Phoenix Display International, Inc

What is Chip-On-Flex (COF)? | Custom & Standard LCD Displays | Phoenix Display International, Inc

What is Chip-On-Flex (COF)?

Chip-On-Flex is where the LCD driver is mounted directly to a flexible circuited board. These
IC-Flex combinations would come from the driver manufacturer on a reel form referred to as
TAB, or tape automated bonding. In the past, this was a very useful configuration of LCD driver
ICs, as they take up much less space on the LCD glass ledge. However, they are much less
common today due to the additional cost of the film.

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