Electronics Forum | Tue Feb 03 15:23:21 EST 2009 | gregoryyork
Hi George This is down to the different cure temperatures used during PCB process. No problem with the flux or your settings You should be seeing a waxy greasy oil like substance on the dirtier board. Or the resist has absorbed the flux residues not
Electronics Forum | Wed Feb 04 16:33:40 EST 2009 | davef
Your specification for all PCB suppliers of 'solder mask over bare copper using LPI on external layers (green)' is broad and open to the use of material from many possible LPI suppliers by your board fabricator. In at least one case, it appears that
Electronics Forum | Mon Feb 02 16:31:09 EST 2009 | shanebeard
I turned on my standard Philips Topaz today, and the vision system did not come up with the rest of the machine. If there is anyone out there that could walk me through troubleshooting this problem, it would be greatly appreciated. I'm thinking the
Electronics Forum | Mon Feb 02 16:45:05 EST 2009 | alexander_jw
Looking for a clear conformal coating that can protect a PCB outdoors in Southern CA. Board is 24" x .25" x .03125. Require product to withstand some flexing during installation because of its very thin profile. Must hold up to environment for 10yrs+
Electronics Forum | Mon Feb 09 15:41:38 EST 2009 | diamondmt
I would be glad to help you out in recommending a couple of coating choices,(at a very competitive price) but I believe you will have the most success with Parylene coating as long term reliability looks to be very important as well as flexiblity. Th
Electronics Forum | Tue Feb 03 10:44:56 EST 2009 | lmartenson
We have been having problems placing a domed LED with a Mydata HYDRA. The pocket that the part comes in seems to have some slop causing the part to be picked crooked. We have been playing around with different custom tools. Has anyone had similar
Electronics Forum | Tue Feb 03 12:39:16 EST 2009 | markhoch
Not sure what your job quantity is, or how many total parts you have to place, but we've had similar issues in the past trying to place domed LEDs. We had better luck cutting the tape into 25 or 50 piece strips and using double-sided tape to put the
Electronics Forum | Wed Feb 04 09:18:57 EST 2009 | stepheniii
You need to profile to the paste. And if a part can't take the temperatures, then you have to have something done about the parts. At one time most components had peak temperature information back when we didn't really need it becuase profiles were
Electronics Forum | Thu Feb 05 09:50:00 EST 2009 | mlimberg
Smartasp, Certain software packages used with Reflow Profilers have a tab where individual TC's can be set to a different spec. This will allow you to monitor package temps while still monitoring the solder paste specifications. You can define each
Electronics Forum | Wed Feb 04 08:39:46 EST 2009 | smartasp
Hi The issue is not the equipment or any other technical matter. The point is that the argument is about the 10 deg C higher melting point. The process window of SN/CU is somewhat smaller but manageable. I know Nihons web site but found not enough i
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