Electronics Forum | Tue Aug 21 22:24:36 EDT 2001 | davef
Root around here http://www.kns.com/resources/library/lib-wirebonding.asp
Electronics Forum | Fri Aug 17 11:55:31 EDT 2001 | davef
5uin. Your nickel thickness is fine. Although if you wanted to trade costs, consider giving-up nickel to 150uin thickness, while increasing the gold thickness. Gold over electroless nickel creates brittle joints because of phosphorous in the nicke
Electronics Forum | Thu Jun 14 04:24:32 EDT 2012 | brettrenishaw
Yes pads are still gold after the wave soldering process even if you wave solder a pcb several times. I have tried soldering using an iron and the solder takes to the pad as you would expect. This happens on all boards of this type and all boards are
Electronics Forum | Fri Aug 17 01:40:55 EDT 2001 | V.RAMANAND KINI
We are in the watch & clock Business. We have a Watch IC chip that has to be wirebonded using Ultrasonic aluminium wedge bonder. The wire dia is 1.25mil. The PCB is made of G10 Glass epoxy copper clad laminate. The copper thickness is 18 microns. The
Electronics Forum | Tue Mar 21 20:25:30 EST 2000 | Dave F
John: What�s the matter? Free gold � good thing for you, bad thing for your supplier. :^) Pre-tinning of gold plated leads is important to: � Prevent gold embrittlement of the solder joint � Determine if the leads are solderable prior to assembly (
Electronics Forum | Mon Aug 27 15:06:29 EDT 2001 | davef
This otta push Wolfgang over the top ... Recommended reading G.G. Harman, Wire Bonding in Microelectronics : Materials, Processes, Reliability, and Yield, 2nd edition, McGraw-Hill Electronic Packaging and Interconnection Series, 1997. G.G. Harman, R
Electronics Forum | Tue Sep 05 05:25:27 EDT 2017 | heros_electronics
Hi, I think your friend wrongly changed the D code so that the finger width doesn't meet your requirements. And the fingers have long and short ones, which is hard to do selective gold plating because of not easy to add plating wires. Of course, you
Electronics Forum | Tue Feb 21 01:32:49 EST 2017 | soldertraining
Looking for advice on soldering lead free paste to a board with very heavy gold plating, In my opinion, Gold contact surfaces are often used on circuit boards with membrane switches which is a choice of technology for industrial, commercial and consu
Electronics Forum | Mon Jul 03 23:11:04 EDT 2000 | Patrick Ng
hi, We are receiving PCBs with gold fingers "discolored". The "discolored" gold fingers can be removed if rub with soft eraser! We are working with suppliers to determine the root cause and eliminate this issue. Pls assist if you have encountered si
Electronics Forum | Sat Nov 14 08:05:54 EST 1998 | Earl Moon
| | | | I believe that gold fingers on my circuit boards are being | | | | contaminated and need to clean them with some chemical | | | | solution. Any recommendations. | | | | | | | Chuck: What is the type and source of your contamination? Dave
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