.... I think that's about 4 mil traces with 4 mil
- >seperations. And it usually costs me under 10$ for a 10x10" film (OK,
- >well I do need several of them... but still)
-
- I guess I just assumed we were talking about taped PCBs. There are a lot of
- good reasons for taping 4X and going for reductions on the PMT, but those
- reasons probably vanish if you are sending a file to the repro company.
-