Electronics Forum | Tue Nov 16 18:02:29 EST 1999 | John Holland
What are the main advantages of moving from a 140 degree C FR4 laminate to a higher Tg laminate 180 degree C ?. Would the higher Tg laminate be less susceptable to bow and twist ?. John Holland
Electronics Forum | Tue Apr 28 14:03:03 EDT 1998 | Achim
We want to produce BGA�s which will be see burn in conditions of 140�C / 24h active tested. Now we think about problems for the solderball uniformity. Does anybody know about problems or about special solderball alloys for such productsconditions ?
Electronics Forum | Fri Apr 24 14:34:14 EDT 1998 | Ed Holton
Looking for anyone who has experience with high temperature soldering. Need to determine why solder joints are failing. Thermocycling of unit is -40C to +140C, 30 minute dwell time, 10 sec. transition time Your help is appreciated Ed Holton Hella E
Electronics Forum | Sun Dec 14 23:37:31 EST 1997 | Lioa
Tow used Mk1c chip shooters in good condition whith 140 feeders in China.About 10,000 USD.
Electronics Forum | Tue Dec 11 02:44:26 EST 2001 | ianchan
SMT Experts, Hi, I have a pondering issue, which is : Our current specified Reflow preheat timing is a necessary 100~140sec for the ranges of 100~170Deg-C....obtained timing is 77sec... out of curiousity, if we further fine tune the obtained reflo
Electronics Forum | Thu Jan 03 08:44:08 EST 2002 | davef
The Tg of the resin commonly used in FR-4 is 140�C. Consider checking with your supplier to better understand the specific materials used in constructing your board.
Electronics Forum | Tue Jun 25 16:15:20 EDT 2002 | dason_c
Hussman, I know when the oven temp at around 140F and the relative humidity is below 10% and meet the J-STD requirement but I never see any recommendation from the supplier to store @ this temperature. Can U advise where I can get more information?
Electronics Forum | Wed Jan 05 10:22:55 EST 2005 | Mike B
We're getting an error on our CP643 that we can't seem to make sense of. It's a D1 axis error, but we're only getting it when we run a feeder on device 140. Any advice would be appreciated.
Electronics Forum | Wed Feb 02 18:01:22 EST 2005 | russ
I would call it conservative, but definitely recommended. It sort of depends on your assembly design. We have run 140 boards lead free but are now using the 170. Russ
Electronics Forum | Tue Oct 11 13:56:32 EDT 2005 | jasont
When I was in China for Nepcon Shenzhen (August 2005) I was told the XP 242E's are going as low as $140k USD. Not sure if for real or just a ploy (we are a re-seller). Could also be a regional thing (competition for market share in China).
