Electronics Forum | Fri Jun 03 15:18:04 EDT 2005 | mmjm_1099
Hello, I was wondering about specs on SMT stencil ordering. I am looking to make some sort of template for aperature layout of some parts. I was wondering some issues that you have all came across or made to change to better suit your boards. For ins
Electronics Forum | Fri Jun 17 10:47:48 EDT 2005 | davef
Doug: We agree that imm tin can be easily stripped and reapplied. Do you order imm tin as bright/ dull? Is bright/dull a function of who the fabricator lisences the process? Er wha? Electroplate tin can be either matt or bright. It is different
Electronics Forum | Thu Jul 14 19:12:40 EDT 2005 | sync40
Hi. In the past years I had made dozens of PCBs but now I am trying to get a professional finishing on them. The main problem is oxidation of the copper traces. Basically I use the silkscreen method to make the pattern in both layers and then etch. L
Electronics Forum | Fri Oct 07 09:18:39 EDT 2005 | russ
If you're using non-lead free parts then you don't have a pbfree assembly so why worry about marking it anyway? We apply this artwork after the assembly has been completely engineered for lead free. Artwork can be covered up with mask or whatever if
Electronics Forum | Thu Oct 27 07:34:10 EDT 2005 | cyber_wolf
We just bought a new/used ultrasonic stencil cleaner. The solvent we use is Zestron Vigon SC200. We currently number our stencil frames with sharpies. The Zestron eats the sharpie markings off. I have also tried acrylic paint markers.....eats the pa
Electronics Forum | Wed Mar 15 04:32:14 EST 2006 | rlackey
Hi Brad, I don't know if this helps, but we had a policy of not accepting x-outs on rigids, and of max 10% per panel on Flexy boards (as long as the local fiducial was blacked out for the bad board) I'm always suspicious of x-outs as it points to pr
Electronics Forum | Fri Jul 28 19:55:31 EDT 2006 | scott
I would agree for a bare board house, are you NUTS? Look what happend to McCurdey's high tech line in S. Cal., go chewed up and spit out by China... Plating, etching, environmental issues, regulations, lack of people who like doing that work... endle
Electronics Forum | Thu Jan 25 04:55:08 EST 2007 | greg york
Strange as we have had huge problems with Silver in Many different Assembly houses. Mainly with Nitric Acid based Silvers causing blow holes, non wetting and even the Nitric etching away the tracks on fine boards. It has been one of the main problem
Electronics Forum | Tue Feb 13 11:20:59 EST 2007 | cevans MPM printer specialist
Off contact is generaly less favourable than on contact printing. print height becomes a issue towards the edge or foil clamps. If you Had little or no issues with your previous board vendor re-check your specs you supplied to your current vendor. If
Electronics Forum | Wed Mar 07 12:57:15 EST 2007 | John S.
Hover Davis makes a feeder that can be fitted to many pick and place machines. Runs about 7k. I've seen print on demand feeders at tradeshows for about 30k. If you've got enough volume, you could also laser etch. There's more capital involved, bu
