Method of manufacturing plate member and plate member

摘要

There is provided a method of manufacturing a plate member including preparing a base plate member having main faces, and performing etching by immersing at least part of the base plate member in an etching liquid while controlling a lowering speed of a liquid surface of the etching liquid on the main faces of the base plate member to a desired lowering speed.

主权项

1. A method of manufacturing a glass plate, the method comprising:
preparing a base glass plate having tapered portions each extending in a longitudinal direction of the base glass plate and each having in which a thickness between main faces of the base glass plate that increases from a facet of the base glass plate toward a center portion of the base glass plate in a width direction of the base glass plate; and softening the base glass plate by heating the base glass plate in a heating furnace to stretch the base glass plate into a glass plate having a desired thickness and a flatness greater than a flatness of the base glass plate, wherein the preparing of a base glass plate comprises: preparing a raw base glass plate that has main faces parallel to each other; and immersing a portion of the raw base glass plate where the tapered portion is to be formed in an etching liquid from a facet of the raw base glass plate in the width direction and etching the raw base glass plate while lowering a liquid surface of the etching liquid.