Electronics Forum | Fri Jan 04 14:21:35 EST 2008 | ck_the_flip
If all your doing is trying to measure oven repeatability, but then you wanna do it a bunch of times, have a profiling "board" constructed out of say... delmat, delrin, or some other glastic-type pallet material. Have the T/C's permanently fastene
Electronics Forum | Fri Jan 04 09:44:59 EST 2008 | philkaz
Hello, I am Philip Kazmierowicz and I work with KIC, a Thermal Profiling company. We have done many lifetime experiments on Printed Circuit Boards over the years. The key thing to understand is that if the primary material of the board in FR4 fiber
Electronics Forum | Wed Jun 27 21:05:48 EDT 2001 | davef
BGA Cycle 1: solder ball attach. BGA Cycle 2: BGA attach to board. BGA Cycle 3: BGA removal from board. BGA Cycle 4: BGA pad dress. BGA Cycle 5: BGA ball replacement. BGA Cycle 6: BGA re-attach to board. Board Cycle 1: BGA attach to board. Boar
Electronics Forum | Wed Dec 31 08:55:09 EST 1997 | justin medernach
| 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 | Wed Aug 07 16:06:48 EDT 2024 | SMTA-64386252
Hello, You should contact your PCB suppliers and ask them. Most of PCB suppliers did not recommend exposing PCBs to more than 5 thermal cycles.
Electronics Forum | Sun Apr 11 11:39:52 EDT 2010 | manchella
When we have sent some of motherboards for reliability testing in a tird party laoratory. It is found that when Dye&Pry is done after 600 cycles of Thermal Cycling, in LGA socket only one of the corner solder joing had 100% type 3 crack. All other so
Electronics Forum | Fri Jul 12 07:15:45 EDT 2024 | murtaza
Use high tg material on pcbs. Like tg170 or higher. Its a bit more expensive. Board shops usually quote cheapest material just to win the order. When you see fr4 on the quote it usually means tg135-tg140.
Electronics Forum | Tue Apr 13 08:21:05 EDT 2010 | esca
Hi manchella, After ATC test, two different failure modes can be present: solder FATIGUE (into bulk) or BRITTLE INTERMETALLIC fracture. So, first you have to verify this. Moreover, which brand of SMT paste have you used ? The crack into solder joint
Electronics Forum | Sun Dec 10 20:17:51 EST 2017 | myke03o
Hi Dave, thanks for the response. * Improve your products that are used for thermal cycling testing of products of other companies? Yes we want to improve our products to pass thermal cycling and prolong the lifespan of the baord. * Change your pr
Electronics Forum | Thu Nov 23 20:01:05 EST 2017 | myke03o
Hi to all experts, Can anyone advice us what solder alloy to use for thermal cycling products. We are facing a lot of issues using normal solder paste SAC305. After thermal cycling the solder is cracking. Any suggestion is welcome. Thanks in advanc
