Patent ID: 9651727
Date: 2017-05-16
CPC Classifications: G02B

Claim:
1. A polarizer for polarizing a light of a known wavelength, comprising: a base substrate; and a metal pattern formed of only one of aluminum, molybdenum and tungsten, the metal pattern disposed on the base substrate and forming a wire grid, the wire grid having a width and a height and being spaced apart from an adjacent wire grid by a separation distance, wherein the wire grid has a fill factor that falls within a range that is based on an extinction ratio of polarization and a transmittance of the polarizer, the fill factor being obtained by dividing the width by a pitch, wherein the pitch is a sum of the width and the separation distance, wherein the pitch of the wire grid is less than 90 nm, wherein the wire grid is a single layer which includes the metal pattern, when the metal pattern is only formed of aluminum (Al), then the fill factor is about 0.2 to about 0.4, and the height of the wire grid is about 130 nm to about 200 nm; when the metal pattern is only formed of molybdenum (Mo), then the fill factor is about 0.1 to about 0.2, and the height of the wire grid is about 100 nm to 200 nm; when the metal pattern is only formed of tungsten (W), then the fill factor is about 0.05 to about 0.15, the height of the wire grid is about 70 nm to about 200 nm.