PCB Libraries Forum : Intended Stencil Thickness per IPC Standards https://www.PCBLibraries.com/forum/ Fri, 10 Apr 2026 04:43:08 +0000 Thu, 20 Feb 2025 16:50:04 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=3472 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[Intended Stencil Thickness per IPC Standards : 0.125 mm is a standard paste mask...]]> https://www.PCBLibraries.com/forum/intended-stencil-thickness-per-ipc-standards_topic3472_post13802.html#13802 Author: Tom H
Subject: 3472
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.




 
]]> Thu, 20 Feb 2025 16:50:04 +0000 https://www.PCBLibraries.com/forum/intended-stencil-thickness-per-ipc-standards_topic3472_post13802.html#13802 <![CDATA[Intended Stencil Thickness per IPC Standards : Using the IPC standards used by...]]> https://www.PCBLibraries.com/forum/intended-stencil-thickness-per-ipc-standards_topic3472_post13801.html#13801 Author: rweber
Subject: 3472
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.

]]> Thu, 20 Feb 2025 11:28:37 +0000 https://www.PCBLibraries.com/forum/intended-stencil-thickness-per-ipc-standards_topic3472_post13801.html#13801