Electronics Forum | Thu Jun 15 07:20:23 EDT 2006 | William G.
How are your experiences with stencilling 0201 components on large circuit boards, i.e. 400 * 250 mm ? Will there not be too much mismatch between between stencil and (FR4) boards? If so, would dispensing be a solution? Any other solutions?
Electronics Forum | Thu Jun 15 07:39:04 EDT 2006 | Chunks
Dependig on your process. If you use the same Gerber data that made the board to make your stencil, by a reutable stencil manufacturer, then no you should not have any mismatch issues.
Electronics Forum | Tue Jun 15 17:29:25 EDT 2004 | gregp
Just an idea... Try investigating methods for storing large drawings. We have a hanging file cabinet for E size drawings. You apply a self adhesive strip of mylar to the end of the drawing that has four holes in it. The cabinet opens up and 2 sets
Electronics Forum | Fri Feb 15 08:13:18 EST 2002 | Dave G
What Snap-Off are you running ? I've seen this happen when a large negative Snap-Off is used. If you "contact" print (I.E. Zero Snap-Off) this tends to minimize the stencil coining. We use a mix of MPM & Transition Automation blades. I have noticed
Electronics Forum | Thu Oct 21 14:02:32 EDT 1999 | Ron Costa
We are a contract manufacturer currently building a job with IBM CBGA-255 devices and 20mil QFP's that are close to each other. We use a 6 mil laser cut and electro polished stencil with one to one apertures on the BGA's. The customer is experiencing
Electronics Forum | Tue May 26 05:30:25 EDT 2009 | grantp
Hi, I don't think DEK do anything, but does anyone know of anyone who does any full automatic stencil printers? Grant
Electronics Forum | Fri Sep 17 09:31:17 EDT 2004 | russ
Step stencils are used but only when necessary. One reason to use one would be a PCB with 12 mil pitch and very large coils or something of that nature. The 12 mil pitch part would require a 4 mil thick stencil to ensure release while it would caus
Electronics Forum | Tue May 26 07:57:16 EDT 2009 | stevezeva
Grant, Look at Surface Mount Techniques: http://www.smtprinters.com/printers.html They make fully automatic printers that will print PCB's up to 30" X 60" and 1" thick. That's pretty large format if you ask me... Steve
Electronics Forum | Mon May 04 22:02:58 EDT 2009 | grantp
Hi, Does anyone know a possible supplier for very large electroform stencils? Regards, Grant
Electronics Forum | Fri Sep 19 11:58:49 EDT 2008 | davef
Four Points supplies materials to stencil fabricators. Four Points, SMT Stencil Supply: Standard Frame Sizes 8" x 10" I.D. Cast Aluminum 12" x 12" I.D. Cast Aluminum 15" x 15" I.D. Cast Aluminum 12" x 17" I.D. Cast Aluminum 15" x 15" I.D. Cast Alu
