Patent ID: 9017493
Filing Date: 2015-04-28
Classification: B21J,C22F,C23C

Abstract:
1. A method of manufacturing a sputtering target, comprising: forging an ingot formed of metal having a substantially cylindrical shape by applying a stress in a first axis direction parallel to an axial direction of the ingot; forging the ingot by applying a stress in a plane direction orthogonal to the first axis direction to deform the ingot from the cylindrical solid shape to a rectangular parallelepiped shape; additionally forging the ingot by applying a stress in a second axis direction obliquely intersecting with a direction parallel to the first axis direction; applying the stress in the second axis direction includes compression-deforming the ingot having the rectangular parallelepiped shape between opposed corners of the ingot; and heat-treating the ingot at a temperature equal to or higher than a recrystallization temperature thereof.