Electronics Forum: voiding with gold (Page 7 of 22)

Pb-free wave soldering with SMD

Electronics Forum | Sat Nov 26 05:55:04 EST 2005 | milroyperera

Hi, Does any body have the experience with wave soldering a "Gold" plated PCB with SMD assembled on it? I`m experiencing massive bridging,icicles,Shadowing & Skipping. The present soldering angle is 6 deg:,pre heating rate is 2 deg/sec , Dwell time

Pb-free wave soldering with SMD

Electronics Forum | Mon Nov 28 09:46:24 EST 2005 | pjc

I have waved gold (ENIG) boards. That's a pretty hot pot at 260C, wow. I have used 245C with good results. All other parameters look OK a glance. Well, PCB temp looks a little hot too at 130C before pot. 90-100C is typical for most No-Clean flux. At

Gold Flash with QFN28 problem

Electronics Forum | Thu Mar 30 09:32:54 EST 2006 | russ

Not arguing dan, but are you positive that they are not copper? anyway, what is happening is as the parts sucks down onto the board from reflow the extra paste is notnecessarily sqeezed out but it has no place to go. So it will form this ball on th

Gold Flash with QFN28 problem

Electronics Forum | Thu Mar 30 10:21:44 EST 2006 | Dan

Sorry about that(My bad), they are copper. I believe the same thing, we need to reduce the appatures as we are already at 5mil. Our main problem is the customer...Their tests were failing and for some reason they touched that part up, and then the un

Faults Associated with Pumice Scrub

Electronics Forum | Thu Apr 15 11:14:34 EDT 2004 | mikecollier

Our conformal coat area has recently requested changes to our bare board houses to perform a pumice scrub operation on the PWB prior to HASL plating and delivery to us. Our first lot received caused us to have void faults under multiple component ty

Problems with TI DSP modules

Electronics Forum | Wed Oct 24 18:08:02 EDT 2001 | davef

1- DF1: WOW!!! How do people get these cool toys? CB: I am with the University at Buffalo Electronic Packaging Lab. http://www.packaging.buffalo.edu We have pretty much everything that is sold on the market as well as Laser inspection technologies we

Achieving High Yields with CSP

Electronics Forum | Thu Aug 26 10:28:07 EDT 1999 | Stuart Adams

What are the key steps to achieving high yield with CSP ??? (We are trying qualify vendors for volume fab/assembly of some products which use several CSP devices on each side of the board. (Some with 0.5mm ball pitch)) Looking through the forum I

Problems with TI DSP modules

Electronics Forum | Thu Oct 25 16:48:29 EDT 2001 | Cemal Basaran

We can inspect and measure strain field in anything larger than 320nm with Laser techniques we have. We can do this measurements during fatigue testing. Of course thick intermetallic region as a solid region is a problem due to the fact that you ha

The glue with the holes...

Electronics Forum | Thu Oct 18 18:37:49 EDT 2001 | davef

You�re correct. Probably every supplier�s product has slightly different cure characteristics. Let me spin this up a little differently � There was a slight imbroglio in my office this morning involving a couple of stalwarts and the last Krispy Kr

Mixing no-clean solder with activated

Electronics Forum | Thu Jun 28 10:46:44 EDT 2001 | genny

Thank you. I'm sorry if I came across frustrated or anything, but I wasn't sure if people were ignoring the one question I kept asking or if, as you said, they just didn't know. Here's the deal. We are a small company rapidly growing into a larger


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