Electronics Forum | Tue Mar 27 06:27:41 EDT 2018 | cyber_wolf
Occasionally when circuit boards are manufactured, there may be issues with solder mask coverage. It is not uncommon to re-run back through this process to fix missing or thin areas. This can causes the traces to become higher which in turn raises th
Electronics Forum | Fri Jun 12 05:56:53 EDT 2020 | sssamw
I cannot see the logic connection between HIP and RSS or RTS, or between HIP and solder paste volume because volume is ok. Did you measured the BGA solder profile?
Electronics Forum | Fri Nov 23 14:47:35 EST 2001 | kgroen
Some comments on the previous post: Be careful when looking at the proportion of SMT defects that are solder defects - you may very well find that only a small few of them originate at the screen printing step. As for specification limits for pas
Electronics Forum | Mon Dec 03 03:42:15 EST 2001 | ianchan
Hi, actually this point was raised a cuppa times, from the past discussion forums... thats why I posed this questions once again *yawn* to find out any new delvelopments in relation to paste Volume giving accuracy??? Obviously it doesn't seem to h
Electronics Forum | Sat Nov 21 12:28:00 EST 2009 | flipit
There is evidence of lead being used in soldering 5000 years ago in Mesopotamia. Not a big issue for most people doing SMT but the poster should also understand why percent metal is adjusted for different solder paste alloys. You print by volume b
Electronics Forum | Wed Nov 23 12:34:35 EST 2005 | PWH
Cartridges/dispenser systems supply even paste volume to the screen. This will help provide the most consistent squeegee roll as well as paste deposition on PCB. Messier, though = much printer maintenance. Some people also like to use a caulking g
Electronics Forum | Thu Mar 29 01:22:57 EST 2001 | chinaman
Hello everybody, Two questions came up during an audit (old topics once more): 1. we are not checking the solder paste volume/pad height after printing - others are using an AOI, but is it really necessary? We just do visual inspection randomly. We
Electronics Forum | Tue Apr 10 12:56:23 EDT 2001 | slthomas
Didn't you hear? Fendelaz went out of business and sold the rights to the Magnaplancil to Amahlmahay. Sure, all the standard variables still affect the print quality (aka registration and volume) but if the machine controls everything but paste di
Electronics Forum | Wed Dec 08 18:22:47 EST 2004 | msjohnston1
Here is a list of companies that have solder paste inspection equipment that use a laser for measurements www.gsilumonics.com www.orbotech.com/products_assembly_main.asp www.fa.panasonic.co.jp/products/smt/inspection/main/ipm_e.html
Electronics Forum | Wed Dec 12 21:43:16 EST 2007 | davef
There is no specification for solder paste height, just as there is no specification for paste volume. Focus on producing a fillet that meets J-STD-001. You make the choices that produce the end result.
