Intended Stencil Thickness per IPC Standards

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   Using the IPC standards used by Footprint Expert, is there an intended stencil thickness being considered?

Stencil thickness is relevant since it is a factor in the volume of paste deposited, and the aperture area ratio/aspect ratio affecting paste release.

For example, I often see example stencil designs on Texas Instruments datasheets that are given for a 0.125mm stencil thickness.

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rweber Members Profile Send Private Message Find Members Posts Add to Buddy List New User Joined: 19 Feb 2025 Status: Offline Points: 2	Post Options Post Reply Quote rweber Report Post Thanks(0) Quote Reply Topic: Intended Stencil Thickness per IPC Standards Posted: 20 Feb 2025 at 11:28am
	Using the IPC standards used by Footprint Expert, is there an intended stencil thickness being considered? Stencil thickness is relevant since it is a factor in the volume of paste deposited, and the aperture area ratio/aspect ratio affecting paste release. For example, I often see example stencil designs on Texas Instruments datasheets that are given for a 0.125mm stencil thickness.



Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5761	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply Posted: 20 Feb 2025 at 4:50pm
	0.125 mm is a standard paste mask stencil thickness. But microminiature footprints might have the stencil thinned to 0.10 mm. IPC-7525C Stencil Design Guidelines is the leading document. Rounded Rectangle apertures help stencil release for lead-free solder alloys.
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