Electronics Forum | Wed Feb 28 14:48:41 EST 2007 | jax
I doubt it's the board house. Check the Laminate being used. When you find out that the laminate is IS410, search the forum for time and location for the next "RoHs Compliant PCB Delamination Support Group" Some of the locations are hard to find but
Electronics Forum | Tue Aug 22 13:05:32 EDT 2006 | Board House
Hi CP, From a PCB manufacturing side, all of our product is Lead free / RoHs compliant if it has a surface finish other than Hot Air. To be ROHS compliant and Able to with stand Lead Free Assembly, this is where the board house would need to switch
Electronics Forum | Tue Sep 18 07:52:29 EDT 2007 | davef
Does the change from supplier to supplier as a result of: * Board definition? * Differences in processing at fabs? 3 Specification Fir Tree General Technical Specification 3a Design/Layout: * IPC-2221 * IPC-2222 3b PCB Fab: * IPC-6011 * IPC-6012 * I
Electronics Forum | Mon Feb 05 11:45:07 EST 2001 | peterbarton
Phil, One source for this information is form the manufacturer Park/Nelco. They have a large website and give specifications for all sorts of laminates, including FR4. Try http://www.nelcointernational.com/parknelco/fr4epoxy.htm. I'm sure that ot
Electronics Forum | Mon Nov 19 19:14:07 EST 2007 | jmelson
I've been running 90% lead-free (still have a couple components I can't get reliably in RoHS compliance) with a peak temp of about 238 C, on standard FR-4 boards. The only real problem is the pad adherence is compromised, making rework of the boards
Electronics Forum | Fri Apr 16 12:47:48 EDT 2010 | boardhouse
White solder mask does have a tendency to yellow within the lead free environment. so double coating will not help any. I due believe the flux is a factor in the yellowing but due to the color is the main reason. Find out what brand of S/M mask they
Electronics Forum | Thu Jun 12 03:37:05 EDT 2008 | benefon
It is also possible to etch the barcodes directly on the PCB by using a laser. The solder resist mask is easily burned by laser and if there is copper underneath the contrast is quite good. The contrast is satisfactory even if there is no metal under
Electronics Forum | Wed Feb 21 05:52:17 EST 2007 | Stephen- SMT engineer trainee
Some of the blister in solder mask, normally 1 circle blister(about 1cm in Dim.) in each PCB. In addition, there are also blister in laminate, the also look like 1 circle blister(about 1cm in Dim.) in each PCB.
Electronics Forum | Tue Mar 07 06:23:56 EST 2017 | rob
Hi Westen, Yes, lots of things cause problems on an physical PCB compared to a simulated PCB. Noise, special laminates, harmonics etc. This is a good starting point: http://www.ti.com/lit/ml/slyp173/slyp173.pdf Rob.
Electronics Forum | Thu Dec 04 09:49:11 EST 2008 | lazzara55
Dear Steven: Often the recommendations for baking prior to assembly are derived from various J-stds. But J's currently concern baking moisture out of components, and fail to address the moisture issues of the PCB. Because of that, there is the IPC D
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