Electronics Forum: hasl vertical (Page 1 of 1)

Re: 20 mil qfp bridging

Electronics Forum | Tue Aug 17 10:41:13 EDT 1999 | Steve A

Wayne, Sounds like a gasketing problem. When the horizontal apertures are bleeding but not the vertical apertures. Could be poor underside support, HASL miniscus issues, masking or plugging issues, but what many people do not account for is that t

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: bare board problem

Electronics Forum | Thu Jun 17 20:48:18 EDT 1999 | Earl Moon

| | 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: Poor HASL Finish known to cause solder shorts?

Electronics Forum | Fri Sep 24 10:57:18 EDT 1999 | Earl Moon

| Hi Folks: | | We've been having bridging problems on our fine-pitch QFP's, despite thorough inspection of paste height, volume, and placement accuracies....profiles look good also. | | The bridging is happening after coming out of reflow...one la

Re: bare board problem

Electronics Forum | Fri Jun 18 10:46:10 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 11:37:10 EDT 1999 | Earl Moon

| | | | 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 pa

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