Electronics Forum | Tue Nov 16 06:52:44 EST 2010 | cacace
1 um". Some PCB manufacturer is telling me that this specification is not feasible in production. I would know if this position is due to the equipment (or process control) they have, or if in effect is not possible to satisfy my requests.
Electronics Forum | Wed Nov 17 07:39:20 EST 2010 | jax
Most PCB manufacturers should be able to fall between 1.25um-5.00um for Pb-Free HASL. I doubt you will get anyone to agree to anything higher. If you are going to require an average thickness, make sure you also state "No Copper exposure allowed".
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 | Tue Dec 21 12:28:27 EST 2010 | wrongway
I know when we used them we had problems when one pad is 7 mils tall nest to a flat pad one lead touches the pad the lead next to it isnt touching anything so then have an open I don't see how anybody dosnt have problems with it that use quad flatpa
Electronics Forum | Wed Dec 22 01:39:06 EST 2010 | boardhouse
Hi Johan, As a Asian board supplier - I would not recommend using Lead free hasl on any product that has BGA, you would be just looking for issues, flatness being the main. I agree with one of the other replies - Your purchasing dept. should not be
Electronics Forum | Sat Jul 28 08:37:52 EDT 2007 | davef
There is no good choice. Board Finishes: Industrial/Battelle Class 3 Environment [Reliability Knowledge Gaps: For use of Pb-free solders in High Reliability Applications, J Smetana, iNEMI Availability of SnPb-Compatible BGAs Workshop, March 1, 2007,
Electronics Forum | Fri Jul 27 10:07:18 EDT 2007 | rgduval
Our preference has been ENIG. We find that we achieve higher quality (visually) soldering for through hole and surface mount parts, with less handling issues than when we use white-tin, or immersion tin. We are about to do a test on some boards tha
Electronics Forum | Fri Jan 14 08:42:47 EST 2005 | Jim Zanolli
We are performing testing for lead free connector finishes. We want to run solderability tests on a series of lead free connector plating options in a series lead free PCB's. I need some advice on the most popular lead free PCB finishes. I am aware
Electronics Forum | Mon May 18 20:57:06 EDT 1998 | Earl Moon
.025" pitch so the only problem we run into is too much HASL on the adhesive side causing improper glue dispense. | As Earl keeps saying HASL thickness is hard to impossible to control. I think we need to look hard at OSP's again but then you get in
Electronics Forum | Mon May 18 22:54:04 EDT 1998 | Dave F
.025" pitch so the only problem we run into is too much HASL on the adhesive side causing improper glue dispense. | | As Earl keeps saying HASL thickness is hard to impossible to control. I think we need to look hard at OSP's again but then you get
