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Electronics Forum | Sun Oct 28 23:32:25 EST 2001 | flynhi34
Thanks for the info on the printers. I have printed conductive epoxy on Dek 265 with great success in the past. The issue I have is that I need to attach with both epoxy and solder on the same side of the PCB. I could double print. Print conductiv
Electronics Forum | Fri May 02 09:37:23 EDT 2003 | Jerry Magera
Via in pad is the most efficient use of space. Blind via seems to be blamed for this. Cross-sections (send me some) will probably show a void still existing in the via or spherical voids aligned near the component pad side. One can estimate the vo
Electronics Forum | Mon Nov 26 23:05:05 EST 2001 | ianchan
M.Parker, thanks a million!
Electronics Forum | Thu Dec 06 19:46:08 EST 2001 | davef
First, we�re assuming that we�re talking hot air solder leveled [HASL] bare boards, eh? Consider using A-600 - Acceptability of Printed Boards as the basis for discussing the bare board problems. It is the bare board analog of A-610 - Acceptability
Electronics Forum | Tue Jan 15 06:05:37 EST 2002 | Romain
Dear all We have since few weeks problems with BGA solder joint integrity on ENIG finish. Under relatively very flexible of the FR4, the joint breaks between ball and PWB. When we take off the BGA for analysis, some of the pads seem very flat, totaly
Electronics Forum | Wed Jan 16 20:05:04 EST 2002 | davef
Look here http://www.infoxpress.com/reviewtracker/reprints.asp?page_id=916
Electronics Forum | Wed Jan 16 12:04:45 EST 2002 | dason_c
You can use the IPC-7525, Stencil Design Guidelines for start up.
Electronics Forum | Thu Jan 24 09:53:56 EST 2002 | davef
You didn�t tell us about your solder, wave temperature profile, or the distribution of the problem. So, let�s assume the solder is near eutectic and the problem is wide spread. Wolfgang makes good points. So, let's talk a different tact. When we
Electronics Forum | Wed Jan 30 08:30:33 EST 2002 | seto
Hello Dave, Mechanically the conection between the component pad and PCB pad is good (the solder joint is very strong). The problem is associated with poor contact after the use by the customer (vibration, temperature, etc). You can see the pictures
Electronics Forum | Tue Feb 05 19:41:01 EST 2002 | PeteC
I sent you an e-mail with an attachment of a troubleshooting chart for wave and reflow.
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