Electronics Forum | Tue May 22 11:38:04 EDT 2012 | naynayno
I am looking for IPC or other published standards that specify cleanliness levels for: 1) solder paste stencils 2) selective solder pallets When we cleaned PCB's we used a limit of 4 M-ohms. Now that we have transitioned to No-Clean, I am wonderi
Electronics Forum | Mon Jul 02 16:05:54 EDT 2012 | stentech
using fids instead of pads I agree would be more accurate. However if the board and stencil do not register then nothing will align. We have started to fo many stencil to board matching due to board distortion either before or during production. We a
Electronics Forum | Mon Jul 02 16:19:02 EDT 2012 | jorge_quijano
Thanks for you inputs guys. We left our customer know about the design issues, they will add fids on the next version, I hope it helps. meanwhile we'll deal with those issues. I tested a new stencil today and It has a better alignment than the older
Electronics Forum | Thu Jul 05 15:52:02 EDT 2012 | stentech
What size frame are you using and what thickness and size is your stencil. I would ask your stencil vendor for their positional accuracy over 20-36 inches x-y. We have the capability also to make a photoplot in a controlled environment and over lay i
Electronics Forum | Thu Nov 15 03:07:35 EST 2012 | nikyta
Thanks for your reply. As already said by Anvil1021, is not a good idea to mix Lead and Bismuth! Stay away from Bismuth if you have even the slightest traces of Lead on yours PCB, stencil, squeegee, spatula, blade, cleaning paper or cleaning cloths,
Electronics Forum | Wed Nov 14 09:19:45 EST 2012 | davef
Sent: Wed, 14 Nov 2012 08:23:03 -0500 Subject: RE: SMTnet Forum: Question About Blackstone Stencil Cleaner, CH-2408 Dave, This E mail is to confirm that the Stencil Cleaner Model CH-2408, manufactured by Blackstone-NEY Ultrasonics, does not require
Electronics Forum | Mon Dec 03 09:53:40 EST 2012 | anvil1021
Well there are 2 ways to go about this, the first would be to have your stencil provider do the calculations for you (with his software) or you can purchase LPKF CIRCUITCAM EDIT from LPKF. This is a Gerber editing software that is designed to make st
Electronics Forum | Fri Mar 15 18:44:34 EDT 2013 | anvil1021
We will try both the solder mask and the .001" Kapton and see where we end up with each. This is a fine pitch dual row QFN and we cannot afford too much paste on the .004" stencil we are using. We have experienced shorting in the past with .005" sten
Electronics Forum | Fri Oct 18 08:54:18 EDT 2013 | emeto
Hege, the Nano coating goes on the opposite of the squeegee side of the stencil. I don't know if the cleaning paper is able to remove it little by little with the time, but I never refreshed my stencils with Nano coating and they work just fine. How
Electronics Forum | Fri Mar 07 15:57:32 EST 2014 | jdengler
We have used the Stencilquik™ BGA Stencils from the same supplier to attach some LGA's for a prototype run. We were able to get a few different thicknesses to see which worked best. They worked very well for that limited application. We did not tr
