Electronics Forum | Sat Jan 03 18:13:58 EST 1998 | David Jacks
Tom: You are right. Pre-heating is just as necessary in rework as it is in intiial production. Zephyrtronics produces an economical convective bottom side pre-heater known as an airbath. This product ramps the substrate and assembly at 2-4 degrees
Electronics Forum | Sun Jan 11 11:28:14 EST 1998 | Bob Willis
Most componnent cracking is mechanicaly produced a guide to causes of capacitor damage is included as a download file on my web page www.bobwillis.co.uk I feel that the supplier is looking to blame some one else. IPC make comment on pre heating chip
Electronics Forum | Sun Jan 11 11:28:12 EST 1998 | Bob Willis
Most componnent cracking is mechanicaly produced a guide to causes of capacitor damage is included as a download file on my web page www.bobwillis.co.uk I feel that the supplier is looking to blame some one else. IPC make comment on pre heating chip
Electronics Forum | Wed Dec 31 23:02:19 EST 1997 | Scott McKee
| Has anyone had any experience with thermal shocking | and cracking of SMD capacitors during the rework process? | My company was advised to preheat capacitors to 125 C | at a rate of 2 C/sec before replacing them onto boards. | Would this maybe
Electronics Forum | Sat Nov 03 05:41:07 EST 2001 | Ben
Hi Could somesomeone help to let me know can bare PCB (FR4) is damaged by thermal shock? Can difference of CTE from copper or solder to FR4 damage PCB from apply heat too fast? Any specification or standard can i refer? Thank you Ben
Electronics Forum | Mon Nov 05 20:34:03 EST 2001 | davef
What�s the problem? There area many heat related failure mechanisms in bare boards. You can damage boards with heat several ways. A couple favorites [Don�t try this at home. Perform on a closed track by professional solders only.] are: * Put a
Electronics Forum | Sat Oct 02 20:19:19 EDT 1999 | John Dwinell
| | I am currently in the middle of a company wide war and I'm looking for data (AMMO). Here are the problems: | | | | 1) I am looking for anyone who has done or seen any reports on Thermal Shock to smt parts and/or via holes caused by Soldering Ir
Electronics Forum | Fri Jun 06 06:11:18 EDT 2014 | paulg
I have a large monoblock ceramic filter on a PTFE based pcb material. The filter has a metal casing soldered onto the ceramic filter. I am concerned that if the heating rate is to rapid, then thermal shock / differential expansion could cause the fil
Electronics Forum | Thu Sep 03 11:31:43 EDT 1998 | Ben Salisbury
| I am in need of possible causes and solutions to capacitors that are failing in the field. | Are there issues in our process that need to be | checked? | Some people said the problems are due to improper | storage. Others say it is thermal stre
Electronics Forum | Fri Feb 20 12:55:43 EST 2004 | russ
Ah, the old contour wave. I don't really know how to adjust those to get correct backflow to reduce your solder volume. I need to ask why you are worried about this. Do you have a QC requirement in excess of IPC class3 wich allows for this joint t
