Electronics Forum | Mon Sep 29 17:31:39 EDT 2008 | davef
Q1.Does anyone know a way to verify the amount of OSP coating on a board? A1. There is no specification. Thickness is difficult to measure. Thickness is product related. There are at least six major suppliers. Years ago, here on SMTnet, J Medernach s
Electronics Forum | Mon Jul 23 16:15:55 EDT 2007 | davef
Josh: Do you measure the thickness of the coupon prior to coating or do you peal the coating and measure that?
Electronics Forum | Mon Jul 23 17:49:04 EDT 2007 | davef
We know nothing of DeFelsko, but do understand how they distinguish between the solder mask and the conformal coat. DeFelsko manufactures hand-held, non-destructive coating thickness gages that are ideal for measuring the dry film thickness of confo
Electronics Forum | Mon Jul 23 16:13:43 EDT 2007 | davef
It's it curious that NASA requires 'Thickness measurements shall be made with a wet film thickness gauge or equivalent tool' yet specifies 'cured thickness' as a measure. Why do you recon they do that?
Electronics Forum | Thu Mar 26 10:03:29 EDT 2009 | sachu_70
How do you intend to maintain uniform coating thickness using a paint gun, besides ensuring coating consistency? What is the application you are looking at?
Electronics Forum | Tue Jul 24 13:41:41 EDT 2007 | jdumont
We just measure the coupon before and after. We are always btw .002" - .003" acrylic. No auditor will say a word if you are doing this much control. Unless its NASA I suppose..... we've never had a problem with any of the avionics guys doing this tho
Electronics Forum | Mon Oct 25 11:15:10 EDT 2004 | davef
We assume by "stencil tension" you mean a measurement of how securely [or how tauntly] the stencil foil is held in the stencil frame. If so, we do not know how you would go about making your "30 ~ 50 N/cm" limit measurement when verifying conformanc
Electronics Forum | Tue Oct 06 15:50:12 EDT 1998 | Bill Tuttle
We are experiencing poor wetting on various components placed on a PCB with En-Tek coating. Is anyone else experiencing simular problems ? We have the following questions: 1. How can the thickness of the En-tek coating be measured? 2. Is En-tek vol
Electronics Forum | Sun Feb 04 15:06:20 EST 2007 | Scotty
Profile should have a longer cool soak. Verify as was mentioned all pin/fixture support through out the entire process. Print, Place, pre reflow hand load, post reflow, carriers, ICT, Depanel and FCT. Conformal Coated or Potted? Mylars work well for
Electronics Forum | Tue Oct 09 20:27:13 EDT 2001 | davef
That�s a 672 BALL BGA, bud!!! It�s a BIG Mutha!!! [I know. I know. For some reason suppliers call balls "pins".] Let�s focus on: * Clarifying the units on your PCB and aluminum plate thickness measurements. * Describing your use of the aluminum pl
winsouce.jpg)
.gif)
.gif)
