Electronics Forum | Thu Oct 14 11:28:38 EDT 1999 | Bryan
We recently started designing boards using 0402's. The geometry was built using IPC specs but our contract manufacturer is having a yield problem. Approx. 20% of the 0402's are tombstoning. He claims the pads should be closer together; .4 mm between
Electronics Forum | Wed Sep 08 17:28:11 EDT 1999 | Earl Moon
| | Has anybody have any experience with Top placement of BGA's. GLue descretes on bottom and then wavesolder.? | | | | | | | Hi Chris, | Why don't you process a double side reflow and use selective wave fixture for wave process. The process w
Electronics Forum | Thu Jun 03 15:00:48 EDT 1999 | Deon Nungaray
.020" pitch spacing. Which have yielded my process excelent results. My main stencil supplier is I-Source in Irvine, CA and has pretty much standardized on 100% lazer cut stencils for competetive pricing. Hope this helps. Deon Nungaray SMT Mfg. Eng
Electronics Forum | Tue Oct 20 18:37:02 EDT 1998 | Jason
Does anyone use the VersaFlow system from ERSA? If so how reliable is it really? and what does the actual repeatability look like? Any maintenance problems or parts issues? ERSA almost promises 100% yield from this machine for our application. That
Electronics Forum | Thu Jul 16 14:29:00 EDT 1998 | Aric Parr
Contact me off-line. I inherited 4 of them. I cannot make recommendations in recorded media. However, yield is very good when PM is done properly. | Howdy, | Is anyone using Seho? Need to know more about 7000 series machines with nitrogen and ultraso
Electronics Forum | Thu Jan 10 17:20:25 EST 2002 | Matt Kehoe
Dont forget, if you dont want to print paste and deal with the challenges of placing components in wet paste, solid solder deposit can save you the cost of the stencil printer, while offering better first pass yields than traditional methods. It just
Electronics Forum | Wed May 22 12:16:14 EDT 2002 | wister
Yes,stencil supplier can give me some suggestion.but all need to be verified again and again.if there is such software can tell us everything about the stencil design? verify if before it be made.I do think it will save time to launch NPI and save ti
Electronics Forum | Thu Jul 18 13:55:29 EDT 2002 | slthomas
Greg, So you mean that on a Class II board with 6000 connections (in our case, the board has about 1800 parts) you would average somewhere in the neighborhood of 540 connections touched up? My gawd, man, what are you building? We'd have to hire ab
Electronics Forum | Thu Mar 27 14:38:44 EST 2003 | MA/NY DDave
Hi kenlchin, Yes, This all helps with these little components that can be affected by the forces created during soldering more so, than their own stabilizing weight. On this tread which started with a composition only proposition, we have seen tha
Electronics Forum | Wed Oct 15 12:38:56 EDT 2003 | mrulien
We have CM's that manufacture products and have established global FPY goals (across all products). My question is, how can I determine if the established goals are appropriate to meet my final quality expecations (at the customer)? Are there indus
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