Electronics Forum | Mon Aug 10 12:58:04 EDT 2020 | SMTA-64386637
We have found Acrylic CC under QFNs is a failure mechanism in thermal cycling. The coating acts as a wedge and causes solder joint cracks. We do not coat QFNs. To enhance reliability we have the vias plugged with solder mask. This eliminates some
Electronics Forum | Fri Jun 02 23:53:16 EDT 2023 | calebcsmt
In both IPC standards, it is referenced: "When 'X' standard is cited or required by contract, the requirements of 'X OTHER' do not apply unless separately or specifically required." I've always understood J-STD to be the act of assembling, where A-6
Electronics Forum | Wed Apr 11 17:03:28 EDT 2001 | mparker
I've used Super Glue, with Kapton tape. The glue leaves a small residue and the tape acts as a strain relief. If you can sacrifice the board, drill a small hole through the board, push the exposed ends of the thermocouple up from the back side, lay
Electronics Forum | Tue Jul 10 13:45:23 EDT 2001 | markhoch
We're stencil printing a Loctite 3614 Chipbonder adhesive, and we're using BioAct SC-10 presaturated wipes to clean the stencil after printing, without much luck. Operators are not able to remove all adhesive material left in the aperatures, and aft
Electronics Forum | Thu Dec 19 13:55:35 EST 2002 | John
I don't know what type of boards you are doing but if they are through hole or surface mount. You can get a whole line of used equiptment for pennys these days. I am sure that I could send you a quote for a complete line. The price of used equiptment
Electronics Forum | Mon Feb 08 08:33:27 EST 1999 | Clifford Peaslee @ SMTnet
Hello all, Now that we have the new site up, we know there will be some bugs here and there, so please email me, so that I can act quickly. Some known problems at this time: 1. web email: cannot read attachments, java folder view doesnt work on all
Electronics Forum | Tue Sep 15 07:46:01 EDT 1998 | Wayne Bracy
| Another inexpensive, but good nozzle resource is WP Sales | (817) 459-0181 | I believe they can also do Custom nozzle jobs. | -Ben | Wayne....Should Hover Davis be mentioned here too? Ben: Would you get your ACT together. Just joking. Sure we sh
Electronics Forum | Wed May 27 10:19:43 EDT 1998 | Jerry
We have no problems but orientation does matter. Orient with longest side of component body perpendicuar to wave. In other words the same preference as with through hole DIPS. Idea is the same as for through hole, that the surface tension will ten
Electronics Forum | Tue Jan 08 14:58:33 EST 2002 | edmentzer
It sounds like an interesting idea. I have ask MYDATA about a user group, but they always act like it would not a good idea. I think every user has something to share or a question that could answered by someone who has "been there done that". We
Electronics Forum | Mon Jun 24 21:56:15 EDT 2002 | davef
Russ is correct. The sales-types telling you these stories are not acting reputably. You should not allow them in your plant. If you do not control the sales-types that gain entry to your plant, ask that person to come on-line here and we will exp
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