Patent ID: 6432796
Filing Date: 2002-08-13
Classification: H01L

Abstract:
A method of marking a microelectronic device having a microelectronic die including an integrated circuit, the method comprising:applying a marking medium having a transfer medium and an outer contrast film on one side of the transfer medium to at least one of the microelectronic die and/or a package that encases the microelectronic die by adhering the outer contrast film to the die and/or the package, wherein the outer contrast film has a high optical contrast with respect to a material under the outer contrast film; removing the transfer medium from the outer contrast film leaving the marking medium attached to the surface on either the microelectronic die or the package that encases the microelectronic die; and selectively removing a portion of the outer contrast film to leave a patterned portion of the outer contrast film on the microelectronic device by exposing the portion of the outer contrast film to a selected radiation until the selected radiation consumes the portion of the outer film.