Patent ID: 11867938
Assignee: DEXERIALS CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 7:
8. A method of manufacturing a polarizing plate comprising:
a step of laminating alternately high-refractive index layers and low-refractive index layers on both sides of a transparent substrate, and forming a first antireflection layer and a second antireflection layer on them,
a step of laminating a reflective layer, a dielectric layer, and an absorbing layer in this order on the first antireflection layer to form a laminate,
a step of processing the laminate to form a plurality of protrusions that are periodically arranged at a pitch shorter than the wavelength of light in use band, and
a step of etching a non-overlapped region of the first antireflection layer that does not overlap with the plurality of protrusions through the plurality of protrusions,
wherein a layer of the first antireflection layer farthest from the transparent substrate is an outermost layer, and a non-overlapped region that does not overlap with the plurality of protrusions of the outermost layer is recessed toward the transparent substrate from an overlapped region that overlaps the plurality of protrusions of the outermost layer.