Electronics Forum | Fri Jun 09 12:35:00 EDT 2006 | G. eisner
We are finding this diode not reflowing well. We are having tombstoning issues with this part and only this part on different pcbs. The main thing we find is that under a scope there is blow outs as in air bubbles that look like they have exploded. I
Electronics Forum | Tue Dec 21 18:08:40 EST 2010 | cbroegger
Hi Gary. I have the same problem on my Siplace feeders, and have tried different products like you have. This is what I have experienced so far: The "bag sealer" method does not really work well. Problem is that the tape foil type (plastic type) var
Electronics Forum | Tue Jul 15 16:12:23 EDT 2008 | boardhouse
Hi Armynski, I sell for an offshore board house, yes, it is common for offshore board shops to fill vias. The bubble is caused by air entrampment within the hole it self, when heat is applied during Hot air and the via is covered on both sides the e
Electronics Forum | Mon Sep 21 20:45:55 EDT 2009 | davef
10.4. Pre-Cure Examination. Immediately after material application, the uncured conformal coating shall be examined for: a. Bubbles and Air Entrapments. These defects shall be broken by vacuum, with a sharp probe, or other appropriate tools. b. Bridg
Electronics Forum | Wed Jan 23 23:45:35 EST 2019 | kiransahu
Piezoelectric type (office/industrial) In this method, a piezoelectric (piezo) element, whose volume is deformed when voltage is applied, is used to discharge ink particles. This element is attached to the component that is filled with ink. Then, th
Electronics Forum | Fri Nov 26 06:18:18 EST 1999 | stefano bolleri
Jeff & Ted, we have used a dispensing system too and yes, I agree, we are not too happy with the results. Not at the point that it doesn't work, though. I think our problem basicly is that we have selected an entry-level dipensing system. We are app
Electronics Forum | Tue Dec 28 21:51:04 EST 2004 | KEN
When using a foam fluxer: 1. Bubble size is important. What stones are you using? Ever clean them? Too large a bubble will NOT help your situation. (I forget bubble size range....check with your fluxer mfgr.) 2. Thinner will help in capilary m
Electronics Forum | Thu Jan 31 15:13:20 EST 2008 | chef
You will need to develop your reflow profile which includes drilling a hole through the fab and into the ball for accurate temp measure. During profile/process development you will probably want 3D x-ray (consider contracting that out). Once in prod
Electronics Forum | Tue Nov 14 18:38:59 EST 2006 | Brandon
Hello all, I am having an issue with some boards on our Wave Solder. It is a Pb free wave and These particular boards are exibiting A LOT of what I call solder bubbles in the larger than usual vias and un-used thru holes. Settings: 4 inch/min 144c to
Electronics Forum | Thu Apr 08 10:54:16 EDT 2004 | mrmaint
We typically store the tubes straight up and down. This seemed to help with the air pocket problem. Did not solve it 100 percent. best bet is still vacum.
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