Electronics Forum | Mon Aug 27 13:02:32 EDT 2012 | rway
We will look at the oven speed. We considered stiffeners but opted against that due to the risk of moving parts pre-reflow due to handling. 90 deg? I don't know. This may or may not help with the bowing. Considering there is little to no substra
Electronics Forum | Wed Dec 03 11:55:42 EST 2014 | spoiltforchoice
I think there are several answers: 1)Design Fail - slap whoever created it 2)Fit that connector as a manual process after the PCB is finished. 3)Print side 2 using a jet printer 4) Shield the fragile LGA and reflow it twice anyway. 5)Use a thicker PC
Electronics Forum | Mon Aug 24 22:27:52 EDT 2015 | sarason
Your solder looks like it hasn't had time to reflow. Are`the pictures of an aluminium substrate ? So just positing a theory your boards need more soak time, the solder seems to have formed little hills/mountains and then cooled off before the surface
Electronics Forum | Wed Dec 14 20:17:48 EST 2016 | davef
As I understand, you are wire bond gold wire to gold pad, where the substrate has good bond strength, but the die does not. If bond quality is good, and then drops off rapidly, then it's probably something to do with contamination within the system
Electronics Forum | Tue Jan 31 08:59:24 EST 2017 | rob
Hi Joshua, We ran 150K per week this way, you just need a lot of pallets. Regarding dispensing I've seen 0201 (Imperial)paste dispensed, so about 0.4ish mm dots. I'm sure the Mydata printer is also pretty high resolution too, but not too quick.
Electronics Forum | Wed Feb 01 02:11:38 EST 2017 | Rob
Hi Joshua, No, the adhesive lasts 2 or 3 runs. The adhesive is put on manually as is the kapton. It's a big panel for a flex - nearly 300 x 210, so the operator loading the boards onto the pallet and fixing them (then into a buffer) stays well ahe
Electronics Forum | Mon Apr 03 04:04:06 EDT 2017 | soldertraining
Lasers can be used to depanel individual PCBs from panels. In addition, laser depaneling is often used when very tight tolerances are required for PCBs such as when there is very little room in an enclosure that the board is fitting in to. But the ch
Electronics Forum | Thu Jul 13 02:30:29 EDT 2017 | jandon
We are using hot-plate. It is the safest method to rework aluminum substrate PCB's. http://www.martin-smt.de/en/rework/products/pre-heater-hotbeam.html "For efficient rework on heavy electrical systems with flat bottom surface and LED PCBs the pow
Electronics Forum | Mon Sep 10 16:55:29 EDT 2018 | wrander1
Hi, I am looking for a Solder jet supplier. Micronic does not support my small dot size LEADED solder paste. I can not use stencil print because my substrate is fragile. I need a run rate of 10,000 dots per hour and 99.99 % dots +- 10% volume. Equip
Electronics Forum | Mon Jun 10 13:47:23 EDT 2019 | don_julio
First thing we did was visit the profile and we have it adjusted as far as we're willing to take it. I'm just going to make a carrier design in cad and have the board house produce some in their thickest substrate to see how it works out. Thanks.
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