Anisotropic Conductive Film (ACF)

 ACF is commonly used in post liquid crystal display manufacturing to make the electrical and mechanical connections from the driver electronics to the glass substrates of the LCD.
ACF is also  used to perform the flex-to-board or flex-to-flex connections used in handheld electronic devices such as mobile phones, MP3 players, or in the assembly of CMOS camera modules.
More information can be found here.