Electronics Forum: plating (Page 126 of 252)

ENIG (thru hole ring turns black after wave soldering)

Electronics Forum | Tue Jul 05 18:13:03 EDT 2016 | padawanlinuxero

As my fellow members are saying this is a bad mfg process, you need to talk to your supplier to see if theres something contaminating the ENIG plating, this is a very critical issue you must act on it before some problems arise in the field where can

Problems with Vision and White Soldermask

Electronics Forum | Tue Aug 02 10:46:03 EDT 2016 | proceng1

We are getting more and more customers wanting LED boards built on White Solder Mask. Well our printers do not get as much contrast between the white mask and the plated fiducial pad, and often the camera only sees white. Other than playing with

Au Wire bonding failure

Electronics Forum | Wed Dec 14 12:34:56 EST 2016 | cy4223111

Hi all, Recently, we are trying to do wire bonding between a 75 * 75 um pad on a chip and substrate with 150 um height difference, but when completing wire bonding and the wire bonds on pad and substrate, the pad will get out of the chip easily

Waves soldering: not enough solder remaining on pads

Electronics Forum | Tue May 23 03:40:20 EDT 2017 | bukas

the problem I had with pump was that turbine intake was eached by alloy. when I repaired intake, it was a irregular hole about 32mm in diameter, mechanics welded piece of plate with a 24mm hole (that was a factory size) we had to reduce pump speed fr

Waves soldering: not enough solder remaining on pads

Electronics Forum | Wed Jun 07 09:39:49 EDT 2017 | stevezeva

Hi again Zac, Nickel appears a little darker and won't have as much of a deposit as it is plated on. But if you want a quick test you can buy a little kit from Amazon that tests for nickel. Some people are allergic to Nickel https://www.amazon.com/

Soldering electrolytic capacitor

Electronics Forum | Tue Jun 27 12:21:32 EDT 2017 | deanm

Sounds like a selective soldering machine would be your ultimate answer. But if you must hand solder, an oven, preheater or anything to heat the core of your board would help as mentioned before. We've used hot plates with success. As far as irons g

How are you reworking high mass LED pcb's?

Electronics Forum | Thu Jul 13 02:30:29 EDT 2017 | jandon

We are using hot-plate. It is the safest method to rework aluminum substrate PCB's. http://www.martin-smt.de/en/rework/products/pre-heater-hotbeam.html "For efficient rework on heavy electrical systems with flat bottom surface and LED PCBs the pow

Immersion Silver Issues

Electronics Forum | Mon Aug 07 13:27:40 EDT 2017 | dleeper

Are you seeing this on bare PCBs or after assembly? with Immersion silver, the finish over the copper should be very thin and uniform, that's the main advantage of ImAg. You should not be seeing excess plating filling vias unless: A)Its HASL, not

Looking for a source for extruded pins

Electronics Forum | Fri Feb 09 03:03:29 EST 2018 | robl

Hi SuMoTe, Maybe a lot cheaper to go to a connector manufacturer and buy your pins from them - most standard 2.54mm pin headers use 0.64mm square pins (0.025" = 0.635mm), that are 12.6mm (0.5") long. Perfect. They will be plated with a solderable

QFN84 Solder Printing Issue (QFN with Inner LGA Pad)

Electronics Forum | Fri Dec 01 13:55:44 EST 2017 | emeto

Brikainis, it looks like these vias are not plated and closed. I would say that thickness of your paste is lifting the part. Are you willing to try another stencil with ground pad apertures matching the via holes? It is probably worth trying. Anothe

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