Electronics Forum | Thu Jun 16 17:02:40 EDT 2011 | boardhouse
The finish looks like Immersion Tin or Silver. if its lead free Hot air - could be issue of to high of a Tin Content. find out what brand of Hasl they are using. SL100 Example. Is this tarnished look only being seen after assembly or have you seen
Electronics Forum | Wed Jun 08 13:49:48 EDT 2011 | sonofptolemy
Hello, I am having a problem with HASL PCB's after it comes back from the stuffer. To me it looks like oxidation and it causes poor wetting. This leads to a bunch of problems all of which have different symptoms but the cause is this oxidation proble
Electronics Forum | Wed Mar 05 13:12:33 EST 2003 | msivigny
Hello davide, the biggest advantage you'll find with a complete N2 tunnel is the minimization of oxidation during board preheating. Using only an inerted solder pot allows the oxidation to build up throughout the preheat stages and introduces contami
Electronics Forum | Wed Dec 01 06:05:33 EST 1999 | Wolfgang Busko
Hi Dave, yes messy, that�s the result of trying to use the newest chips available, getting the first shot (prototype chips) and building a couple of hundred boards and than detecting that the protos do not what they are supposed to do.As our market g
Electronics Forum | Wed Nov 17 10:03:29 EST 2010 | scottp
Instead of a minimum thickness, we require no exposed copper or SnCu intermetallic. We've been having a lot of trouble lately with suppliers of SN100 HASL boards giving us pads with very irregular solder deposits with areas of exposed intermetallic.
Electronics Forum | Thu Apr 28 17:02:07 EDT 2011 | grasso1976
Has anyone had success utilizing the lifted lead/ height checker feature on a Mirtec MV-7L. We recently had two separate events where the machine did not detect a lifted lead using the ic/bridge inspector. The soldering results came back with out def
Electronics Forum | Sat Oct 02 10:49:36 EDT 2010 | tod1967
Yes it is possible to detect lifted leads with top view camera's. The camera's must be coupled with software that utilizes algorithm programs. MVP - Machine Vision Products out of Carlsbad, California uses algorithms in their software. Most AOI co
Electronics Forum | Tue Oct 05 12:08:50 EDT 2010 | tod1967
I checked with MVP after Reese's comment, they use special color lighting in addition and have many customers detecting lifted leads successfully. It doesn't really matter unless your looking for a better AOI system/supplier. Hopefully your equip
Electronics Forum | Wed Sep 29 05:30:59 EDT 2010 | patejl
Hi We have a problem here in the company with AOI system, most of the problem is lifted lead on qfp components.We are using SAKI BF-planet-x. Most of the defects like mising components 603 or 402 are no problem but if it comes to lifted lead even
Electronics Forum | Sat Oct 02 15:26:59 EDT 2010 | rway
Possible, but difficult. What algorithm programs are you referring to? Mirtec and YesTech both utilize algorithms in their respective software. The algorithm is simply a series of instructions to perform the inspection. In this case, rules-based,
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