Electronics Forum: chamber and pcb (Page 1 of 55)

Aqueous wash chamber type

Electronics Forum | Tue May 14 04:18:40 EDT 2013 | leardkattiya

Hi, Anyone here experienced in aqueous wash of chamber type? Here's the issues. We have top and bottom portion inside the chamber but unfortunately evaluation had indicate only top portion of the rack is able to clean the PCB clearly.

pcb purchasing and pcb assembly

Electronics Forum | Thu Mar 19 12:26:10 EDT 2020 | yuaanliie

You have mostly set in your mind before purchasing PCB i.e. PCB is an acronym for the printed circuit board. Last month I purchased PCB from Great PCB.

pcb purchasing and pcb assembly

Electronics Forum | Wed Mar 11 04:05:02 EDT 2020 | floravictor

Due to the impact of the epidemic, will everyone's purchases be affected? We are pcb factory in Shenzhen, we are already back to work. skype: qjthomasxiao

seperation of soldermask and pcb

Electronics Forum | Tue Mar 18 11:53:58 EDT 2014 | sara_pcb

Our contract manufacturing agency have procured pcbs from approved vendor. After assembly we found solder mask separated from the PCB on the epoxy area as patches. The top side is intact. also over the pcb tracks, the mask got damaged. In what c

seperation of soldermask and pcb

Electronics Forum | Tue Mar 25 11:25:18 EDT 2014 | horchak

The first impression I get is that the mask was applied over dirty or contaminated copper. What is the trace and land finish on the PCB? You also appear to have a wetting problem.

seperation of soldermask and pcb

Electronics Forum | Tue Mar 25 09:35:28 EDT 2014 | emeto

Have you tried to bake the boards before you process them?

seperation of soldermask and pcb

Electronics Forum | Tue Mar 25 10:31:05 EDT 2014 | sara_pcb

The boards are baked for 2 hours at 120 deg C Regards, R.Saravanan

Desiccants and pcb finish degradation?

Electronics Forum | Tue May 15 15:15:53 EDT 2001 | ohboy

Hi all, I just discovered this forum and I'm very impressed. We have a vendor who recently stopped placing desiccants in the vacuum packaging for our pcbs. (Yes, it's on the dwg!) His reasoning was that the desiccants can degrade the finish on the

seperation of soldermask and pcb

Electronics Forum | Tue Mar 25 13:55:05 EDT 2014 | horchak

Ok lets put it this way. If the PCB house used a high quality mask and properly applied it to a properly cleaned surface and properly cured it, then as Dave stated above there are only two things that can destroy it. Excessive heat and overly aggress

seperation of soldermask and pcb

Electronics Forum | Tue Mar 25 08:29:33 EDT 2014 | sara_pcb

Please refer the attached jpegs, The problem is noticed after reflow soldering followed by conventional through hole soldering. Flux used one is MIL Std. Brush cleaning in IPA is followed after each soldering step. regards, R.Saravanan

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