Patent ID: 11971568
Assignee: DEXERIALS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  F | IPC G

Claim 8:
9. A method of manufacturing a polarizing plate having a wire grid structure, comprising:
a reflective layer forming step of forming a reflective layer on one surface of a transparent substrate;
a dielectric layer forming step of forming a dielectric layer on one surface of the reflective layer farther from the transparent substrate;
an absorption layer forming step of forming an absorption layer on one surface of the dielectric layer farther from the reflective layer; and
an etching step of forming a plurality of grid-like projection portions arranged on the transparent substrate at a pitch shorter than a wavelength of light in a used bandwidth, and extending in a predetermined direction, by selectively etching a formed laminate,
wherein the etching step comprises isotropic etching and anisotropic etching to etch the reflective layer on which the plurality of grid-like projection portions are formed,
wherein the reflective layer, when viewed in the predetermined direction, comprises:
a rectangle portion having a bottom on the transparent substrate side, and
a shape with a first width changing in a continuous manner,

wherein the bottom of the rectangle portion has a second width that is largest,
wherein the dielectric layer and the absorption layer, when viewed in the predetermined direction, are rectangular and have a third width that is the same as the second width of the bottom of the rectangle portion of the reflective layer, and
wherein the shape of the reflective layer is formed of a curved line.