Electronics Forum: pc board (Page 1 of 34)

pc board defects

Electronics Forum | Sat Sep 14 20:42:48 EDT 2002 | kenbliss

Hi Scott Thanks for your comments, you stated "The highest attributer was clogging apertures in fine pitch, resistor networks, and BGA, Micro BGA areas" was this do just to the size of the aperture or bad or old paste or debris from inadequate clean

pc board defects

Electronics Forum | Fri Sep 13 13:51:38 EDT 2002 | kenbliss

I recently saw an ad in a major trade magazine that stated: �about 60%of all printed circuit board manufacturing defects are due to stencil printing� I would like to hear comments from people that are running SMT lines, is this fact and if it is, w

pc board defects

Electronics Forum | Sun Sep 15 08:35:42 EDT 2002 | davef

That 60+% print defects number has been bantied around for so long in the electronic assembly business for so long that people believe that it's true. One starting point for this myth and lore is: "Where Quality Is Lost On SMT Boards" C Mangin, 'Cir

pc board defects

Electronics Forum | Sun Sep 15 15:08:00 EDT 2002 | jersbo

My 2 cents... Screen printing may very well have a leg up on deciding SMT defects... however if you pay attention to your stencil (aperture size ratio etc..) and inspect your prints... I believe its a much lesser number... (paste MFG also plays a ro

pc board defects

Electronics Forum | Sat Sep 14 12:24:44 EDT 2002 | scottefiske

We need to remember here that as printer manufacturers were enhancing their product lines, miniaturization was quickly being developed in the background. In the last 2 years I was involved in developing and conducting a D.O.E./F.M.E.A in determining

pc board defects

Electronics Forum | Fri Sep 13 18:58:12 EDT 2002 | slthomas

I can't give you itemized values for each defect category because we don't ask operators to distinguish between them, and we haven't done any serious research to do so either. I do wonder this, though. I read data somewhere from 14 years ago statin

pc design/layout software

Electronics Forum | Thu Jan 14 14:41:50 EST 1999 | Bill Mordarski

I need to buy modestly priced pc layout software for very infrequent use for very simple microwave and analog surface mount multi-layer boards. Can any one recommend a software package which is easy to learn, runs on a Windows PC and interfaces with

Re: pc design/layout software

Electronics Forum | Thu Jan 14 15:03:57 EST 1999 | Earl Moon

| I need to buy modestly priced pc layout software for very infrequent use for very simple microwave and analog surface mount multi-layer boards. Can any one recommend a software package which is easy to learn, runs on a Windows PC and interfaces wit

Re: pc design/layout software

Electronics Forum | Thu Jan 14 15:26:25 EST 1999 | Earl Moon

| I need to buy modestly priced pc layout software for very infrequent use for very simple microwave and analog surface mount multi-layer boards. Can any one recommend a software package which is easy to learn, runs on a Windows PC and interfaces wit

Re: pc design/layout software

Electronics Forum | Thu Jan 14 23:43:09 EST 1999 | Chris G.

| I need to buy modestly priced pc layout software for very infrequent use for very simple microwave and analog surface mount multi-layer boards. Can any one recommend a software package which is easy to learn, runs on a Windows PC and interfaces wit

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