Electronics Forum | Sat Dec 11 00:58:21 EST 2004 | kanwal324
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Electronics Forum | Thu Dec 16 13:10:30 EST 2004 | chics
100 Centipoise = 1 Poise 1 Centipoise = 1 mPa s (Millipascal Second) 1 Poise = 0.1 Pa s (Pascal Second) Centipoise = Centistoke x Density
Electronics Forum | Tue Dec 07 05:16:12 EST 2004 | kanwal324
We are using solder paste of Alpha Metals 390DH4. As per manufacturer guidelines the viscosity of paste after 1/2 hr. conditioning and after mixing in paste mixer,it shoule be between 800-1250KCP. Our customer is asking for viscosity to be maintained
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 | Wed Jun 08 15:50:32 EDT 2005 | davef
Microshot blasting suppliers that recognize steps must be taken to control potentail dmage from ESD are: * Comco 2151 North Lincoln Street Burbank, CA 91504-3344; 800-796-6626 818-841-5500 F818-955-8365 info@COMCOinc.com http://www.comcoinc.com * CC
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 | Tue Jul 13 17:05:41 EDT 1999 | Stephen Surtees
Looking for a conversion factor for resistance to convert MKS units to/from CKS units thanks
Electronics Forum | Mon Mar 11 14:07:33 EDT 2019 | robl
Hi Ronnie, We are still working with Europlacer on this, but thanks for the offer. One piece of advice, if you are thinking of expanding later go for the max unit with the top hat extension now as once it is built it can't be expanded. Thanks,
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