Electronics Forum | Tue Oct 24 08:07:42 EDT 2006 | markb
We are experiencing an issue with RoHS boards delaminating during SMT. In tyring to determine root cause, our board mfg house states the issue is with the laminate. The laminate supplier states that the board house is not taking the proper precua
Electronics Forum | Tue Nov 07 18:18:03 EST 2006 | Andrea
I am wondering how to move from hand soldering our ceramic caps to doing a reflow type process. The reason for the change is too many cracked ceramic caps. I have asked our vendors to assemble our boards via reflow but because of our hardware (swaged
Electronics Forum | Thu Nov 30 11:30:31 EST 2006 | billwestiet
I like this definition the best. After years of sales of pick and place and other, this is always still a topic of discussion. If your customer's cycle time involves building a board in two different machines, then I would suggest measuring and add
Electronics Forum | Mon Mar 12 08:00:14 EDT 2007 | rgduval
It sounds like you may be thinking of two different test methodologies. What is required? Bare-bard testing, to verify pcb fabrication? Or populated board testing, to verify manufacturing? If it's bare board testing, the fab house should advise a
Electronics Forum | Wed Jun 06 10:41:30 EDT 2007 | rgduval
I think everyone has experienced this issue at one time or another. We receive or design one-up's, and let the board house recommend panel size. Unless there's a process specific reason for us to define the panelization. We then approve the array
Electronics Forum | Wed Dec 12 12:08:30 EST 2007 | realchunks
Yes, you can ask for scrap boards, buy Dummy boards/parts or engineer off past runs. For this cost, I would profile, profile, profile. I would make/buy a dummy board. If you don't have one this thick, glue/ adhesive/ bolt some scrap boards togeth
Electronics Forum | Tue Nov 25 11:35:11 EST 2008 | wavemasterlarry
Listen, I conqure with with wAyne on this one as your board house is always gonna the first person y a blame if you haven't adjusted any process paarameters in a while and see board related issues that can be traced to the board house. I once though
Electronics Forum | Wed Apr 16 11:29:31 EDT 2008 | mmjm_1099
Per Tony SMT Here are more photos: Q15, Q16, Q17 represent good transistors on a 1 up board with the transistor locations that are in question. Q13 is a good transistor on a bad 2up board. Right next to it is Q14 a bad transistor on a bad 2 up boa
Electronics Forum | Fri Oct 23 08:24:52 EDT 2009 | rgduval
Eric, I haven't used this oven; but, our Heller has built in profiling. Essentially, attach the thermo-couples to a board, and the appropriate point on the oven, and run a board (without parts). Your paste manufacturer will have published a reco
Electronics Forum | Tue Apr 06 14:45:52 EDT 2010 | stepheniii
You would be suprised what you can see with even a simple Xray machine. The engineers upstairs wanted to see if the xray could confirm there was an open via on a thin dense board with several layers. I thought (but didn't say) no way. But with carefu
