Electronics Forum | Mon Apr 08 20:43:58 EDT 2002 | davef
Regardless of the design technology of the board, we use shop floor management software that: * Calculates the period that it takes to assemble a job. Obviously, we enter product-manufacturing information [ie, BOM, material receipt dates, process fl
Electronics Forum | Sun Apr 07 18:21:08 EDT 2002 | murt
Hi I am a collage student and I was wondering if anyone could explain to me how you would estimate the trough-put, product and cycle time for a double-sided mixed technology pcb assembly. I would be grateful for any information Thanks Martin.
Electronics Forum | Tue Oct 22 10:23:38 EDT 2002 | davef
ubga and stencil
Electronics Forum | Mon Oct 21 23:48:13 EDT 2002 | harris
Hi: If anyone have the experience with the PCB pad design and stencil design for the uBGA? We meet the problem for it. The component data is 0.3mm diameter and 0.5 pitch. Could anyone tell me the PCB pad dimension, the stencil type and aperture dimes
Electronics Forum | Mon Jun 12 17:03:21 EDT 2006 | pjc
Its in the IPC 600 bare-board specification.
Electronics Forum | Mon Jun 12 13:10:05 EDT 2006 | muse95
Why do they say to specify the depth of the score, rather than the thickness of the web? How does the scoring equipment work? Is it two blades that you can set the separation distance? Or is it one blade, that you have to run the board through twic
Electronics Forum | Mon Jun 12 14:31:08 EDT 2006 | russ
As far as wich is spec'd it makes no diiference since they have reltionship with each other, Cant change one without the other. V score equipment I have seen is one blade and they are run through twice. their may very well be that there are dual b
Electronics Forum | Mon Jun 12 14:33:40 EDT 2006 | pjc
IPC spec is V-score shall not be more than 1/2 board thickness. They should be V scoring 1/4 off top and 1/4 off bottom equally.
Electronics Forum | Mon Jun 12 16:33:39 EDT 2006 | muse95
Which spec is that in? I'm seeing web thicknesses of .015 or thinner being suggested for a .062 board, way thinner than 1/2 the board thickness.
Electronics Forum | Tue Jun 13 08:33:11 EDT 2006 | davef
IPC-2222, 5.3.1 defines the parameters of making scoring cuts and the tolerance of the cuts, but does not specify the cuts. Our spec for 0.062" thick FR-4 boards is: 0.018-0.024"
