Electronics Forum | Mon Jul 26 14:14:51 EDT 1999 | Steve Gregory
| | | We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. | | | The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is th
Electronics Forum | Wed Oct 20 17:59:41 EDT 2004 | Grayman
Steve, I have also requirements for this machine. I was able to evaluate some of these machines but the result was not ok. It burn the PCB especially if you have 5mm thick PCB. If you can find one that doesn�t burn PCB please let me know as I am als
Electronics Forum | Wed Dec 01 17:05:51 EST 2004 | grayman
We looking for a new technology Laser PCB cutting. We have tried some laser equipment and the result was burn PCB. Can anyone suggest the best laser manufacturer for this application and if you have tried this process? Your help is highly appreciate
Electronics Forum | Thu Jun 12 03:37:05 EDT 2008 | benefon
It is also possible to etch the barcodes directly on the PCB by using a laser. The solder resist mask is easily burned by laser and if there is copper underneath the contrast is quite good. The contrast is satisfactory even if there is no metal under
Electronics Forum | Mon Mar 02 15:07:28 EST 2009 | snsmt
Hello All, One of our operators recently placed a PCB inside our reflow and when the PCB came out, the board was dark green! My question is, what would determine if this board is acceptable or not? I tried searching it, but couldn't find a re
Electronics Forum | Wed Mar 04 10:36:10 EST 2009 | milroy
Hi If you mean your PCB stayed in the Reflow oven more than the reflow time required for the solder paste specs then I suggest to throw away the board because it would lead over heated solder joints all over the board. Think what could happen to an
Electronics Forum | Mon Mar 02 15:38:08 EST 2009 | kpm135
I would take the board in question and run it through again with your profiler to verify that no one has messed with your oven recipe, or your oven isn't malfunctioning. Also, a before and after pic attached to the post would probably be helpful to a
Electronics Forum | Thu Mar 05 09:46:12 EST 2009 | davef
Solder mask requirements: * IPC-6012 and IPC-SM-840 contain detailed specifications and information regarding solder mask requirements. * IPC-A-600 defines acceptability of printed boards [analog of A-610 for board assemblies]. Why can't you use A-6
Electronics Forum | Thu Mar 29 09:47:12 EDT 2012 | blnorman
In a previous life we burned bar-codes on PCB with a CO2 laser. Initially we placed a small white epoxy pad to burn the code into. After some experimentation we found that we could eliminate the epoxy and just burn through the soldermask and the un
Electronics Forum | Tue Nov 07 12:07:10 EST 2023 | tommy_magyar
We are mounting an microphone device (SMT package) onto a PCB - how? Surface mount line or hand soldering? Contamination can only come from the solder paste, solder wire, flux, or burning the component/PCB assembly during hand soldering. Unless the
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