Electronics Forum: alpha 709 issues (Page 1 of 11)

Murata cap wetting issues

Electronics Forum | Tue Apr 17 10:22:16 EDT 2001 | tom g

Has anyone out there had solder joint wetting issues with Murata ceramic chip caps, in particular with Alpha UP78 no-clean paste? We are finding that changing either the paste or the vendor corrects this problem. If so, please advise your solution(


Electronics Forum | Tue May 17 21:53:24 EDT 2005 | KEN

...circa 1996.


Electronics Forum | Mon May 16 07:18:40 EDT 2005 | davef

We agree with an earlier poster. Try it and carefully observe the results. We agree with earlier comments. Consider a paste with a more current design. WS709, while SOA in it's day and still a very good paste, is dated.


Electronics Forum | Tue May 17 08:56:45 EDT 2005 | cyber_wolf

Never mind then. Must be the Borg collective you are speaking of.

BGA Reflow Issue

Electronics Forum | Tue Apr 18 10:42:27 EDT 2006 | Carol Stirling

Hello All, Could someone offer suggestions to cure poor BGA reflow that is limited to the same area of the BGA and on one type of board only. The reflow has the look of "baseball caps" and is positioned such that it is the leading edge only that doe


Electronics Forum | Sun May 15 22:49:18 EDT 2005 | techknow..

Tech sheet says that sealed container should not exceed 7 days....I have a container that has been out for nine days, what do you think????? Has anyone any similar experience or pointers ??


Electronics Forum | Mon May 16 09:42:31 EDT 2005 | cyber_wolf

Dave, When you say "we", who do you mean ? The company you work for ? Just curious. Thnx, Sr.


Electronics Forum | Mon May 16 06:36:51 EDT 2005 | steve

I see what you mean. Personally I would try a bit of the paste and see what you think prior to production run. If I were you I would get another brand in there. something that offers a "slightly" longer life? I have used "out of date" solder paste ma

Type 4 solder paste

Electronics Forum | Tue Apr 13 14:14:59 EDT 2004 | russ

I have actually printed this same condition with type 3 paste Alpha WS709. I posted this for discussion and cannot remember what I called it. We did need to clean the stencil after every three prints. I did not check volume on these locations but

Immersion Gold

Electronics Forum | Sat Jun 26 15:26:10 EDT 2004 | russ

I am very happy with Alpha Metals WS709 or even WS609. Almost all of our product is Immersion gold and we place down to 16mil pitch every day along with 0201 and uBGA. Immersion gold from my experience, solders extremely well with every paste I hav

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