Electronics Forum | Sun Jan 06 19:12:14 EST 2013 | jhengst
What parts are you having problems with. FYI. I have glass plate cal kit for sale if you know anyone interested?
Electronics Forum | Thu Jan 10 08:59:15 EST 2013 | rway
It appears the gold bleeding spans the gap between the plates, is this correct, or is it just the picture? If so, it should definitely be removed. Please clarify on what we are looking at.
Electronics Forum | Thu Jan 10 11:22:48 EST 2013 | pbarton
Looks to me like under etching of the underlying copper and the gold is just plated to all of the exposed copper surface. Is this characteristic the same on all solderable pads? You will not be able to remove this gold.
Electronics Forum | Tue Jan 15 10:35:08 EST 2013 | boriskilk
We would agree with Pete B about both the under etching as a possible issue and you will not be able to remove this gold. Another possibility is the solder mask (plating resist) hasn't been taken right to the edge of the pad.
Electronics Forum | Fri Jan 25 19:01:35 EST 2013 | hegemon
My first guess is that the plating in the barrel (via) has failed and allowed laminate/epoxy egress into the barrel and out to the surface of the board. Just a guess based on the picture.... 'hege
Electronics Forum | Wed Mar 20 07:16:03 EDT 2013 | vinitverma
I have customers populating LEDs on flex PCBs (with Aluminum support plates) with sizes up to 1,200mm (say 4ft) even on old Philips/Assembleon Topaz machines. What components are you planning to assemble on your flex PCBs?
Electronics Forum | Mon Mar 25 14:41:50 EDT 2013 | markhoch
Just a thought, but have you pulled the datasheet for the part and confirmed that the plating on the leads is compatible with your current process/profile?
Electronics Forum | Wed Jul 17 10:22:15 EDT 2013 | rgduval
Sure. Section 7.4 covers unsupported holes, and defines the usual standards. Clinching, fillet on the plated side, lead protrusion, etc. Cheers, ..rob
Electronics Forum | Thu Sep 05 23:32:29 EDT 2013 | winson16
This connector was designed with gold flash plating and the lead's surface was become dull and some black mark was observed on the contact surface.
Electronics Forum | Thu Oct 17 05:16:44 EDT 2013 | vincentdesilva2003
Anyone can help me how many percentage of blowholes and pinholes if i do the followings: 1. Increase copper plating thickness more than 25 microns. 2. Pre Baking of PCB to remove gassing by drying out the PCB's
