Electronics Forum | Mon Mar 07 06:44:39 EST 2022 | SMTA-64386201
We previously labelled PCBs after assembly but before AOI. Now we need to trace panels during assembly as well, so have the need to apply labels before the assembly process starts. Our stencils are thus not stepped to accommodate labels. I suppose t
Electronics Forum | Tue May 03 07:07:09 EDT 2022 | SMTA-64386201
Thank you, this was exactly the type of guidance that I was hoping for!
Electronics Forum | Thu Feb 24 14:58:11 EST 2000 | Greg denham
Does anyone have any information on baking boards to remove moisture before reflowing and waving assemblies? I've been told that we should do this to stop such problems as delamination of boards, blow holes, solder balls, etc. I don't know have any e
Electronics Forum | Thu Feb 24 14:58:11 EST 2000 | Greg denham
Does anyone have any information on baking boards to remove moisture before reflowing and waving assemblies? I've been told that we should do this to stop such problems as delamination of boards, blow holes, solder balls, etc. I don't know have any e
Electronics Forum | Fri Sep 09 15:03:46 EDT 2005 | Amol
Hi, I am running a circuit board that needs a part to be put on it after cleaning and before conformal coating. the only problem is that after cleaning and hand assembly of the part, there is a thin whitish residue in the ckt board that one can see w
Electronics Forum | Tue Aug 14 10:01:32 EDT 2007 | gmoritz
I have posted earlier on a UIC Radial inserter machine. We have the machine running after repair of the CnC head. However, I now have a process problem with a board that has 256x3 LED parts (768 LEDs in three colors) where only 50% of the LEDs can b
Electronics Forum | Fri Sep 09 15:50:08 EDT 2005 | chunks
The hand assembled part is soldered in? If so, the white residue may be from the operator using some added wave solder flux to get better wetting when hand soldering.
Electronics Forum | Fri Sep 09 17:01:40 EDT 2005 | GS
You can find some input on IPC-HDBK-830 Guidelines for Design, Selection and Apllication of Conf Coating. Also look at IPC-CH-65A, Guidelines for Cleaning of Printed Board Assemblies. Regards...........GS
Electronics Forum | Mon Sep 12 14:08:33 EDT 2005 | Amol
The fluxes used in the board manufacture are RMA fluxes. The board is cleaned according to the IPC standards and tested to ensure quality. I am thinking of designing a DOE to isolate the problem
Electronics Forum | Mon Sep 26 15:12:38 EDT 2005 | Amol
hi, sorry for the late reply. We solved the problem by rinsing the boards in deionized water after alcohol scrub
