Electronics Forum: pass (Page 89 of 142)

Lead free profile

Electronics Forum | Sat Feb 26 22:32:42 EST 2005 | siverts

The directive is called RoHS. Meaning that is not only the lead that is the issue. The materials need to whithstand a hihger temperature, not only delta T is an issue (but huge). Moisture sensitive devices: how to handle these? You will see an increa

Lead free profile

Electronics Forum | Fri Sep 22 02:19:25 EDT 2006 | lead free tester

The directive is called RoHS. Meaning that is > not only the lead that is the issue. The > materials need to whithstand a hihger > temperature, not only delta T is an issue (but > huge). Moisture sensitive devices: how to handle > these? You wil

SMT Solder paste and wave flux evaluation

Electronics Forum | Fri Jan 28 12:29:01 EST 2005 | Bob R.

We use the exact same method Chunks outlined for evaluating just about anything we're going to roll out worldwide, whether it's a material or a machine. List your factors (print speed, solder spread, etc), assign each a weight, evaluate each paste a

Flux residual on joints of PIH

Electronics Forum | Wed Apr 27 10:52:52 EDT 2005 | saragorcos

Have you examined what type of residue is present? It is possible that what you are seeing is benign, though flux that is not fully activated often leaves harmful residue species such as chloride or weak organic acids. If you don't want to change p

Quad ZCR 941 and Lead Free?

Electronics Forum | Mon Jun 20 10:59:18 EDT 2005 | Jason Fullerton

Extra cooling is better (Alpha recommends -3 to -7 degC/sec) for cosmetics. Less chance of s o called 'cooling lines' that look similar to 'cold' tin-lead joints. (Seems a bit steep to me - I worry about the risk of cracking ceramic caps.) Might be

COB Issue's (non-sticking)

Electronics Forum | Fri May 20 02:04:26 EDT 2005 | kvanzill

Hello, I have been having random yeild problems with my COB process where we have non-sticking issues and no parameters have been changed on the machine from one assembly to the next. I recently inquired to the board manufacturer's about thier proce

SPM AV SCREEN PRINTER PROBLEMS

Electronics Forum | Sat May 28 21:23:38 EDT 2005 | Just my thoughts

This is somewhat a hard question: Have You ever concider to contact Your manufactor servive engineer?! I have been seeing a lot of "machine specific" questions here in this forum and I must wonder if this forum is to help people out when there is a n

Same wave process do not apply to all finish board

Electronics Forum | Thu Oct 13 15:41:30 EDT 2005 | lyrtech

Hi, We have a customer who give us a 20K board contract each year. It's only thru-hole components.The baord is HASL plated. So we pass it into our wave. No problems. Recently, our customer decided to go into GOLD PLATED finish. We take the same re

AOI selection,specifically ViTechnology and Mirtec

Electronics Forum | Wed Jul 19 20:28:49 EDT 2006 | mrduckmann2000

We recently purchased a Mirtec AOI machine, it take a bit to program but overall we are pleased. The machine has a downward looking camera, we have had some issues with the machine not catching opens. When a IC has it's legs bent straight up off th

Lead free component VS vision on Mydata M12

Electronics Forum | Tue Nov 22 10:46:46 EST 2005 | A Total Green Planet Solution

Try using a contrast filter. This seems to help. Also on the camera it self there is a white level control. Adjusting this may help. The bad thing is it may affect all your other profiles. Some times an easy fix is to have a screen print mark close t


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