Electronics Forum: hasl (Page 81 of 94)

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: bare board problem

Electronics Forum | Fri Jun 18 10:24:12 EDT 1999 | John Thorup

| 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: Delamination

Electronics Forum | Tue Apr 27 13:58:15 EDT 1999 | Scott McKee

| Board Experts | | I am fighting with a board house about a delamination problem.. First the facts | 1) 10 layer board .063 thick HASL Finish Aprox 16 in x 17 in. | 2) 150 Boards with this part number built with the same reflow oven settings (2

Re: Delamination

Electronics Forum | Tue Apr 27 17:22:40 EDT 1999 | Dave F

| Board Experts | | I am fighting with a board house about a delamination problem.. First the facts | 1) 10 layer board .063 thick HASL Finish Aprox 16 in x 17 in. | 2) 150 Boards with this part number built with the same reflow oven settings (2

Specifying Pcb Format/Construction. Help!!

Electronics Forum | Mon Apr 26 09:06:41 EDT 1999 | Murray Pulman

Help Guys!! We sub con assemble small to medium batch runs of mixed tech boards inc fine pitch BGA o4o2 etc. As usual we get all the crap to build that no-one else wants, however lately some customers are getting a little more serious with their sa

Re: 2% silver solder paste

Electronics Forum | Tue Apr 13 09:11:54 EDT 1999 | Dave F

| We process both tin/lead plated boards and gold plated boards in our surface mount group. I have used Sn62/Pb36/Ag2 solder paste on all gold plated boards to help prevent gold scavaging. To reduce the amount of different solder pastes we have to

Re: 2% silver solder paste

Electronics Forum | Mon Apr 19 02:45:31 EDT 1999 | Brian Sloth Bentzen

| | We process both tin/lead plated boards and gold plated boards in our surface mount group. I have used Sn62/Pb36/Ag2 solder paste on all gold plated boards to help prevent gold scavaging. To reduce the amount of different solder pastes we have t

Re: CPk using glass slugs?

Electronics Forum | Thu Feb 25 22:01:52 EST 1999 | Chris G.

| Read an earlier thread about using glass slugs to determine placement CPk. Can it actually be done this way? What's the procedure? Be interesting to know 'cause if it's feasible, I'd probably get myself a kit. None of us here are stat's experts

Re: Fiducials

Electronics Forum | Fri Feb 19 11:28:51 EST 1999 | Steve Gregory

Hi Bob, I know what you're talking about, it seems that most machines that I've worked with, have at one time or another some problem seeing a fiducial. Some machines are worse than others, and it really didn't make a difference what kind of vi


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