Electronics Forum | Mon Mar 02 11:27:51 EST 2009 | wrongway
Check stencil is their a lot of paste still on the stencil if so that is the extra thickness maybe add more pressure. check to see if board is coming up far enough to touch the bottom of the stencil.
Electronics Forum | Tue Feb 21 20:22:46 EST 2006 | mnguyen
Hi, I am having problem looking through IPC and finding according to ISO spec what should the paste height requirement vs stencil. EXAMPLE: The stencil is 5mils thick and according to the specs we have on paste height measurement the max height to be
Electronics Forum | Thu Mar 05 09:54:59 EST 2009 | davef
When you measure "solder paste heigth of 7 & 8 mils using a 5.0 mils stencil," are you measuring the top of a flat brick? Sometimes if you snap-off the stencil too fast, the paste touching the stencil walls form peaks along the edge of the brick that
Electronics Forum | Tue Feb 22 08:40:12 EST 2005 | JB
A couple of features on your stencil printer that should help with a couple of potential printing processes: A temperature control unit and the automatic understencil cleaning with the chemical of your choice. That alone, will reduce the chances of
Electronics Forum | Fri Feb 18 23:21:00 EST 2005 | JSS
Hi Everybody, Mostly customer asked about the solder paste height checking after printing process.Is it compulsory to check the height if we are using stainless steel stencil and metal blades in fully automatic printer.Any technical answer to their
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 | Fri Jan 24 08:14:24 EST 2014 | davem
m_imtiaz, Over the last 15 years or so I've found that using the stencil foil thickness +2mils/-0mils has worked very well. For example, if you have a 5mil stencil thickness your upper control limit would be 7mils and your lower control limit would
Electronics Forum | Tue Jan 07 23:38:08 EST 2014 | m_imtiaz
want to know the tolerance the paste height in the solder paste printing. for example if stencil thickness is 7 mil, what will the acceptance level of paste height ( upper and lower) kindly share if any guidelines or formula for the same
Electronics Forum | Thu Mar 17 09:34:10 EST 2005 | sumxp
What is the spec limit setting for solder paste height control in your area.Is it +/-2mils for 6 mils stencil? Tx
Electronics Forum | Thu Oct 27 07:57:35 EDT 2005 | Bob R.
Nearly all of our assemblies have to meet class 3 requirements and we regularly use 5 and 6 mil stencils. If you've got reasonably well controlled processes you won't have any trouble getting class 3 joints on QFPs and discretes.
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