Electronics Forum | Wed May 01 10:16:05 EDT 2002 | davef
Consider contacting Alpha Metals at http://www.alphametals.com/tech_services/index.html
Electronics Forum | Tue Jun 10 16:11:19 EDT 2003 | Fred Matthews
Entering the world of Electrolysis Imersion Silver as a board finish. Have two customers...one using Alpha and the other using Sterling as the silver used in the process. What are the differences? What are the process hits (if any) for the two? Any
Electronics Forum | Tue May 11 10:43:37 EDT 2004 | Melissa
Has anyone experienced problems lately with excess flux residue left on the board after reflow when using Alpha UP78 OSP paste? We are getting a component failure that the designers are blaming on too much residue. Thanks
Electronics Forum | Tue May 11 11:17:36 EDT 2004 | pjc
Nope, haven't heard anything. I'd check your reflow profile, contact Alpha. Also, UP78 is a very old solderpaste product. I would consider switching to one of their newer products.
Electronics Forum | Wed May 12 09:09:56 EDT 2004 | pjc
Yes, old not obsolete. I believe it may be Alpha's first no-clean solderpaste model. Their most current NC model is OM 5000.
Electronics Forum | Thu Jul 29 17:25:43 EDT 2004 | russ
Have you contacted any paste manufacturers? they would most likely be the ones that can help you. Here are a few Kester AIM AlphaFrye FCT
Electronics Forum | Thu Jul 29 20:41:47 EDT 2004 | davef
Too bad you can't use no-lead. Mitsubishi Materials Corp makes very low alpha [spec'd at
Electronics Forum | Wed Dec 15 08:44:50 EST 2004 | cardinal
Hi Patrick, For UP 78 the best profile is also the easiest. Straight ramp to 220-225 1-2 degrees C per second TAL 45-60 seconds drop it staight off The Tech bulletin says the exact same thing. Former Alpha Guy here
Electronics Forum | Wed Jan 04 17:06:20 EST 2006 | samir
All I can say about Alpha and their GOTT-DAMN website is THEY SUCK!! I refuse to register to view product literature... for that reason, Alpha Metals, you won't be looked at for my pb-free paste or bar solder evals.
Electronics Forum | Thu Feb 16 11:42:29 EST 2006 | russ
I use Alpha 857 W.S. for wave is that what you mean? If so, I love this stuff, it solders everything. one downside to it is convection (wave , rework) can dry it out and leave white hazes and even residues at the joints.
