Electronics Forum: stencil (Page 505 of 541)

Re: BGA collapse during reflow

Electronics Forum | Wed Jul 14 14:05:52 EDT 1999 | KT

I need some advice concerning reflow of a BGA-292. Since I am not ready to change my entire process to no-clean, I decided to place the lone BGA-292 on a proto run using our BGA re-work station. The pcb is a moderately dense, single-sided, 8-laye

Re: Through holes in SMT pads

Electronics Forum | Tue Jul 06 16:44:14 EDT 1999 | John Thorup

Is anyone aware of some guidelines regarding through-hole in SMT pads? One of our designers wants to add through-hole leads in some SMT pads for an inductor. The size of the hole is 0.032 inches and takes-up approximately 25% of the pad area. Th

Off Pad Printing

Electronics Forum | Mon Jun 28 15:50:22 EDT 1999 | JohnW

Hey there gang, how's it going ? Anyway's here's my probelm, got a new product to build double sided reflow, lot's of so20's and PLcc's 1206's, 0805's the usual stuff. Probelm is all the pad spacing of the 1206's are too big, my component's are only

Re: Off Pad Printing

Electronics Forum | Mon Jun 28 16:18:44 EDT 1999 | Earl Moon

Hey there gang, how's it going ? Anyway's here's my probelm, got a new product to build double sided reflow, lot's of so20's and PLcc's 1206's, 0805's the usual stuff. Probelm is all the pad spacing of the 1206's are too big, my component's ar

Re: Off Pad Printing

Electronics Forum | Mon Jun 28 17:03:59 EDT 1999 | M Cox

Hey there gang, how's it going ? Anyway's here's my probelm, got a new product to build double sided reflow, lot's of so20's and PLcc's 1206's, 0805's the usual stuff. Probelm is all the pad spacing of the 1206's are too big, my component's ar

Re: bare board problem

Electronics Forum | Thu Jun 17 19:40:11 EDT 1999 | Scott Cook

first of all what is the technical term for the small amount of solder on a plated pad. we are getting poor screen printing gasketing on a 20 mil qfp due to this solder not being even or too high in spots and not covering the length of the pads. an

Re: bare board problem

Electronics Forum | Thu Jun 17 19:40:27 EDT 1999 | Scott Cook

first of all what is the technical term for the small amount of solder on a plated pad. we are getting poor screen printing gasketing on a 20 mil qfp due to this solder not being even or too high in spots and not covering the length of the pads. an

Re: bare board problem

Electronics Forum | Thu Jun 17 19:41:29 EDT 1999 | Scott Cook

first of all what is the technical term for the small amount of solder on a plated pad. we are getting poor screen printing gasketing on a 20 mil qfp due to this solder not being even or too high in spots and not covering the length of the pads.

Re: quoting smt

Electronics Forum | Wed Jun 09 17:53:06 EDT 1999 | Tom B.

I am interested in seeing how some of you quote smt work. Currently we quote off a bom without component packages known then look in data books to find out what type of component they are. This job will be mine soon but i really believe there is a

Re: Wave Solder Problems - VIA HOLES

Electronics Forum | Fri Jun 04 11:31:27 EDT 1999 | Tony

I'm encountering a new problem at my new company that I haven't encountered before in my past life - and that's Wave Soldering VIA holes. We've been getting a rash of defects that we call in this company, "insufficient solder in VIA hole." The


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