Electronics Forum: blow hole (Page 1 of 16)

Pin hole

Electronics Forum | Wed Mar 10 18:42:34 EST 2010 | 89jeong

Hello Sir. We also encountered the same pin-hole issue but there was around MLCC.I also looked for some information in technical report and internet, But i failed to get an answer. As you know this pin hole or blow hole is caused by the solder boilin

Pin hole

Electronics Forum | Thu Mar 11 02:56:01 EST 2010 | grahamcooper22

Hi, blow holes / pin holes / holes in joints are usually a sign that there is excess moisture somewhere around the solder joint. Moisture can be in pcbs / components, so try drying them....a simple thing to do is pass a bare pcb throught your reflow

Re: ESD Compliant - Air blow off to dry washed circuit board assemblies

Electronics Forum | Wed Apr 12 21:04:10 EDT 2000 | Dave F

Ashok: You still didn�t tell me why you want additional drying of your boards, but what the hey, we all have our dark secrets. Anywho, let�s consider some options for reducing the moisture of your cleaned boards: OPTION 1 - Up-Grading Your Cleaner

Blow hole on pad after reflow oven

Electronics Forum | Fri Jan 21 13:27:38 EST 2011 | mosborne1

Try baking your boards first to remove the moisture. Moisture and boards that have not been drilled properly will cause pin hole or blow holes in PTH. Also take a look the surface of the pads before printing. You maybe contaminating the surfaces of t

Blow hole on pad after reflow oven

Electronics Forum | Wed Jan 12 10:41:20 EST 2011 | padawanlinuxero

Hello guys ! I have a problem, I am finding some blow holes in the solder join in a resistors pad, can this be because of high humidity in the board? does baking the boards fix the problem? thanks

Blow hole on pad after reflow oven

Electronics Forum | Thu Jan 20 11:02:46 EST 2011 | dyoungquist

Armando Link does not work. Goes to a "page not found" error in flickr.

Blow hole on pad after reflow oven

Electronics Forum | Fri Jan 21 00:46:28 EST 2011 | padawanlinuxero

www.flickr.com/photos/94427924@N00/5372753378 hope this is better

Blow hole on pad after reflow oven

Electronics Forum | Wed Jan 12 20:18:14 EST 2011 | Jacki

How many % were affected? If a few,it can be caused bcoz of PCB coating. We had encountered it and PCB house replaced for faulty boards. Since then, we do test first if we hve to solder PCBs from this PCB house.

Blow hole on pad after reflow oven

Electronics Forum | Thu Jan 20 08:22:14 EST 2011 | padawanlinuxero

http://www.flickr.com/photos/94427924@N00/5372753378/sizes/m/in/photostream/

Blow hole on pad after reflow oven

Electronics Forum | Fri Jan 21 11:00:56 EST 2011 | xps

Hi, in my experience, the humidity is trapped in the solder paste. Otherwise you can also try to : adjust preheat profile, and /or increase paste viscosity, and /or increase paste metal content (they are the most common causes).

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