Electronics Forum | Sat Jan 15 13:13:33 EST 2000 | Mark Wiegold
Steve, Basically in answer to your question, there is no real set number for defects. Defect rates will vary between products and companies. If my company was running the same product as yourself then there is no reason to suggest that the defect ra
Electronics Forum | Wed Jul 14 13:50:11 EDT 2010 | swag
I can't offer much advice on acceptible rates or #'s. From a process standpoint, most of your bridging or insufficient originates in your printer. Look into buying dedicated tooling specifically designed for the build. We use "h-towers" on all hig
Electronics Forum | Tue Mar 01 10:21:55 EST 2005 | davef
IPC Plating Committee is presently working on a specification for immersion tin [IPC-4554 Specification for Immersion Tin Plating for Printed Circuit Boards] as a solderable surface finish. Immersion tin is normally deposited at 30 to 60 microinches.
Electronics Forum | Wed Dec 03 11:55:42 EST 2014 | spoiltforchoice
I think there are several answers: 1)Design Fail - slap whoever created it 2)Fit that connector as a manual process after the PCB is finished. 3)Print side 2 using a jet printer 4) Shield the fragile LGA and reflow it twice anyway. 5)Use a thicker PC
Electronics Forum | Wed Jul 14 18:51:24 EDT 2010 | rway
Thank you. I spoke with our SMT guy, and he stated that there is plenty of board support on the pcb. So it's not a matter of flexing. There just seems to be inconsistancy in the solder application. He did mention that part of the problem is a lac
Electronics Forum | Mon Nov 05 13:33:08 EST 2007 | slthomas
Heck no, I mean we print relatively slower on complex boards, as in 1 inch/sec (25.4mm/sec), and maybe 2 inches/sec. (51mm/sec) on less complex boards. SMT is not a bottleneck in our plant and printing never the bottleneck in SMT, so I see no need t
Electronics Forum | Wed Dec 03 10:44:03 EST 2014 | kkay
We have a smt connector on side one of our pcb that overhangs through the board to the second side. We can't figure out how to print the second side with this part sticking out. Unfortunately we cannot run the second side first due to an LGA that has
Electronics Forum | Wed Jul 14 15:36:34 EDT 2010 | remullis
98% to 99% pass yield should be your target. The previous company I worked for, we were able to meet these goals with most all of our products. It took us some years to achieve this level of pass rate. Of course analyzing and good reporting from some
Electronics Forum | Sat Nov 17 12:58:12 EST 2007 | mika
I agree with previous postings regarding print speed: Solder paste type/versus fine pitch. Question: Is this a double sided pcb with fairly easy component packages on both sides? In such case, consider make the panel like this: Every second pcb in
Electronics Forum | Wed May 27 14:35:52 EDT 1998 | Justin Medernach
| | R&D is currently designing a board with smt components on both sides of the board. They are adding a 16 pin IC Gull wing. on the bottom side of the board. I have asked for only caps and resistors to be placed on the bottom side. Is there a recomm
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