Abstract: A bank has an opening including a first opening and a second opening. The second opening extends from the first opening in such a direction that the second opening overlaps the first electrode. The second opening at least partially overlaps the first electrode. The first electrode has an end close to the first opening and overlapping the second opening. The second opening has a maximum width smaller than a maximum width of the first opening. The widths are measured perpendicular to the direction in which the second opening extends from the first opening.

Abstract: Provided is a crack repair method of melting and eliminating a crack generated in a steel material, the method including holding a tab plate in surface contact with the steel material in which the crack is generated, thereafter continuously irradiating the tab plate to a first end portion of the crack in the steel material with a laser beam, and subsequently continuously irradiating the crack with the laser beam along the crack to a second end portion of the crack to melt and eliminate the crack. Consequently, when eliminating the crack generated in a constituent member of an existing structure or a constituent member such as a machine component, the crack can be eliminated without forming a through hole in the constituent member.