Patent ID: 7736833
Filing Date: 2010-06-15
Classification: G03F,Y10S

Abstract:
1. A method comprising: disposing on a surface, a layer of anti-reflective coating (ARC) material, said layer of ARC material having a thickness of between about 1000 Å and 10000 Å and comprising an optically tuned planarizing layer, said tuned layer having an index of refraction layer (n) from about 1.4 to about 2.1, and an extinction coefficient (k) from about 0.1 to 0.6 at 365, 248, 193 and 157 nm, comprising a polymeric resin, said polymeric resin being selected from the group consisting of novolac resin, polysulfones, polyhydroxystyrene based materials, polyimide materials cast from solvents containing no amines, and blends thereof, said polymeric resin containing a covalently bonded chromophore used to modulate the optical properties of said material and a variety of wavelengths; disposing on said layer of ARC material, a top layer of material having a thickness of 1000 Å to 4000 Å which is a resist material, wherein when said top layer resist material is a bilayer resist, said resist is selected from the group consisting of Si-containing acrylates/methacrylates, Si-containing styrene derivatives, Si-containing norbornene materials, silsquioxanes, silanes, siloxanes, said top layer of resist material having a crosslink density sufficiently high that said ARC material and said resist material do not substantially intermix, there is no interfacial reaction and there is no diffusion from one said layer to another; said resist is exposed to energy to form a pattern in said resist; said energy is a particle beam; wherein said particle beam is an electron beam; forming a pattern in said resist material, developing said pattern to form a sub 200 nm feature in said layer of material.