Electronics Forum | Tue Oct 24 15:05:31 EDT 2000 | Steve Thomas
Maybe someone has a good explanation for this, but I'm wondering why your customer would dictate the equipment you use in your process. I thought typically contracts define the quality standards and you decide how to get there....show's you what I k
Electronics Forum | Fri Oct 27 11:34:30 EDT 2000 | Steve A
Wister, I agree with the other comments as far as challenging the customer, and minding proper height/width or better yet area aspect ratios. Let's assume you need to go with a .012" stencil for arguments sake. Talk to your stencil supplier about h
Electronics Forum | Sun Oct 08 00:18:05 EDT 2000 | Arturo
We are working with a 16mil TSOP Land width=0.2mm(8mil) and use: 1.Type 4 particle size solder paste. 2.Laser cut electropolished stencil: Aperture width=0.19mm (we tried lower than this but had solder insufficiency). Thickness=0.005"(130 microns)
Electronics Forum | Mon Jul 30 21:12:32 EDT 2001 | davef
"Poor release" (paste hanging-up in the stencil holes) could have three main (or combination of) causes: 1 Equipment: Stencil is too thick. Specifically, a 6 thou stencil should be OK, providing you don�t violate the area and aspect ratios in the fi
Electronics Forum | Thu Sep 30 06:47:51 EDT 1999 | park kyung sam
| My stencil thickness is 6 mil and we got qfp's with fine pitch. | how many percent should i reduce my stencil aperture using a 6 mil stencil for 0.5 mm pitch and 0.4 mm pitch ? | | thanks | we have placed 16 mil components for 3 years. why don't
Electronics Forum | Wed Feb 18 14:45:33 EST 2004 | Mauro Pinheiro
I'm looking for a shareware software that I could use for specifying stencils (we are stencil users not manufacturers). I would like to enter some preliminary spec in a software form, such as: the smallest pad geometry on pcb (possibly selected from
Electronics Forum | Fri Jun 11 03:50:39 EDT 2004 | Scott B
We currently have an issue with via's in pads which we have been living with for some time. The problem has now escalated with the need to increase the via hole size to achieve PCB fabricators aspect ratio's. We are now not only experiencing solder d
Electronics Forum | Mon Jul 31 12:59:19 EDT 2006 | slthomas
Nothing like making a handful of changes all at once to confuse an issue, huh? Did you (or whomever ordered the stencil) spec. the same stencil design parameters that you would normally have used? We've never done fine pitch of any sort on silver
Electronics Forum | Thu Aug 31 10:57:24 EDT 2006 | slthomas
Is it possible that he was testing you to see if you knew whether or not 610 addressed environmental specs? I had a consultant that was touring our plant ask me what aspect ratio we used on our stencils. I told him I like to keep it at 1.5 if I can.
Electronics Forum | Mon Dec 17 12:11:29 EST 2007 | chef
Whoa dude - slow down- maybe great beer money but if you don't have good environmental and ESD controls in your shed, all your suds slush fund will evaporate in RMA's costs. A small pick and place (table top) would do. A manual screen printer would h
