Electronics Forum | Thu Apr 01 22:21:45 EST 1999 | Dave F
| We make an excellent chem-etch stencil. Our customers have had success printing 16 mil pitch without a problem. This is not an advertisement! | | When we try to sell our product to new customers, we find more and more people willing to pay more fo
Electronics Forum | Sun Sep 02 19:06:03 EDT 2007 | gioblast
that I Can still use my old laser cut stencil that I used in leaded process? and also my wave pallet that I have used in leaded process? Your comment is highly appreciated for all lead-free transition recommendation and control.cheers n rgds
Electronics Forum | Tue Mar 23 09:55:33 EST 1999 | Dan Hughes
| Al, | | In general, I would agree with Justin and Scott, with the exception that I don't feel a laser cut stencil is required when printing 25 and 20 or even 16 mil pitch. We make a good chem etch stencil that will print fine pitch great if you ev
Electronics Forum | Tue Feb 25 11:56:33 EST 2020 | slthomas
I think I'd opt for a stencil with everything already cut and then tape it if that didn't screw up your stencil gasketing. Then you just have to define the process for adding the optional parts and you can decide to use those apertures or not.
Electronics Forum | Wed Feb 26 13:26:24 EST 2020 | rgduval
I'd agree with getting a stencil fully cut, and taping the pads you don't want paste on. But, I'd also check with the people that will be doing the hand soldering to see what they prefer. Some people prefer soldering on bare pads, some prefer solde
Electronics Forum | Tue Oct 24 17:01:15 EDT 2006 | grizzy
Well super, super, sorry I had cap locks on - no yelling intended. Let's keep this a technical forum. Many manufacturers charge to register their equipment prior to selling parts or providing service. Agree or dis-agree with this practice it is a re
Electronics Forum | Mon Aug 12 12:16:25 EDT 2019 | SMTA-Martial
Hi, We are using a 15mils to 5 mils step stencil with a metal blade. The 15mils area the surface is smooth and polish and in the 5mils area the surface is rough and porous because of the laser process. In the 5 mils area where there is no aperture t
Electronics Forum | Mon Jun 07 07:18:23 EDT 1999 | tannlin
| Hi everybody, | | Somebody know the advantages of electroformed stencils on laser cut stencils ? | | any coment is apreciated. | | | thanks | | Al Al As far as I am aware most of the big OEM's and CEM's have tried and rejected frameless sten
Electronics Forum | Sat Jun 23 11:41:34 EDT 2007 | grantp
Hi, We use 1:1 for 1 mm BGA and it works fine. We used it at 4 thou laser cut stencils when we had a manual stencil printer, but have moved to 5 thou with the DEK and it works ok. We originally went to 4 thou because of paste release, but the DEK
Electronics Forum | Mon Mar 27 08:28:48 EST 2000 | Mark Alder
Dear Robert The reason for the bridging problem you are experiencing on your BGA's is due because of too much solder. The PCB pads need to be at least 15% larger than the sphere size of the BGA balls. If you are not using C4 (63/37) BGA spheres and