PERFORATED PLATE-SHAPED MATERIAL AND METHOD OF MANUFACTURING THE SAME

摘要

A perforated plate-shaped material in which a surface property/shape of a main surface of the plate-shaped material is maintained in at least a part of a hole surface forming a hole in the plate-shaped material are provided. The perforated plate-shaped material has at least one through hole penetrating from a first main surface to a second main surface opposite thereto, and in its cross-sectional shape, it has a smallest width portion on the hole surface and a first main surface portion where the hole surface terminates on the first main surface and includes a first projecting curve portion between the first main surface portion and the smallest width portion, and at least a part of the first projecting curve portion has a surface property/shape of a non-hole surface on the first main surface.

主权项

1. A perforated plate-shaped material having at least one through hole penetrating from a first main surface to a second main surface which is a main surface opposite to the first main surface, comprising, in a cross-sectional shape of the through hole in a plane perpendicularly intersecting, at a certain point on a contour of a perpendicularly projected image of the through hole onto the first main surface, with a tangent of the contour at the point:
a smallest width portion on a hole surface providing an end portion of a smallest width representing a width of the perpendicularly projected image of the through hole onto the first main surface and a first main surface portion where the hole surface of the through hole terminates on the first main surface; and a first projecting curve portion in a portion extending from the first main surface portion to the smallest width portion, at least a part of the first projecting curve portion having a surface property/shape of a non-hole surface other than the hole surface on the first main surface.