Polarizing plate and polarizing plate manufacturing method
AssigneeDexerials Corporation
InventorAkio Takada
Life of this patent
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Abstract
A polarizing plate capable of achieving high reliability and a method for manufacturing a polarizing plate. The polarizing plate includes a transparent substrate that is transparent to light of a used wavelength band; a metal grid in which a reflective layer made of a metal is arranged to extend in a predetermined direction on the transparent substrate at a pitch finer than a wavelength of light of the used band; a metal subgrid made of the same metal as the reflective layer formed on the metal grid at a pitch finer than that of the metal grid; and an absorbing layer made by filling a light absorbing material into a recess of the metal subgrid.
Claims15
A polarizing plate comprising:
- a transparent substrate that is transparent to light of a used wavelength band;
- a metal grid in which a reflective layer made of a metal is arranged to extend in a predetermined direction on the transparent substrate at a pitch finer than a wavelength of light of the used band;
- a metal subgrid made of the metal formed on the metal grid at a pitch finer than that of the metal grid;
- and
- an absorbing section including a light absorbing material formed on the metal subgrid.
A method for manufacturing a polarizing plate comprising:
- forming a subgrid pattern on a surface of a metal layer film-formed on a transparent substrate that is transparent to light in a used wavelength band;
- forming an absorbing layer by filling a light absorbing material in a recess of the subgrid pattern;
- and forming a grid pattern arranged to be at a pitch finer than a wavelength of light in the used band by etching a metal layer,
- to manufacture a polarizing plate having the transparent substrate, a metal grid extending in a predetermined direction in which a reflective layer made of a metal is arranged on the transparent substrate at a pitch finer than the wavelength of light of the used band, a metal subgrid made of the metal formed on the metal grid at a pitch finer than that of the metal grid, and an absorbing section formed by filling the light absorbing material in a recess of the metal subgrid.
A method for manufacturing a polarizing plate comprising:
- forming a subgrid pattern on a surface of a metal film layer film-formed on a transparent substrate that is transparent to light in a used wavelength band;
- forming a grid pattern arranged at a pitch finer than a wavelength of light in the used band by etching a metal layer;
- and
- vapor depositing a light absorbing material on an upper portion of the subgrid pattern,
- to manufacture a polarizing plate having the transparent substrate, a metal grid extending in a predetermined direction in which a reflective layer made of a metal is arranged on the transparent substrate at a pitch finer than the wavelength of light of the used band, a metal subgrid made of the metal formed on the metal grid at a pitch finer than that of the metal grid, and an absorbing section formed by vapor depositing the light absorbing material on an upper portion of the metal subgrid.
Dependencies are inferred from the claim text.