Optical films and methods of making the same
AssigneePolarization Solutions, LLC
InventorsQihong Wu, Kelvin Xu Zhang, Shiaw-Wen Tai
Life of this patent
Estimating the term…
Abstract
In general, in a first aspect, the invent features a method, including providing a layer having a plurality of spaced-apart lines of a first material extending along a first direction and forming a line of a second material on opposing surfaces of each line of the first material, the first and second materials being different and adjacent lines of the second material being discontinuous. After forming the lines of the second material, forming pairs of spaced-apart lines of a third material between adjacent pairs of the lines of the second material, wherein each line of the third material is spaced apart from the closest line of the second material and the first and third materials are different.
Claims21
A method, comprising:
- providing a layer comprising a plurality of spaced-apart lines of a first material extending along a first direction;
- forming a line of a second material on opposing surfaces of each line of the first material, the first and second materials being different and adjacent lines of the second material being discontinuous;
- after forming the lines of the second material, forming pairs of spaced-apart lines of a third material between adjacent pairs of the lines of the second material,
- wherein each line of the third material is spaced apart from the closest line of the second material and the first and third materials are different.
18-29. (canceled)
A method, comprising:
- forming a first conformal layer of a first material over a first grating comprising a plurality of lines of the second material different from the first material;
- removing portions of the first conformal layer to provide a second grating comprising lines of the first material;
- forming a second conformal layer of a third material over the second grating;
- and
- removing portions of the second conformal layer to provide a third grating comprising lines of the third material and the lines of the first material,
- wherein the third grating transmits 20% or more of light of wavelength λ having a first polarization state incident on the layer along a path, transmits 2% or less of light of wavelength λ having a second polarization state incident on the layer along the path, the first and second polarization states being orthogonal, and λ is 400 nm or less.
An article, comprising:
- a layer extending in a plane, the layer comprising:
- a plurality of spaced-apart lines of a first material extending along a first direction in the plane, each of the lines of the first material having a thickness, t1, along a second direction perpendicular to the plane;
- a plurality of spaced-apart lines of a second material extending along the first direction, each of the lines of the second material having a thickness, t2, along the second direction, t2 being less than t1, and each line of the second material being spaced-apart from a closest line of the first material,
- wherein the first and second materials have a respective refractive index of 1.8 or more and a respective extinction coefficient of 1.8 or more for a wavelength λ that is 400 nm or less, and
- the layer transmits 20% or more of light of wavelength λ having a first polarization state incident on the layer perpendicular to the plane, transmits 2% or less of light of wavelength λ having a second polarization state incident on the layer along the path, the first and second polarization states being orthogonal.
Dependencies are inferred from the claim text.