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 | Wed Jan 08 08:20:52 EST 2014 | emeto
To most of our boards I give 20-30% tolerance in both directions. From experience if you have big aperture on your stencil, the squeegee will scoop certain amount of paste from this aperture and you will see lower height. Depending on your board supp
Electronics Forum | Tue Jul 13 14:48:49 EDT 2004 | Mark
I was wondering some input on what to use for measuring height on our solder paste for SMT placement. Is there a place to buy a machine or a scale in which you can use? I know in the past I have used a laser scope at another facility but where I am n
Electronics Forum | Tue Aug 04 03:54:04 EDT 2009 | rafacadiz
I would like to perform a Solder paste height capability study. I will apreciate any info about and what equipment use to measure the height of the solder paste. I only found the attached equipment. Solder Paste Height Measurement System (SPM-300-3D
Electronics Forum | Wed Mar 30 08:06:17 EST 2005 | davef
Considerations are: * If the nonwetting is component lot specific, the could be solderability issues with that lot. * If the nonwetting is is a broader based component issue, the solderability protection on the component may require a different reflo
Electronics Forum | Wed Mar 30 01:01:10 EST 2005 | vicknesh28
All, Has there been any finding from the component point of view in terms of non wets after reflow and if yes, can anyone share what was improved on the component to reduce the non wet defective levels. What would be the contribution from the compon
Electronics Forum | Mon Feb 21 03:51:37 EST 2005 | abhirami
Solder paste thickness control is more important in SMT process. What controls do you have? I guess if everyone follows the critical control path, then there are always reduced problems. The issue is no one is perfect. Paste tends to be on the stenci
Electronics Forum | Fri Mar 06 12:38:34 EST 2009 | mgershenson
Is this a manual measurement machine? As already stated, knowing the height of the pad underneath the paste brick is critical to knowing the true height an/or volume of paste. Any decent automated inspection system will have a way to factor out the p
Electronics Forum | Tue Feb 22 07:58:16 EST 2005 | davef
We hear you. If it's not broken, why fix it? Right? Well intentioned, but not very educated customers seems to be part of the bane of existance of process engineers at contractors. First, as a previous poster said, paste height is an improper mea
Electronics Forum | Tue Jul 13 16:19:05 EDT 2004 | Inspection Solution
Hi Mark, There are many tools available for measuring solder paste height. Most machines use laser as the basis for inspection while others use structured white light. If simple height and width inspection is all that is required, you can look int
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