Electronics Forum | Wed Nov 05 18:02:48 EST 2003 | gregcr
I also have used square apps on the BGA's, this also allows for a bit more play in alignment of the ball to pad, I am interested in the reasons why to use round apps on 0603's and 0402's ???
Electronics Forum | Tue Dec 02 05:57:10 EST 2003 | ADAM
Can Anyone tell me whether or not vapour degreasing is commonly use for cleaning and degresing popoulated pcb's ? what criteria is used when selecting a vapour degreasing solvent ? Where can I find some application notes on this subject ? Thanks in
Electronics Forum | Mon Dec 22 11:48:45 EST 2003 | donbell
Adam: The last one I saw was in communist China back in '98. I have used Lenape machines with freon in the past but am using spray and ultrasonic cleaning techniques since the early 90's. I'm surprised to see someone asking about them! Don
Electronics Forum | Fri Dec 19 16:58:47 EST 2003 | rontdc
Kev, If I remember correctly, Hollis used calrod preheaters on that machine and they had a reflector under the elements to reflect the radiant waves back to the PCB. You might want to clean the reflector. If it is too far gone, use some Reynolds Wr
Electronics Forum | Wed Jan 28 16:42:21 EST 2004 | davef
Consider what you are trying to assess. Any product with one or more defects will cost you money. Your supplier should be using: 9261 - In-Process DPMO and Estimated Yield for Printed Board Assemblies You should be using: 7912 - Calculation of DPM
Electronics Forum | Thu Feb 05 11:13:44 EST 2004 | jwest
Hi, Looking for positive or negative feedback for a DEK Mk1 printer that is available for purchase. Anyone currently using this printer? Are there still spare parts available for this printer? I believe this printer is 1996 vintage. Any feedbac
Electronics Forum | Wed Feb 11 16:47:31 EST 2004 | Jim Hampshire
We are looking for industry input on solder mask patterns being used with fine ptch BGAs. Undersized mask openings vs. the land/pad, Solder mask defined lands/pads etc. Thank You.
Electronics Forum | Mon Feb 16 16:37:40 EST 2004 | adlsmt
I would try it dry first, we have never used solvents in our SPM, AP-20 or UP2000. Wipe every 4 to 10 boards. Normally dont have to wipe when using epxoy.
Electronics Forum | Wed Feb 18 03:11:23 EST 2004 | Sam
Should I have any concerns with operators using flux for handsoldering, straight out of a 25 ltr drum which is not even thinned dowm to the correct SG level. The flux is Alpha 615-25 RMA based and we use it in our wavesoldering process. Thanks in ad
Electronics Forum | Fri Mar 05 06:59:31 EST 2004 | t_white
We use a SAWA to clean our stencils and it performs quite well on solder paste but not so great with epoxy. Operators find the machine very easy to use and like mentioned before it takes up minimal space and has a lower intial and operating cost.
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