Electronics Forum | Fri Jun 10 08:08:54 EDT 2005 | ajaydoshi
thanks a lot for info. If you have some photo, pl. send at ajay_doshi@utlindia.com Photo will help to understand better ajay
Electronics Forum | Fri Jun 10 09:41:05 EDT 2005 | PWH
Durostone CAG762 is the optically sensitive version of ESD safe durostone. This link shows some good examples of durostone SMT pallets. If you do not have a machine shop, you will have to contract this one out I would say. http://www.permali.com
Electronics Forum | Thu Mar 02 13:19:10 EST 2006 | Wave Master Larry
WELL, I heer that thikness was always wrong where I work, and for what ever reason the engineering department chose 6 milimeters. Personaly i would of gone 8 myself. I look under the magfying glass and always noticed in-suficient solder on the gull
Electronics Forum | Thu Mar 02 20:58:16 EST 2006 | pr
Dis agree?!?!?! We solder plenty of them o6o3s at honda and they l00k 0k! Solder balls will always fall off the b0ard when mounted anyway.
Electronics Forum | Mon Mar 13 04:18:42 EST 2006 | pedestrian
0.2mm gap between parts is small and easy to solder short. I prefer 5mils or 4mils.
Electronics Forum | Mon Sep 28 15:43:55 EDT 2009 | davef
Search the fine SMTnet Archives to find threads like: http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=39954
Electronics Forum | Sun Sep 27 22:39:55 EDT 2009 | rajeshwara
The same issue i faced 2 yrs before , i sugest 1. Use stencil of 4 mils ( Take care of Aspect Ratio and Area Ratio ). 2. Use Solder Paste of Type 4.5 and Viscosity in between 1100 to 1300. ( Try Solder Paste of Cookson or Alpha metals : OM338 T45-L
Electronics Forum | Mon Jan 23 22:53:31 EST 2012 | davef
= 0.66 aperture opening to the stencil wall has been shown to provide the best transfer efficiency and repeatability of the deposited paste. Values from 0.66 to 0.8 insure a good paste release from the stencil. The biggest impact on area ratio is the
Electronics Forum | Fri Sep 25 16:47:57 EDT 2009 | esoderberg
0.5mm pitch QFP's are typically mixed with large components on all of my boards. I usually use a 6 mil stencil with a minimum aperture width of 10 mils. Normal aperture size is 10 x 50 which causes shorts about 20% of the time. A recent purchase of
Electronics Forum | Thu Mar 02 13:04:22 EST 2006 | Chunks
0603 parts at .2mm spacing is pretty easy. But are there any other parts, like fine pitch QFPs? Is your board HASL or something else? Is there resist/mask between all pads? If it's just 0603's at .2mm, then you can probably go 7 mils and get good
