Patent ID: 9690198
Date: 2017-06-27
CPC Classifications: G03F

Claim:
1. A method for patterning a non-linear metallic thermal resist, the method comprising: identifying a first threshold level of exposure, to incident radiation, of a reference structure of a first two-layer stack of respective different first and second metallic materials on a first substrate forming a second thin-film stack on a second substrate, the second thin-film stack (i) containing at least N=3 alternating layers of said different first and second materials, (ii) having a second threshold level of exposure to the incident radiation that is more than ten times lower than the first threshold level of exposure while, at the same time, and (iii) having an overall thickness that is equal to the total thickness, by employing at least one of: wherein the second threshold level of exposure is a threshold level of exposure required to form an alloy of said first and second materials in said second thin-film stack; projecting a first pre-determined spatial distribution of said incident radiation on the second thin-film stack to cause formation of the alloy of the first and second materials in first areas of said second thin-film stack heated by said incident radiation above a eutectic temperature corresponding to the second threshold level of exposure that is insufficient to cause formation of alloy of the first and second materials in the first two-layer stack.