Electronics Forum | Sat Jul 16 07:46:17 EDT 2005 | davef
If you have a glob of epoxy on your board, it will be difficult to stencil you paste on that side. Dispensing paste may be a better choice.
Electronics Forum | Tue Jul 19 12:10:04 EDT 2005 | CLampron
Sr. tech, The mount tool test position is what I am refering to. The function of this is to determine the placement plane of the board. The mount plane will change if the board is thicker so thickness is relavent. regards Chris
Electronics Forum | Thu Jul 21 14:16:56 EDT 2005 | stepheniii
Tell them every action taken with the boards carries risk of damage. Process steps that don't do anything should be avoided because they carry the risk of causing defects. Even inspection causes the occasional defect, and board handling in general s
Electronics Forum | Wed Jul 20 17:23:19 EDT 2005 | davef
IPC-2222 - Sectional Design Standard For Printed Board For Organic Printed Boards, Table 9-3 � Plated Through Hole Diameter To Lead Diameter Relationships will give you the standard information you require.
Electronics Forum | Tue Aug 02 21:37:21 EDT 2005 | davef
Are we talking: * BGA that you've reballed and want to clean prior to attachment to a circuit board? * BGA that you've attached to a circuit board after correcting something or other? ... and we're talking a water soluble flux or what?
Electronics Forum | Mon Aug 08 21:43:23 EDT 2005 | plcc
Hi Davef, After reflow, the pcb board turns yellowish color. However, the board still pass thru' functional test.
Electronics Forum | Tue Aug 09 13:44:48 EDT 2005 | mtd
The solder on the rest of the board looks good. There are no large components around these parts. We check the profile using a KIC and it met the recommendations of the solder paste manufacturer. I have not did a dip test of the board or components.
Electronics Forum | Wed Aug 17 17:41:58 EDT 2005 | Kris
What is the surface finish of the board ? Some flux are known to react with certain type of board chemistry. Have you verified the compatibility of your solder mask and flux ?
Electronics Forum | Fri Aug 19 04:09:49 EDT 2005 | md
some water managed to leak onto a couple of backplanes boards. The OP. has blown any water off the boards, would these need to be baked ?
Electronics Forum | Wed Aug 24 10:18:19 EDT 2005 | james
Well that Genius did it on this BGA. It does have a heatsink and absorbs alot of heat. It just stinks because the BGA cost over 1000 and I really can not scrap a board. But that first profile does not look correct for this board with the BGA esp.
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