Electronics Forum | Thu Oct 30 09:15:20 EDT 2008 | kingshar
Hi, Hi, 1) Can anyone tell be what is the acceptable manufacturing tolerance from stencil to PCB . 2) what are the methods we can avoid that. 3) What is the method to avoid PCB shrinkage. 4) How can we correct shrinkage 5)Is there any standard gud
Electronics Forum | Fri Oct 31 08:02:14 EDT 2008 | davef
Here is some more reading on stencils for you: http://www.smtinfo.net/Db/_Stencil%20Printing.html
Electronics Forum | Fri Oct 31 07:15:39 EDT 2008 | kingshar
Hi Andrzej, Thank you for your suggestions. The Link which you referred is really informative. Thanks and Regards, Kingshar
Electronics Forum | Fri Oct 31 06:55:35 EDT 2008 | andrzej
Answer on point 2 - I understand you send him gerbers of single PCB (?). In most cases you have panelized PCBs so to avoid problems with stencil first you should order PCBs and ASK your PCB supplier to send you back his gerbers of panel. There are so
Electronics Forum | Thu Sep 16 20:33:07 EDT 2021 | astarotf
Hello there I would like to know what is the best way to work a stencil template, if to send it to be manufactured with an electropolishing or nanoslic finish. I would like to know differences one from the other and which is the best, I am attentive
Electronics Forum | Mon Sep 20 18:08:49 EDT 2021 | emeto
Nowadays I cut everything with nano-coat. it does improve release and adds 25% to the stencil price. Adds a little more time to cure the coat.
Electronics Forum | Thu Sep 23 01:54:54 EDT 2021 | auriga2001
We use nanocoating also on the stencils we purchase for our facility. It's easier to clean, there is less wear on the surface, and the solder paste releases better from smaller apertures.
Electronics Forum | Mon Mar 02 10:23:46 EST 2009 | wrongway
You may need a glue despinser if you populate bottom side then wave. maybe a board deatacker at front of the line how about a multifunction pick and place machine so you can process all parts out there. we cleaned our stencils for years then we got a
Electronics Forum | Mon Mar 02 08:25:08 EST 2009 | jorge_quijano
Thanx for all your recomendations, we already ask for a 3D SPI and help us well, we are asking for a ultrasonic stencil cleaner. By the way how do you deal with the 'head in pillow' defects? is there a solder paste alloy / profile issue?
Electronics Forum | Mon Mar 02 00:38:35 EST 2009 | sachu_70
Hi Jorge, The success of such production purely depends on process control. One needs to first understand the board layout in detail, and evaluate any critical components for their temperature handling capabilities. Remember, you are dealing with com
