Electronics Forum | Tue May 15 21:57:06 EDT 2001 | davef
Welcome!!! Where the hay ya been??? Sorry bud, were lining-up with your fab [it hurts me to say that, but when yer ] We used to dry pack with desiccants, also. Its probably an old MIL-STD-2073-1C requirement [er something like that]. We qui
Electronics Forum | Mon Nov 12 16:14:47 EST 2001 | davef
Yes!!! How can we assemble boards with 20 pitch when we allow 0.008� error to the master art? Excellent question!!! IPC-D-300G has nothing to do with assembler requirements. It is written by and for fabricators, so that they can be comfortable.
Electronics Forum | Sun Jun 07 02:06:26 EDT 1998 | Earl Moon
| Earl, | As always, I am interested in what you have to say, but I am still a little vague on your application of ANSI Y14.5 as it relates to the manufacturability of an assembled printed circuit board. Are you implying that component placement coor
Electronics Forum | Tue Jun 25 01:24:25 EDT 2019 | sssamw
That is possibley CTE mismatch between QFN and PCB material, the thicker PCB the higher fail rate.
Electronics Forum | Wed May 07 15:26:05 EDT 2008 | joeherz
Interesting - We're using the same AIM products as you. On the lead free, 353, did you start out with it or did you try the WS485? That was the 1st product recommendation we got from AIM and we found that the lot to lot consistency was not good. T
Electronics Forum | Wed Oct 10 12:22:08 EDT 2001 | Kevin
Cal, There are several suppliers of cover tape materials that do not require heat to activate the adhesive. 3M and Advantek are likely the leaders. There are relatively few T&R machines that can handle both heat and non-heat applications - as Chri
Electronics Forum | Mon Apr 25 17:07:11 EDT 2005 | rush316
You indicate that PBBs and PBDEs are included in FR4 materials!! Does this include PCB (Printed Circuit Boards)??
Electronics Forum | Thu Jul 06 12:06:12 EDT 2006 | pavel
Rob, do you have any tip on reliable supplier of "really flat" flexible pcb? We tried several but all with issues. Thank you. Pavel
Electronics Forum | Wed Jan 12 13:42:19 EST 2011 | dwonch
Hi All, I'm hoping there is a PCB expert or two hanging around. We're having some solderability issue on our boards. The finish is ENIG but it doesn't seem to be related to the finish process itself. We did SEM and EDX analysis and found aluminum an
Electronics Forum | Thu Jul 06 13:36:37 EDT 2006 | SWAG
We've had much trouble with flex circuits. As previously mentioned, you must have local fids for the board or the BGA itself (if panelized). Other troubles we experience are drilled holes for pinned connectors. Unless the PCB manufactur has some w
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