Electronics Forum | Mon Nov 19 10:18:03 EST 2001 | gzweig
There is no question but that x-radiation is an ionizing radiation and can effect components sensitive to ionization . The higher the power level of the x-ray source, the higher the amount of ionization taking place. At low levels of x-ray we have ne
Electronics Forum | Wed Nov 21 05:12:26 EST 2001 | frha
Thanks!! I have bought this book. SPC for SMT by William S. Messina. It is an book with very deep calculations, I need to have the basics on place first - which characteristics may vary from unit to unit and batch to batch. I think that we have a V
Electronics Forum | Tue Nov 20 08:31:26 EST 2001 | rkey
I lost my copy of the software 'CSM TOOLBOX' (and optimizer) Does someone have another copy of it ?? I already contact Philips EMT but they doesn't have it anymore! Does someone still have this software or does someone know where to get (maybe down
Electronics Forum | Fri Nov 23 11:58:18 EST 2001 | Warren Pumyea AMT, Inc.
Hello, I have a copy of the toolbox. Have not used it for a while so I'm not sure about the optimizer. please respond and let me know what e-mail address to send it too. Regards, Warren Pumyea AMT, Inc. Contract Manufacturer 978-840-3070
Electronics Forum | Fri Nov 23 11:58:20 EST 2001 | Warren Pumyea AMT, Inc.
Hello, I have a copy of the toolbox. Have not used it for a while so I'm not sure about the optimizer. please respond and let me know what e-mail address to send it too. Regards, Warren Pumyea AMT, Inc. Contract Manufacturer 978-840-3070
Electronics Forum | Wed Nov 21 10:41:03 EST 2001 | arzu
Hello, Sometimes you have no choice other than putting uvias in ubga's-pads. I know examples of high-end mass production of products with ubgas having voids. (no problems, but always voids visable in x-ray) I also performed a DOE a while ago to avoid
Electronics Forum | Wed Nov 21 21:50:50 EST 2001 | Glenn Robertson
Tony, What you are seeing can occasionally be caused by gaps in the plating of the blind vias. If they are not "airtight" you can get moisture coming from the laminate that shows up as voids in the solder balls. You might check on the board sup
Electronics Forum | Tue Jan 21 16:28:02 EST 2003 | tony_sauve
Sorry I didn't close this one off last year... We had some failure analysis done on these PCB's ( 3D x-ray,microsectioning,SEM) and the results definitively proved that there was some contamination @ the base of the uvia's that had the voiding. It ap
Electronics Forum | Fri Nov 23 00:44:48 EST 2001 | William
Hi expert, I'm doing a research on the SMT market and are in desperate need of some information on the history of SMT. How did everything start? Was there life before SMT? What was the first stage? All information on board handling and SMT is mor
Electronics Forum | Mon Nov 26 20:30:03 EST 2001 | davef
Dirt => Beer => Girls FACT: * Hybrid circuits in the 1960s that were used to conquer space where the genesis of today's SMT. * Japanese commecialized it to build better transitor radios * UIC & Dynapert fought it tooth and nail. UIC finally got t
