Electronics Forum | Thu Dec 22 04:34:47 EST 2005 | rlackey
11,000 parts? Easy life. We have 66,000 lines in stock & about 500,000 on the system. We've added extra fields on the database for every part number with ROHS status, MSL, PBT, & end termination info added. We've also had to create duplicate part
Electronics Forum | Thu Dec 22 15:36:03 EST 2005 | CC
In general two step temperature reflow process requires minimum 40 deg C delta to be sucessful. We are not using vapor phase soldering but we have similar situation when we change to SAC lead free solder for PCB component population and secondary swe
Electronics Forum | Thu Dec 22 16:12:51 EST 2005 | chunks
Off the Cuff Answer: Wow, nice big ugly connector! Thought we were the only ones using these things designed during the Korean war. Actually it really depends on the customers print. If they want conformal coating, they should know exactly where
Electronics Forum | Fri Dec 23 09:03:04 EST 2005 | samir
I'd like to wish everyone a Merry Christmas too, and if you are offended by that, I wish you a "Happy Holidays." I pray to Allah myself, but I do respect the traditions in America. America was founded by Christians, but I see a disturbing trend whi
Electronics Forum | Mon Dec 26 10:45:40 EST 2005 | davef
+85*C. * Wave solder preheats are >100*C just prior to entering the wave * Temperature changes between exiting the chip wave and the laminar wave can swing through >100*C * Do not exceed 3*C per second maximum rate of change in temperature. Generall
Electronics Forum | Mon Dec 26 13:24:12 EST 2005 | mariss
I'm assuming the fracture in tension; the fracture doesn't show even at X50. The broken edges are that clean. I would expect spalling at the fracture edges if it were a compression or torsional fracture. This makes me belive the board expands and pul
Electronics Forum | Mon Dec 26 22:28:33 EST 2005 | davef
Putting aside that you want to: * Get this mess cleaned-up as soon as possible * Stop spending money on this issue * Get your volumes back to plan ... and all that other production meeting stuff We'd be very nervous about shipping the X7R dielectric
Electronics Forum | Fri Dec 30 11:54:53 EST 2005 | John S.
Seen cap cracking before. It can be caused by thermal stress as noted above, but don't discount mechanical stress and handling. Your depanelization method is a strong candidate. We applied strain gages to baords and benchmarked various mechanical
Electronics Forum | Thu Aug 16 14:25:17 EDT 2007 | doug
Hello Angie, Have a look at http://www.focalspot.com... FocalSpot, Inc. is recognized worldwide as a leader in the design and manufacture of affordable high-quality x-ray inspection systems. FocalSpot also sells, reconditions and supports pre-owne
Electronics Forum | Wed Dec 28 21:18:12 EST 2005 | davef
You don't TS bond gold wire to nickel [of ENIG] for the same reason that you don't TS bond gold wire to hard gold. [Nickel or maybe cobalt is used to harden soft gold.] Together nickel and gold produce unreliable bonds. Look here: * http://www.smta.
