Electronics Forum | Tue Sep 14 13:40:50 EDT 2004 | paul_boxboro
I feel your pain. Your company may already be using Kapton tape labels for their board serial numbers labels. Kapton is able to withstand repeated wash and heat cycles, and can be printed on a typical Zebra printer. The key to a successful and accura
Electronics Forum | Mon Mar 06 07:42:48 EST 2006 | davef
Epoxy inks tend to be more resistant to discoloration than the acrylics that are used more widely now. The acrylic-based inks vary in their ability to maintain color after heat cycles. The technical data sheets from the ink supplier should indicate:
Electronics Forum | Mon Aug 06 15:34:34 EDT 2007 | Hussman
I assume you are ref to top side wetting. In that case you may need to spray the top side of the board with flux to get it to fill. I would suggest ceaning the board afterwards. And yes you can rerun boards through the wave several times. Most pa
Electronics Forum | Sat Sep 20 07:11:28 EDT 2008 | Sean
Hello All, I used to hear that PCB with immersion silver finishing, its non component location pads, tend to be discolour (Yellowish) after went through heat cycle, such as reflow oven. However, if the component solderbility on the PCB is OK, can w
Electronics Forum | Thu Jun 12 12:35:52 EDT 2014 | clydestrum
I didn't even think of running a blade down those scores. I will give it a shot and see. The laminate they're using is Nanya NP-140, if anyone has ever used it or has any info regarding it's issues around something like this. We can see resin weave
Electronics Forum | Mon Feb 09 09:45:16 EST 2015 | saoasasd
Thanks for the support Jax. Our current scenario: Baking - Not allowed for PCBs Washing - Not allowed Heat Cycles - 2 (Bottom and top side). It's a notebook board Our concern is related to solderability because OSP finishing will be seriously imp
Electronics Forum | Mon Jun 05 15:59:25 EDT 2023 | daniel_stanphill
Sorry I thought I had replied to this message. I will admit we took some things for granted in the past. More research has been done to determine how many heat cycles a component can have, if it can be submerged, etc. That said, if you don't have an
Electronics Forum | Thu Jun 08 20:07:32 EDT 2023 | daniel_stanphill
The answer to this lies within the datasheets of the components on the board. Each component has its own specs as far as number of heat cycles, time at reflow, peak temperature, whether it can be washed, etc. You do not need to be as thorough on th
Electronics Forum | Fri Feb 01 10:54:35 EST 2013 | dyoungquist
Regardless of the surface finish, you should try to limit the reflow cycles to 3 with no more than 5 at most. This includes reworking a BGA site as well. Remember that heating/cooling to remove a BGA is one cycle and heating/cooling to place a BGA b
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
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