Patent ID: 6238583
Filing Date: 2001-05-29
Classification: G02B

Abstract:
A process for producing a structure of color filter elements on a carrier surface, comprising the sequential steps of:depositing a first lift-off coating;patternwise exposing, and developing the first lift-off coating to expose first areas of the carrier surface;depositing a first color filter layer onto the first lift-off coating and the first exposed areas of the carrier surface;depositing a first sacrificial layer on the first color filter layer;removing the first lift-off coating and the portions of the first color filter layer and first sacrificial layer deposited thereon, thereby forming a first color filter element;depositing a second lift-off coating;patternwise exposing, and developing the second lift-off coating to expose second areas of the carrier surface;depositing a second color filter layer onto the second lift-off coating and the second exposed areas of the carrier surface;depositing a second sacrificial layer on the second color filter layer;removing the second lift-off coating and the portions of the second color filter layer and second sacrificial layer deposited thereon, thereby forming a second color filter element and remaining exposed areas of the carrier surface;depositing a third lift-off coating;patternwise exposing, and developing the third lift-off coating to expose the remaining areas of the carrier surface that have not been coated with filter elements;depositing a third color filter layer onto the third lift-off coating and the remaining exposed areas of the carrier surface;depositing a third sacrificial layer on the third color filter layer; andremoving the third lift-off coating and therewith the portions of the third color filter layer and the third sacrificial layer deposited on the third color filter layer, thereby leaving the third sacrificial layer on the unremoved portions of the third color layer; andremoving at least a part of the first, second and third sacrificial layers that are present on the first, second and third color filter elements on the carrier surface.and removing the sacrificial layer;wherein the sacrificial layer material is selected to withstand the removal of the lift-off coatings.