Electronics Forum | Fri Oct 10 19:24:53 EDT 2003 | MA/NY DDave
Hi SMTAnet, SMTnet, You already got good answers for how to go forward. I believe that this 50mils is a remnant of the days when we started at 125 mil grids and started the process of going down to 100mil grids, SMT. My gosh who would ever want a 1
Electronics Forum | Wed Aug 31 11:02:28 EDT 2005 | Jason Fullerton
We are using one BGA that has 7 mil bumps on a 20 mil pitch. We use the manufacturer's recommended pad and aperature layout, which is an 11.8 mil square overprint on a 6 mil land. At 11.8 square, you need to use a 4 mil laser cut or a 5 mil e-form st
Electronics Forum | Fri Jul 07 12:44:49 EDT 2017 | tsauve
The problem is registration between the stencil & the smallest pads on the 5 substrates. Using SPI s/w I can overlay the paste layer over the PCB image to determine stretch/shrink. Our worst case was shrinkage of 10.2mil on a 5-up 300mm panel - small
Electronics Forum | Thu Oct 07 09:38:22 EDT 1999 | Dave F
| Is anyone aware of a web page for military spec's? I am looking for Mil-P-28809. | | Thanks, | Mike Demos | Mike: My usual source, DSCC Columbus, gave this response to a search on "Mil-P-28809" Search Mil Specs & Drawings No basic specs, St
Electronics Forum | Tue Jul 07 12:52:02 EDT 1998 | Upinder Singh
Thanks Earl. Well following is the data regarding the product. 1. The panel consists of 21 boards. 2. The surface I mentioned would have 3 SMds and 1 T/hole connector. 3. PCB thickness is 55 mils and the width of the hole on the PCB for the thru-
Electronics Forum | Tue May 06 06:31:21 EDT 2003 | yukim
The stencil thickness was about 7 mils and was changed to 6 mils.
Electronics Forum | Thu Jun 26 21:38:31 EDT 2003 | Dreamsniper
Hi Guys, Need your good advice about this for a 5 thou stencil thickness: 0603 pad is 50mil x 40mil 0805 pad is 75mil x 45mil 1206 pad is 70mil x 50mil I want the above apertures to be in IPC STD Homeplate Design + an area reduction of 15%. Will t
Electronics Forum | Tue Feb 21 21:17:41 EST 2006 | Cal Kolokoy
M, The paste height is what you establish it as. You're probably using a laser measurement system, and these depend on where your reference datum is. Some will measure from a silkscreen, a trace, or solder mask. These add height, not to mention H
Electronics Forum | Tue Apr 04 11:51:44 EDT 2006 | dougs
10mil square apertures should be ok with your 4mil stencil.
Electronics Forum | Mon May 10 11:38:22 EDT 2010 | smt_guy
This is not for a BGA.
