PCB Libraries Forum : Rounded Rectangle pads https://www.PCBLibraries.com/forum/ Sun, 05 Apr 2026 21:07:23 +0000 Tue, 30 Oct 2012 10:51:19 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=645 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[Rounded Rectangle pads : There is no recommendation...]]> https://www.PCBLibraries.com/forum/rounded-rectangle-pads_topic645_post2220.html#2220 Author: Tom H
Subject: 645
Posted: 30 Oct 2012 at 10:51am

There is no recommendation on the minimum radius because the 20% of the pad width has been tested for the finest 0.4mm pitch component for SOP/QFP. The minimum pad to pad spacing is 0.15 mm (6 mils). Therefore the minimum pad width = 0.25 mm (10 mils) and the corner radius on that pad = 0.05 mm (2 mils).
 
So 0.05 mm (2 mils) is the minimum radius.
 
]]> Tue, 30 Oct 2012 10:51:19 +0000 https://www.PCBLibraries.com/forum/rounded-rectangle-pads_topic645_post2220.html#2220 <![CDATA[Rounded Rectangle pads : I see in the PCB Design Optimization...]]> https://www.PCBLibraries.com/forum/rounded-rectangle-pads_topic645_post2216.html#2216 Author: chads108
Subject: 645
Posted: 30 Oct 2012 at 9:42am

I see in the PCB Design Optimization presentation that recommended maximum radius for rounded rectangle pads is 0.25mm with a 0.01 round-off.  Is there a recommended minimum radius before it gets so small that it wouldn't be of any advantage?]]> Tue, 30 Oct 2012 09:42:41 +0000 https://www.PCBLibraries.com/forum/rounded-rectangle-pads_topic645_post2216.html#2216