Electronics Forum | Thu Mar 27 08:05:20 EDT 2008 | davef
Search the SMTnet Archives for threads like: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=6753 where J Medernach says, "Make sure your supplier uses some sort of process control of coating thickness. If they don't have a photospectromete
Electronics Forum | Thu Jul 19 09:56:52 EDT 2001 | Damian Holzmann
The obvious difference between 2D and 3D is that an accurate volumetric measurement can only be obtained with a 3D measuring system. Laser line measurement in 2D does not allow accurate volumetric measurement. If you modify the aperture in a stencil
Electronics Forum | Wed Sep 08 20:22:38 EDT 2021 | emeto
Hello, do you perform any stencil maintenance? What type of controls do you use? Also interested if you have a way to measure nano coating thickness? Any ideas will be appreciated.
Electronics Forum | Wed Jul 06 20:33:39 EDT 2005 | davef
Pat In response to your questions: Q1. How did you measure the area reduction (loss of weight or reduction of diameter/thickness)? A1. We measured the starting and ending diameter. Then calculated the area [assuming symmetry]. Q2. How did you tak
Electronics Forum | Mon Mar 28 08:56:26 EDT 2011 | cvoyles
Where you inspect depends on what you're looking for. X-Ray is a fairly specialized piece of gear and doesn't lend itself for example to paste registration or thickness measurement. A laser system is better suited. An X-Ray system would allow you to
Electronics Forum | Wed Jul 23 05:26:23 EDT 2008 | aj
Hi all, Thanks for all the replies. I got some XRF carried out on the boards ( ENIG) and they measure 0.03-0.04 microns of gold thickness. Boards that we have had no problems with measure 0.07-0.1microns. This looks like the main contributor alon
Electronics Forum | Tue May 14 11:52:04 EDT 2002 | Claude_Couture
Excuse me, but if I remember my physics lessons well, volume is what the water displacement measures, not mass. therefore, if you take the volume of water displaced by your populated PCB, divide it by the thickness of the PCB (which is easy to measur
Electronics Forum | Wed Jun 12 08:33:39 EDT 2013 | emeto
Just measure width, length and thickness and buy from anyone that sells belts. This is just the website that comes on the top when I typed "conveyor belts" in google http://www.beltcorp.com/profile.html
Electronics Forum | Fri Sep 24 09:49:53 EDT 1999 | C.K.
Hi Folks: We've been having bridging problems on our fine-pitch QFP's, despite thorough inspection of paste height, volume, and placement accuracies....profiles look good also. The bridging is happening after coming out of reflow...one last thing t
Electronics Forum | Mon Apr 17 14:43:35 EDT 2017 | davef
Measurement of Conformal Coating thickness on Printed Circuit Boards [ http://www.defelsko.com/applications/conformal-coating/printed-circuit-boards.htm ] I receive no benefit from the supplier mentioned above. IPC-HDBK-830A, 8.11.1 talks to measu
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