Electronics Forum | Tue May 19 11:56:59 EDT 2020 | philc
Do you buy in the PCB's from a manufacturer? If so, they may well offer such a service for you. We get quite a few different boards that come with either Kapton tape, or liquid masking already applied.
Electronics Forum | Fri May 29 14:34:37 EDT 2020 | huske
BEST Inc offers this type of product for custom shape cutouts. You can buy standard circles and squares from many places. soldertools.net/conformal-coating-tapeshapes-laser-cut-3m-type-401-engineering-cad-work/ solder.net/painters-tape-cus
Electronics Forum | Tue May 19 10:28:51 EDT 2020 | smtmartin100
Hi, Our assembly process involves applying Kapton tape to the back side of our device, a laborious cutting and sticking operation. We are scaling up from "cottage industry" so I'm interested to know if you can buy Kapton shapes on a reel cut to our s
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 | 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 | 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 | 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
Electronics Forum | Thu Jan 04 17:26:17 EST 2001 | Cory
We're going to begin conformal coating a few of our assemblies as required by our customer. We're using Kester No clean paste and will use cotton gloves to keep the boards clean while handling. My question is: Do we need to clean the boards prior to
Electronics Forum | Fri Sep 09 15:53:22 EDT 2005 | patrickbruneel
If the white residue is from a no-clean flux or no- clean solder flux core you can leave it on the board. (Consult with the flux or cored solder manufacturer) Because after being encapsulated with conformal coating the residue is sealed from humidity
