Electronics Forum: bungard pcb drilling (Page 9 of 19)

Unusual solderability issue

Electronics Forum | Mon Apr 19 11:04:21 EDT 2010 | baildl632

We have had some unusual reflow conditions with BGA's as well. We did not come to the conclusion that something was covering the lands though. It typically occured with only the BGA lands (not the decoupling caps on the back side). We found that the

PCB's for oven profile testing

Electronics Forum | Mon Aug 26 20:33:50 EDT 2002 | davef

Not as such. Generally, people tailor their profiles to produce glam solder connections on their boards. Search the fine SMTnet Archives for discussion on the factors affecting solder reflow recipes. What is the best way to get these PCB made to s

Cleaning PCB's after routing

Electronics Forum | Fri May 22 22:18:18 EDT 1998 | David Newman

Hello, I am looking for suggestions for cleaning pcb's after the routing (fabrication) process. Keep in mind that these pcb do not have components intalled on them yet. We have considered pre-drilling the routing plunge points, but cost and capacity

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: Depanelization Troubles

Electronics Forum | Wed Jun 10 09:27:36 EDT 1998 | Steve Gregory

| We're running into problems with board damage (broken traces, solder shorts) due to pliers and other bizarre tools being used for depanelization. I need some sort of fixture for this. A delrin plate with a slot cut to the correct depth and width mi

Temperature Probes for Reflow Profiling

Electronics Forum | Mon Jul 16 10:21:29 EDT 2007 | samir

d0mino, Given the fact that the SLIMKic has built in wave detection, you can just make a pallet out of 10mm delmat material, and drill a couple of holes on the pallet for the wave detect T/C's (ports 2 & 3 for left and right). All the wavesurfer is

Re: Screen Printing Glue

Electronics Forum | Tue Mar 30 02:32:42 EST 1999 | Scott Davies

We have carried out some experimental work, in conjunction with DEK. Instead of dispensing adhesive for SMD components onto the bottom side of on of our PCBs, we have looked at the possibility of screen printing the adhesive. Because, at the stage of

SMT Connector, Placement Issues

Electronics Forum | Fri Oct 03 10:24:17 EDT 2008 | chineechooze

I have a problem with placement repeatability and accuracy on this Samtec connector. The customer wants to use a "nubbed connector" which has to be placed in the corresponding PCB holes. When the nubs miss the holes, the part becomes "lifted." SEE

PCB profiling

Electronics Forum | Mon Feb 16 10:33:58 EST 2015 | rgduval

Drilling a hole, and attaching the thermocouples underneath the part is the recommended way to profile for a BGA, unfortunately. It allows the best method of collecting specific data, including any thermal sinking/shadowing that the BGA creates. Ho

QFN84 Solder Printing Issue (QFN with Inner LGA Pad)

Electronics Forum | Fri Dec 01 15:06:54 EST 2017 | emeto

I am not sure that is doable. Ground Aperture is very small(for the stencil blade to get in there) and very close to the other apertures. I want to say the minimum requirement for step is 6mm clearance from other apertures for the stencil houses that


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