Electronics Forum: dfm and dave (Page 6 of 23)

Re: solder balls and flux

Electronics Forum | Wed Mar 01 16:58:03 EST 2000 | Dave F

Robert: On your balls: Solder suppliers make several "standard balls" and can advise you. On your cleaner: Recycling water / direct to drain? Most batch cleaner suppliers can advise you on recycling and filtering systems to keep you out of troub

Desiccants and pcb finish degradation?

Electronics Forum | Tue May 22 08:43:05 EDT 2001 | ohboy

Wow! I'm going to apply for something at Desiccare, I think... I found similar things about desiccants, but mostly material related stuff, also some concerns more about the indicator card than the desiccant. Nothing conclusive. At the moment, I

Re: Reflow glue and past.

Electronics Forum | Wed Feb 09 22:33:27 EST 2000 | Dave F

All: I don�t think this isn�t what Charlie was asking about, but since he�s got our juices flowing on the topic, does anyone have a sense about running paste and adhesive at the same time, beyond the issues that we spoke about in responding to Charl

seperation of soldermask and pcb

Electronics Forum | Tue Mar 25 13:55:05 EDT 2014 | horchak

Ok lets put it this way. If the PCB house used a high quality mask and properly applied it to a properly cleaned surface and properly cured it, then as Dave stated above there are only two things that can destroy it. Excessive heat and overly aggress

Re: Intermetallics and reflow profile

Electronics Forum | Wed May 03 20:24:22 EDT 2000 | Dave F

MF: I know of nothing that addresses your question directly. Let me suggest: * Technical types at your solder supplier should be able to help. * "Effect Of Intermetallic Compounds On The Thermal Fatigue Of Surface Mount Solder Joints" PL Tu, et a

Re: Reflow glue and past.

Electronics Forum | Wed Feb 09 21:29:28 EST 2000 | Dave F

Charlie: People cure glue using their paste reflow profile all the time. And most of them are happy. Personally, I�m with Dean and Travis. It�s possible to as you suggest, it�s appealing not to mess with your oven profile, but it just doesn�t s

Re: Thanks chartrain and Doug

Electronics Forum | Fri Nov 05 09:52:44 EST 1999 | Dave F

John: Three things: 1 You are correctamundo!!!! What's the difference between slopping alcohol on dirty boards and washing dirty boards? Clean boards!!!! By the time those very nice people get done with their alcohol cleaning (a nip for the boar

Palladium finish and solder balls

Electronics Forum | Thu Jun 27 11:22:03 EDT 2002 | robbied

Hi there. We have had an out of control reflow oven that has allowed its temperature to fluctuate by up to +/- 20 deg C from set point in very short periods of time. We found the root cause of the problem and fixed it, but by then we had already run

mirae pick and place machine

Electronics Forum | Tue Apr 15 15:23:10 EDT 2003 | davem

I would agree with the advice given by previous poster's. "Buyer Beware" is the rule of the day. Especially when dealing with 3rd. party brokers. Keep an eye out for some of the teir 1 EMS corp's auctions. You can pick up some excellent deals on we

paste Sn42/Bi58 and Lead Finish

Electronics Forum | Wed Nov 07 15:01:18 EST 2012 | nikyta

Thanks Dave , my question is about Spopov want to try "Lead Free" SnBi (but uses it on Leaded finishes), but is worry about its low melting point (at this point, no longer 138 degrees as he wrote, but rather in an unknown and unpredictable range bet


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