Electronics Forum | Tue Jan 30 08:21:02 EST 2007 | GS
Please who can help me? I am looking for fiducial (cross shape) mark (target mark? Swiss mark?..)specifications used when COB wire bonding on PCB laminate. Pad pitch should be 250umm may be 220umm?). Mainly need to know which are the tolerances
Electronics Forum | Fri Jan 24 02:41:58 EST 2020 | borisanic
Thanks Phil. Is there any marks on calibration PCB or it is plain copper laminated PCB with dimensions 20"x20"?
Electronics Forum | Wed Dec 07 11:54:37 EST 2005 | russ
Would you by chance be soldering copper to aluminum?
Electronics Forum | Thu Oct 26 08:59:57 EDT 2000 | ptvianc
Performing a wetting balance test would be very difficult. The flux cored wire "configuration" is just not compatible with the methodology of the wetting balance test. If the wetting balance is a must, then you might ask the vendor for the flux for
Electronics Forum | Thu Mar 04 18:39:54 EST 2021 | SMTA-64387124
I have successfully used laser marked bar codes on PCBs. Use an area without any copper so that you are marking on the FR4 only
Electronics Forum | Tue Jan 16 16:15:03 EST 2024 | madisreivik
Have you considered laser marking ? Cheap chinese lasers can vaporize soldermask and leave "dark copper" marking.
Electronics Forum | Thu Dec 08 08:13:48 EST 2005 | grantp
Hi, Copper oxide is green right? So the green residue after a few days is corrosion of the wire? Regards, Grant
Electronics Forum | Wed Apr 17 03:37:29 EDT 2019 | mahammansoor
Hi, I work in a Cable and Wire manufacturing company. We are currently working on an order of Automotive wires that require strict RoHS compliance. What are the RoHS compliance strategies that we can implement at the production line (PVC and Copper
Electronics Forum | Mon Aug 27 08:03:32 EDT 2007 | davef
Actually, you will be soldering and wire bonding to the palladium layer, so we should have asked if you checked that layer, rather than the nickel. We not sure of the source of the copper that your see on EDX. It's possible copper from the pad migra
Electronics Forum | Thu Jun 08 11:37:44 EDT 2017 | jkitt84
davef, thanks for feedback. I talked with a plater who said they put copper before silver when plating brass. Would a complete stack of: Brass part, then 0.0001-0.0002" of copper, then 0.0005" of silver, then Tarniban anti oxidation. Sound reasonabl
