Patent ID: 6236445
Filing Date: 2001-05-22
Classification: G02F

Abstract:
A method for making projections from a layer of photodefinable material overlaying a sublayer, wherein the method allows the formation of a number of small, well defined projections of less than about 100 .mu.m in diameter and in height, said projection being of a desired pattern on the sublayer, said method comprising the steps of:masking the photodefinable material to delineate areas from which the projections will be formed;exposing the unmasked areas of photodefinable material to radiation, whereby the irradiated areas of the photodefinable material become resistant to removal; andremoving the nonirradiated areas of the photodefinable material to leave the irradiated areas as projections, each one of said projections having a height proportionately greater than its diameter and said projections being comprised of a substance which has the same coefficient of expansion as the sublayer.