Electronics Forum | Fri Aug 21 15:03:42 EDT 1998 | Dave F
| How is the aspect ratio of a reliable BGA joint defined? Is it best to have H/W between two limits? What are these? Steve: People on TechNet have spent alot of time talking about BGA pad design. Use the link below. Dave
Electronics Forum | Fri Apr 05 11:18:20 EST 2002 | habs24
Anyone have experience using Dupont CB100 for high aspect ratio via fills? Or even where I could get more information on the processes involved? Thanks in advance...
Electronics Forum | Mon Oct 27 14:06:10 EST 2003 | russ
Search the archives, plug in 0402 OR aspect ratio and you will find everything you need to know about area and aspect ratio. These are the critical formulas for paste release. Russ
Electronics Forum | Tue Jun 17 08:52:39 EDT 2003 | russ
Aspect ratio = width of aperture divided by height. E.G. 6 mil stencil at 9 mil wide = aspect ratio of 1.5. Value should be 1.5 min. Area ratio - use when length and width of pad are roughly same dimension like for BGAs and 0805 and smaller R-nets
Electronics Forum | Tue May 30 07:41:21 EDT 2006 | davef
Aspect ratio: The ratio of a via�s length or depth to its pre-plated diameter. So, in your case, either * 6=0.093/x, calculating x=0.093/6=0.016 as the smallest via hole diameter. ... OR * 6=y/0.01, calculating y=6*0.01=0.06 as the maximum board th
Electronics Forum | Fri Jun 03 17:24:35 EDT 2005 | davef
Search the fine SMTnet Archives for "aspect ratio" and for "area ratio".
Electronics Forum | Sun May 28 08:24:50 EDT 2006 | Sjm
I read about 10:1 , 6:1 aspect ratio but I don't understand how it works. Can someone explain how you figure out the aspect ratio on a design with a board thickness of .093 and via hole size of .010 I don't know how to get the 6:1 number Is it the b
Electronics Forum | Fri Jul 11 15:23:25 EDT 2003 | John
do you mind sending me the excel file also? 4699j@hotpop.com
Electronics Forum | Wed Jul 16 21:08:25 EDT 2003 | hamos_wks
pls send me a copy too. thks! kietsiongwong@pg.slr.com
Electronics Forum | Fri Jul 17 09:28:27 EDT 2015 | davef
8 Best davef
.jpg)
