Electronics Forum: pcb bubble (Page 1 of 6)

Thicker MBB Bag Punchure

Electronics Forum | Tue Mar 05 07:42:03 EST 2019 | charliedci

We've noticed that bare PCB from fab house use bubble wrap vacuum sealed, however most of the time at the corners of stack of PCB bubble wrap is broken. Can't get our PCB house to change. For moisture sensitive components in house after partial use

Solder Mask Bubbling On PCB from Supported Via Holes

Electronics Forum | Tue Jul 15 17:54:57 EDT 2008 | arminski

thanks sir! you explained it very well.... thanks a lot!

Solder Mask Bubbling On PCB from Supported Via Holes

Electronics Forum | Wed Jul 16 19:07:59 EDT 2008 | boardhouse

Your Welcome.

Solder Mask Bubbling On PCB from Supported Via Holes

Electronics Forum | Mon Jul 14 12:55:07 EDT 2008 | arminski

I have a board with the above problem from our PCB supplier. After they applied the solder mask and run the PCB's to HASL process, the solder mask bubbled on one side of the PCB making the solder mask thickness higher and PCB looking awkward. They s

Bubbles on solder joint(after conformal coating curing)

Electronics Forum | Sun Nov 22 19:53:10 EST 2009 | prodrivegsr

Hi Ju Yong, The PCB are dry in an airseal cabinet(Staging Chamber) before IR Oven. The bubbles show at around body and solder joint area. You mean the moisture will create bubbles ? Able to advice the humidity and temperature that you are using in

Bubbles on solder joint(after conformal coating curing)

Electronics Forum | Sun Nov 22 18:40:47 EST 2009 | 89jeong

Hi The bubble shows only around component body after ir reflow. I think bubble means that there is a moisture. How do you dry the PCB(?) before IR reflow? Thanks Ju-young.

PCB over shelf life

Electronics Forum | Thu Dec 16 04:14:16 EST 2010 | kemasta

Hi, I am new in this industrial. I learnt that PCB may absorb moisture and eventually caused delaminate after heat apply on it (reflow or wave). But I don't quite understand, if the PCB was keep in sealed bubble bag, and with the humidity control wit

Unsoldered gold pads on unleaded wave solder process

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

Wave Solder Non wetting holes

Electronics Forum | Thu May 19 13:03:18 EDT 2005 | russ

On the non-wetted holes put a solder iron to them and see if they "bubble" if so, you have some outgassing in your PCB and they will need to be baked prior to assembly. If this is okay I would investigate the grnd layer that was mentioned. What is

Bubbles after coating

Electronics Forum | Fri Sep 21 17:33:01 EDT 2018 | michaelszuch

Hello Hai, The first step is to determine where in the process the bubbles are being generated - either during coating or during curing. You can easily check this by letting a few boards air dry (no oven) and comparing them to the oven-cured ones. I

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