https://www.PCBLibraries.com/forum/ Wed, 15 Apr 2026 05:29:14 +0000 Tue, 20 Aug 2013 08:33:08 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=1082 https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ https://www.PCBLibraries.com/forum/flex-circuit-footprint_topic1082_post4203.html#4203 Author: Tom H
Subject: 1082
Posted: 20 Aug 2013 at 8:33am

I would recommend using the Most environment for the pad size and the Nominal environment for the solder mask size. This is a "Solder Mask" defined pad so that the solder mask helps to hold the pad to the flex board.

The solder mask only has to encroach on the Toe & Heel and not on the sides.

If you normally use the Least environment then make the pad size Nominal and the solder mask Least.
]]> Tue, 20 Aug 2013 08:33:08 +0000 https://www.PCBLibraries.com/forum/flex-circuit-footprint_topic1082_post4203.html#4203 https://www.PCBLibraries.com/forum/flex-circuit-footprint_topic1082_post4202.html#4202 Author: chads108
Subject: 1082
Posted: 20 Aug 2013 at 8:08am

I have a LCD that is to be connected to the PCB via a flex circuit soldered directly to the board.  The exposed pads on the flex circuit are 1.6mm x 0.6mm on 1mm pitch.  Is there some rule of thumb to use in determining the pad size to be used on the board to attach the flex circuit?
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