Electronics Forum | Wed Nov 01 12:19:42 EST 2000 | Fraser
Steve, someone somewhere is feeding you a line!! if you increase the draft angle from || to / \ on your laser cut stencil you increase the surface area of the side wall and hence increase the likelyhood of the paste sticking in the aperture. Whats m
Electronics Forum | Thu Dec 16 15:00:20 EST 2004 | glaucon
Simple differences. Both processes require a very similar machine platform, controlled motion, vision fiducial recognition and alignment of a substrate (PCB or hybrid ceramic) to the "image", the image being either a stencil (hence stencil printing)
Electronics Forum | Sun Dec 08 23:40:19 EST 2002 | nonotalent
Hi all, We are currently having problems with > a laser-cut stencil that is electropolished and > nickel plated with 9-mil openings. The paste > does not release well from the apertures. We are > having to wipe after every print. The board is >
Electronics Forum | Wed Nov 20 16:36:41 EST 2002 | davef
Electroformed stencils cost about twice as much as other stencils, but they to have better paste release characteristics than laser cut stencils.
Electronics Forum | Sun Oct 09 01:11:34 EDT 2005 | vev
There is a stencil cutting machine in the industry which utilizes a water jet to deliver a Laser beam for cutting stencils. There are no machines of this type in the states. The quality is no better than a Laser cut stencil using a good Laser System.
Electronics Forum | Thu Apr 01 15:10:33 EST 1999 | Brian
B: Are you electropolishing your apertures? With a finish of this type you can come close to Laser cut's smoothness. | We make an excellent chem-etch stencil. Our customers have had success printing 16 mil pitch without a problem. This is not an ad
Electronics Forum | Thu Apr 01 16:47:23 EST 1999 | AlexO
Dan, The rationale to use laser cut stencils in my experience is based on the benefits to paste release. Laser cut stencils are "supposed" to have a smoother inner aperture wall. That, combined with the trapezoidal shape (which can be emulated with
Electronics Forum | Wed Jul 15 12:22:57 EDT 1998 | Steve Moore
Electropolishing definitely improves the print characteristics of both Laser-cut and Chem-etch stencils. The caveat here is avoid over polishing which results in rounding of the edges and/or enlargement of the openings. Over polishing is typically th
Electronics Forum | Thu Mar 25 15:10:45 EST 1999 | Dan Hughes
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 for the
Electronics Forum | Fri Jul 10 14:23:40 EDT 1998 | Wayne Bracy
Todd: You might want to speak with IRI Stencils about laser cut stencils and platting. Wayne
