Electronics Forum: height tolerance capacitor (Page 1 of 15)

Fillet height of SMT chip capacitor

Electronics Forum | Tue Jan 29 08:21:50 EST 2019 | electronics101

Hi All, Can someone please help, I have a number of tall surface mount components that according to IPC 610 (8.2.2.3) are a fail due to the end termination not wetting at least 0.5mm + solder height. The components are very well soldered but the sol

Fillet height of SMT chip capacitor

Electronics Forum | Tue Jan 29 17:11:32 EST 2019 | slthomas

Your product is Class 3, correct? Otherwise, a clearly wetted connection is all you need.

Fillet height of SMT chip capacitor

Electronics Forum | Wed Jan 30 03:01:39 EST 2019 | robl

You could use a stepped stencil around the parts you're having issues with to add a greater paste deposit to them and not the rest, or slightly elongate the apertures and overprint, but this may lead to solder balling.

Fillet height of SMT chip capacitor

Electronics Forum | Wed Jan 30 13:17:22 EST 2019 | slthomas

In addition to robl's suggestions, I would look at the footprint on the board to make sure it meets the recommended dimensions. Abnormal layouts, particularly when pads extend under the component too far, can be problematic both by lifting the part

Fillet height of SMT chip capacitor

Electronics Forum | Wed Jan 30 02:50:33 EST 2019 | electronics101

Hi Steve Thanks for coming back to me, you are correct IPC class 3 is required. We are getting great wetting onto the device but not as per IPC 3 with the wetting rising about 0.25mm. I am questioning whether it is actually possible with such a (re

How to define solder paste printing height tolerance

Electronics Forum | Mon May 07 10:42:09 EDT 2012 | saju86ece

Hi, I need one clarification about solder paste printing height tolerance. How to define and fix the solder paste height tolerance after screen printing for inspection purpose. Currently we are using 5mils thickness of stencil, in that we are gave

How to define solder paste printing height tolerance

Electronics Forum | Mon May 07 16:07:05 EDT 2012 | davef

Start with targets based on the stencil thickness (for height) and stencil thickness times the aperture size (for volume). * Set reasonable upper and lower control limits (+ 25% and –25 % of the targets, for example). * Next, check the printer set-u

Paste printing, acceptable tolerance ?

Electronics Forum | Wed Jun 07 22:33:50 EDT 2006 | Bolos

first: what is your problem after reflow? second: a good rule of thumb is a tolerance of 1 mil. for example..if you got 5 thou stencil thickness then your range of thickness is 6-/+1 thou.. then you just improve after you get your height data and ana

solder paste height standard

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

solder paste height standard

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

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