Electronics Forum | Tue May 12 22:57:30 EDT 2009 | davef
Polyimide bare board with tin over nickel solderability protection.
Electronics Forum | Wed Jan 07 17:39:26 EST 2015 | duchoang
Additional info: I use SAC305 solder paste on Enig PCB.
Electronics Forum | Tue Sep 11 11:40:17 EDT 2007 | shing
Please help to answer me the followings questions: 1. The optimum temperature for IC reapir (TSOP & BGA), since many IC found defective after reapir by hot air gun 2. How many time does a IC(TSOP & BGA) can pass throught the IR Reflow without defecti
Electronics Forum | Wed Jan 07 17:34:52 EST 2015 | duchoang
Customer puts our board to thermal test. Test cycle is -55c to 85c, repeat cycle in 15-20min. After 600 cycles, lot of TSOP joints are cracked, leads lifted. There are reasons such as thin PCB, mechanical impacts, warped PCB... My question is, how lo
Electronics Forum | Wed Jan 12 10:05:20 EST 2005 | Dreamsniper
we are using polyimide boards 6 inches x 7 inches, 2.5mm thick, 12 to 14 layers, for aerospace industries. I am using a long bake of 12 hours at 70'C prior to manufacturing or exposure to elevated reflow and wave soldering temperature. If schedule i
Electronics Forum | Tue May 12 10:02:52 EDT 2009 | dwl
I am trying to develop a process for building high environmental temperature PCBs (150-225C) specifically for down hole applications. I'm specifying an evaluation board and was thinking about using polyimide PCBs with Sn05Pb92.5Ag2.5 solder. What so
Electronics Forum | Tue Dec 16 14:26:33 EST 2003 | russ
Has anyone possibly moved the location of your thermocouples? if not check the calibration of your temp controllers/ thermocouples. Russ
Electronics Forum | Wed Dec 17 14:39:18 EST 2003 | Dean
How do you know your profiler is correct? Do you have a pyrometer you can verif the PCB temp with?
Electronics Forum | Fri Dec 19 16:58:47 EST 2003 | rontdc
Kev, If I remember correctly, Hollis used calrod preheaters on that machine and they had a reflector under the elements to reflect the radiant waves back to the PCB. You might want to clean the reflector. If it is too far gone, use some Reynolds Wr
Electronics Forum | Tue Nov 15 11:21:32 EST 2005 | davef
Which is it: * Wire bonds don't stick when bonded * Wire bonds fall off, or break during service
