Electronics Forum | Fri Aug 08 07:27:43 EDT 2008 | lonta96
Hi, I'm from a semiconductor package assembly, and currently looking for an offline solder paste inspector capable of true volume measurement. Any recommendation for a machine that can measure paste volume on a leadframe (metal substrate)? I found
Electronics Forum | Thu Apr 15 10:05:26 EDT 2010 | davef
Why not use the same paste volume as you currently use? Alternately, although we haven't used it in a while, doesn't IPC have a very nice paste volume, aperture calculator that could be used for this? Or is it just a pad size calculator used for
Electronics Forum | Thu Jan 03 02:26:12 EST 2002 | arzu
Hello, I need to know the volume spread of solderpaste after screenprinting fine-pitch paste using a nickelformed screen. It is the end-result that counts , so of course the spread of metalcontent in the paste is important too. Can anyone tell me som
Electronics Forum | Fri Aug 08 11:25:04 EDT 2008 | pjc
Try these guys: http://www.solderpasteinspection.com/
Electronics Forum | Fri Sep 25 16:38:56 EDT 2009 | esoderberg
empf issued an excellent study of calculated solder volume in the 90's. It used lotus 123 but is easily used in excel. I have used it for over 10 years. The only thing wrong is with leadless components. the amount of paste required generally is insuf
Electronics Forum | Wed Apr 14 14:51:10 EDT 2010 | jgalarza
After checking some of our stencil data for the correct aspect ratio I found that a few are wrong. I would like to change them from 5mil thk to 4mil thk but do not know how much paste volume I need to keep. We are using 0201,0402, and BGA with 0.80 p
Electronics Forum | Thu Aug 14 23:48:38 EDT 2008 | jeremy
Hello Bart I work with the Koh Young systems. Do you have any sort of data even just X Y posistion and pad or appeture size? If you have I can bypass the Gerber requirement. send me an email at jeremy@christopherweb.com Jeremy
Electronics Forum | Wed Sep 23 12:16:17 EDT 2009 | davef
The US EPA has a Toxics Release Inventory (TRI) program. They may have some information on paste wastage estimation for leaded pastes.
Electronics Forum | Tue Sep 22 10:29:18 EDT 2009 | stepheniii
To how many decimal places? Do you want to have a factor for different screen printer operators? There is no such formula and I doubt there ever will be one with any real accuracy. The stencil house might be able to tell you the total area of the
Electronics Forum | Fri May 21 15:50:41 EDT 1999 | John Thorup
We are running a number of boards with 8-10 25 mil PQFPs on board. Our process is mature with at least 3 years experiance and statistically few opens on the QFPs. Our beloved purchasing department has chased the almighty $ and changed FAB vendors
