OPTICAL THIN FILM MANUFACTURING METHOD AND OPTICAL THIN FILM
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United States of America Patent
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Issued Date -
Sep 28, 2023
app pub date -
May 31, 2023
filing date -
Dec 2, 2020
priority date (Note) -
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Abstract
A method for manufacturing an optical thin film having a first thin film portion and a second thin film portion, on a film formation surface of a base member directly or via an intermediate film. The method comprising forming the first thin film portion on a first film formation portion of the film formation surface; forming a washing-time removal film on the first thin film portion, the washing-time removal film having at least one of a fluff-like structure, a pyramid group-like structure and a pinholder-like structure, and being at least one of aluminum and an aluminum compound; forming the second thin film portion on a second film formation portion of the film formation surface, and on the first film formation portion on which the first thin film portion and the washing-time removal film have been formed; and removing the washing-time removal film and the second thin film portion by washing.
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