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Flex Circuit Footprint |
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chads108 
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Joined: 17 Oct 2012 Location: Plano, TX Status: Offline Points: 35 |
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 Topic: Flex Circuit FootprintPosted: 20 Aug 2013 at 8:08am |
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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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Tom H
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Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5719 |
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Posted: 20 Aug 2013 at 8:33am |
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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. |
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