PCB Libraries Forum Homepage
Forum Home Forum Home > Libraries > Footprints / Land Patterns > Allegro
  New Posts New Posts RSS Feed - Rounded Rectangle pads
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Rounded Rectangle pads

 Post Reply Post Reply
Author
Message
chads108 View Drop Down
Active User
Active User
Avatar

Joined: 17 Oct 2012
Location: Plano, TX
Status: Offline
Points: 35
Post Options Post Options   Thanks (0) Thanks(0)   Quote chads108 Quote  Post ReplyReply Direct Link To This Post Topic: Rounded Rectangle pads
    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?
Back to Top
Back to Top
Tom H View Drop Down
Admin Group
Admin Group
Avatar

Joined: 05 Jan 2012
Location: San Diego, CA
Status: Offline
Points: 5716
Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post 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.
 
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.141 seconds.