Electronics Forum | Wed Nov 12 13:00:58 EST 2008 | cisridn
I have to build test fixtures for RF Power transistors. These components generate alot of heat so the PCB is soldered to a baseplate. The problem I am having is that I am getting too much solder flowing thru the via's and flooding the topside of th
Electronics Forum | Wed Nov 12 22:34:30 EST 2008 | davef
How about plugging the via with a temporary solder mask or coving them with thermal tape?
Electronics Forum | Sun Nov 16 14:33:18 EST 2008 | cisridn
Think of the money you'll save. Your boss will be > ecstatic!!! And you, you'll have time for a > coffee and to chat-up that cute lil' so-and-so at > the copy machine. I like the way that you think! :)
Electronics Forum | Wed Nov 19 22:21:04 EST 2008 | davef
Here you go: * http://www.engineeringlab.com/soldermask1.html * http://www.circuitrework.com/guides/2-4-1.shtml ... or just go to Walgreens, buy some finger nail polish, and paint all the via with the polish.
Electronics Forum | Thu Nov 20 10:05:47 EST 2008 | cisridn
Thanks, I guess I was making this harder than what it is. I don't know why I did not checkout Circuit technology Center's website. I have been there before.
Electronics Forum | Wed Dec 10 21:40:06 EST 2008 | davef
So, this fine designer thinks the cost of you putzing around with is thing is cheaper to the comapny? No. The fine designer is measured on in-bound cost, but not on the impact on overhead of those in-bound costs. OK, try this one: Have your fabric
Electronics Forum | Sat Nov 15 08:15:48 EST 2008 | davef
So next time that you order boards from your fabricator, consider asking the your fab to cap these pesky via on the solder side with SR1000 [or whatever they think will be good and cheap]. Think of the money you'll save. Your boss will be ecstatic!!!
Electronics Forum | Mon Nov 17 21:04:09 EST 2008 | davef
Continuing with the idea of capping the via with SR1000: If you have boards in-stock that will require all the putzing around that you've doing to prevent the solder flowing through the via, consider reworking your stock with SR1000 to prevent all th
Electronics Forum | Wed Dec 10 16:00:07 EST 2008 | cisridn
Just to update. I tried using the temporary solder mask again and it worked great. I guess the first time I did not let the mask to cure long enough. Also, I inquired about have the via's plugged with SR1000 in the future and I was told by our PCB
Electronics Forum | Thu Nov 13 09:27:21 EST 2008 | cisridn
I have tried covering the vias with thermal tape and that did not work. I like the idea of plugging the via with a temporary solder mask. I will try that the next time I build a fixture which should be tomorrow. This is mainly a problem only becau
winsouce.jpg)
