Electronics Forum | Fri Jun 03 14:31:33 EDT 2005 | Peter
I am working on an application requiring removing BGAs from a board coated with parylene. These BGAs have low standoff with less than 0.015" after SMT soldering. Can some comment on a reliable and consistent process to perform such rework? given tha
Electronics Forum | Wed Jun 08 13:06:36 EDT 2005 | jimby
You will have to machine the part off down to the top of the balls. Wick solder off from individual sites one at a time. All that will be left is Parylene shell where balls once were. Take an orangestick and alcohol to break up and remove. Tricky par
Electronics Forum | Mon Jun 13 07:44:15 EDT 2005 | bandjwet
Peter: Based on our company's experience with removing a variety of different coatings, including parylene, the BGA's can be removed. We would use a chemical etch followed by a neutralizing process. We would then reflow the devices and pry them off
Electronics Forum | Fri Jun 03 16:35:40 EDT 2005 | davef
We've never tried to remove Paraylene from a BGA, but we stayed [in seperate rooms] at the Red Roof Inn. Parylene/Paraxylyene is a great coating and can be selectively removed by several methods. IPC-7711 (Rework of Electronic Assemblies) has a sect
Electronics Forum | Wed Jun 08 15:50:32 EDT 2005 | davef
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Electronics Forum | Thu Sep 08 18:41:17 EDT 2005 | bhu
Try parylene. http://www.vp-scientific.com/parylene_properties.htm
Electronics Forum | Mon Feb 09 15:41:38 EST 2009 | diamondmt
I would be glad to help you out in recommending a couple of coating choices,(at a very competitive price) but I believe you will have the most success with Parylene coating as long term reliability looks to be very important as well as flexiblity. Th
Electronics Forum | Wed Oct 05 04:32:49 EDT 2016 | piyakorn
Rinse IPA 5 Min --> Treathment/soak IPA50%+SILENT50% 5Min --> Baking 60C/30Min --> Parylene coating (around 8Hr in chamber) --> Found defect spot. We have simulated and ensure board drying before parylene that still have spots. Need help - Thank y
Electronics Forum | Tue Sep 08 16:32:23 EDT 2015 | duso02
Commonly done with Parylene.
Electronics Forum | Thu Oct 06 21:46:32 EDT 2016 | piyakorn
am worrying on a hight temp that will affect to others components mounted on board or not such ICs.. Thank you davef -
