Electronics Forum: hole wall pull away (Page 1 of 5)

Looking for expert opinions, Solderability

Electronics Forum | Fri Jul 23 06:48:23 EDT 2004 | mattkehoe

I am actually getting opinions that point to contaminated copper under the HASL finish. We've seen some "fish eyes" where the HASL is pulled away from the copper exposing a pin hole of copper that can be seen through the HASL finsh. We are planning o

Re: Qualifying new PWB Vendors

Electronics Forum | Fri Jan 15 17:13:07 EST 1999 | Earl Moon

Hello, We are qualifying new sources of PWB vendors. We've got the first lot of "produciton" boards in and we want to put them through the paces before turing the vendors on. So far, the tests I can think of

Etchback

Electronics Forum | Wed Oct 19 07:44:33 EDT 2005 | davef

When a hole is drilled during board fabrication, it can transfer resin from the base material (eg, FR4 core or prepreg) to cover the exposed edge of conductive material in the wall of a drilled hole. This is called resin smear. Etchback is a control

SiPlace Nozzle Change Issues

Electronics Forum | Tue Aug 28 14:17:55 EDT 2012 | markhoch

Okay, I'm tired of beating my head against the wall. The wall is becoming dingy, and it's leaving a flat spot on my bald head.... Has anyone had problems trying to train operators and/or Technicians on the proper way to recover from a Nozzle Change

Re: Universal GSM & paste-in-hole

Electronics Forum | Mon Feb 10 21:59:25 EST 2003 | MA/NY DDave

Hi I have to laugh since this is such an old note, yet somebody found the topic useful and a guy who works in Broome County responded during lunch. Must be slow.. Hee Hee. Go over to Gary's U Pull it. I haven't done these components yet, yet at Uni

Re: Green coating and through-hole plating

Electronics Forum | Thu Aug 13 12:55:46 EDT 1998 | Dave F

Hi, can you please tell me how to make green coating and through-hole plating of PCB? Thanks! Xingsheng Xingsheng: Welcome. Bible on PCB fabrication: Printed Circuits Handbook, Clyde Coombs, McGraw-Hill Web resources: http://www.pwbrc.org/ a

Re: Reflowing a thru-hole part

Electronics Forum | Wed Sep 08 22:48:27 EDT 1999 | armin

I have a board that has surface mount on both sides . On this board is a 22pin connector which is the only thru-hole part.This part is located on the component side. I would like to reflow this part. Can this be done? If so, how can this be done?

Wave Solder Pallets - Lead Free

Electronics Forum | Thu Aug 23 08:31:09 EDT 2007 | ck_the_flip

Dave, that's good thread, but I think Mike is more concerned with the Titanium inserts that pallet manufacturers often use to overcome sh*tty designs - like the ones where they put a Through-hole 2mm away from a SMT pad. He's not so concerned about t

Through-hole Connector Wave Solder Questions

Electronics Forum | Wed Feb 20 19:57:27 EST 2002 | davef

THIEVING * Layout: I�d guess the surface area of your thieves is not large enough. The pull from the thief is not great enough to over-come the pull from the connector pins and pads. Consider tripling the size of the thief. As you say, reducing t

Re: Reflowing a thru-hole part

Electronics Forum | Wed Sep 08 22:49:38 EDT 1999 | Jason Tomlinson

I have a board that has surface mount on both sides . On this board is a 22pin connector which is the only thru-hole part.This part is located on the component side. I would like to reflow this part. Can this be done? If so, how can this be done?

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