Electronics Forum: maximum (Page 1 of 57)

maximum number of reflow cycles for rigid PCB?

Electronics Forum | Thu Mar 15 21:09:07 EDT 2007 | KEN

Cecil, the board is a component.

maximum number of reflow cycles for rigid PCB?

Electronics Forum | Thu Mar 15 09:58:22 EDT 2007 | KEN

Anyone know which IPC document covers this? Me thinks 6....but want the IPC spec. to back this up.

maximum number of reflow cycles for rigid PCB?

Electronics Forum | Thu Mar 15 10:28:46 EDT 2007 | cecil

Just askin but why would someone even want to subject an assembly to even 6 reflow cycles? As far as how many cycles that an assembly can be subjected to, wouldn't that be determined my your components?

maximum number of reflow cycles for rigid PCB?

Electronics Forum | Thu Mar 15 20:49:16 EDT 2007 | davef

There is no IPC document, nor should there be. Look here: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=48102

maximum number of reflow cycles for rigid PCB?

Electronics Forum | Thu Mar 15 12:33:50 EDT 2007 | ck_the_flip

To do a profile at most companies, if you don't have a scrap board handy, you'll use the already-soldered board that's already been through ONE reflow cycle. You spend time attaching T/C's with the aluminum tape - after all, the prep-work is half th

Re: BGA voids

Electronics Forum | Wed Feb 09 06:35:18 EST 2000 | Mark Williams

Hi We use 2 criteria... maximum void size is 10% of the solderable surface and a maximum area of voids of 10% of the maximum cross-sectional area of the ball. Any views Mark

Maximum Overprint

Electronics Forum | Tue Jun 28 11:31:23 EDT 2005 | kennyg

Anyone know of a maximum solder overprint formula? I need to overprint a 0.011" wide aperture but want to go out to 0.050" overprint. This seems extreme, but necessary as I can't go out in width due to numerous issues. It seems like one could come

Land pattern design

Electronics Forum | Wed Oct 31 11:01:02 EST 2001 | dougie

Hi Dave, Thanks for the suggestions. To clarify a couple of the points... - What do you qualify as "small" & "large" parts? - Do not make the pad narrower than the lead width. The nominal or the maximum? If I use the maximum width I'll be back to s

Maximum PCB width

Electronics Forum | Mon May 23 06:38:27 EDT 2005 | geb

How do you find out what it is configured to, and change it. Why would it be lower than its maximum capability?

Maximum PCB width

Electronics Forum | Mon May 23 08:21:36 EDT 2005 | Dave G

Things that lower the maximum Board width: Nozzle changers,dual lane vs single lane, staged vs classic board handling, PTF, Comp Shuttle. Moving the changers into the feeder banks will increase your max avail width provided a shuttle or ptf are no

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