Electronics Forum | Fri Apr 09 09:08:40 EDT 2010 | cast2010
Hello, I produce two types of board. - 100% Thru Hole - 50% thru hole and 50% SMT For the second, I have a bad wetting after the reflow on the top. The pcb board have Au-Ni pad. I use a water soluble paste. I clean the board with a solution with
Electronics Forum | Thu Jul 08 15:38:27 EDT 1999 | Earl Moon
| Thank you all for your replies. Thanks to your replies and backup from the IPC-SM-782A (section 3.6.3.2) and James Blankenhorn's "SMT Design Rules & Standards," the designer has agreed to provide adequate clearance between the via and the pad. |
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
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
Electronics Forum | Fri Jan 21 00:46:28 EST 2011 | padawanlinuxero
www.flickr.com/photos/94427924@N00/5372753378 hope this is better
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.
Electronics Forum | Thu Jan 13 17:46:04 EST 2011 | davef
We've never seen the defect that you describe, but in wave soldering-land blowholes usually are caused by moisture in the board that out-gasses through the too thin plating of through holes. * Bandaid fix: bake the boards * Long-term fix: Obtain boar
Electronics Forum | Sun Jan 23 17:26:48 EST 2011 | piter
Hi In my experience try to change component to another batch or anther manufacturer it is very often problem in reflow when components have strange finish
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.
Electronics Forum | Thu Jan 20 08:22:14 EST 2011 | padawanlinuxero
http://www.flickr.com/photos/94427924@N00/5372753378/sizes/m/in/photostream/
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