Electronics Forum | Sun Oct 05 15:54:51 EDT 2008 | hasu
Hi All! I remember reading and seeing some (maybe Loctite) product which could be used to fill stencil apertures, but now when I need one, I cannot find it. Or anything like. Can some one please guide me? And with filling I mean permanent filling, n
Electronics Forum | Tue Oct 07 11:39:04 EDT 2008 | sliebl
We use high temp (K&pton) tape on the bottom side of the stencil. This works well for us as an interim fix prior to replacing the stencil. I'd be interested to know if there are permanent methods of filling the apertures that can be done in-house.
Electronics Forum | Thu Oct 09 15:26:08 EDT 2008 | wrongway
We use campton tape also but we use a ultasonic stencil cleaner and the tape will come off everytime its washed good luck
Electronics Forum | Wed Oct 08 14:33:30 EDT 2008 | sambolian
Steve hit it on the nose, use high temp kpton tape....we do the same thing. Cheaper.
Electronics Forum | Thu Oct 09 07:35:04 EDT 2008 | smtnet51
Yep, they are cut all the way through and you are correct, they do not stay in there very long. Then when they pop out you wind up pasting the fids on your pcb, not ideal!
Electronics Forum | Wed Oct 08 10:54:35 EDT 2008 | stepheniii
Check with your stencil house. At one time I used a Panasonic screen printer with the fiducial camera looking at the top of the stencil. The stencils are cut from the bottom so the fiducials had to be cut all the way through. And the stenicl house wo
Electronics Forum | Wed Oct 08 14:47:45 EDT 2008 | slthomas
We used to have fids filled with epoxy too, but they were never cut all the way through. It was just to blacken the mark better. Are you sure they were actually cut through? I can't imagine something as brittle as epoxy holding as a filler with not
Electronics Forum | Tue Oct 14 10:33:27 EDT 2008 | martinouk
We use masking tape - cheap as chips although you do have to replace it after washing. I have in the past used BLACK TAK from loctite. It was extremely expensive, and was supposed to be permenant. But after two/three washers through the cleaner it ne
Electronics Forum | Thu Aug 30 13:06:10 EDT 2018 | emeto
I don't know your board, but for this specific part: 10mil round aperture on a 3.5mil stencil with type 4 paste wold be ideal
Electronics Forum | Wed Oct 11 13:26:59 EDT 2023 | cyber_wolf
Its highly doubtful that stencil design will fix this. The Inductor floats during reflow and ends up going where it wants to go. The only way you are going to keep it in place is to put a dot of chipbonder beneath it or change the size of the lands
