Patent ID: 7097091
Filing Date: 2006-08-29
Classification: B23K,H01L

Abstract:
1. A friction stir welding method for welding by inserting a pin portion of a rotary tool having said pin portion and a shoulder portion to abutment surfaces of two members to be welded which differ in physical properties and/or mechanical properties, and moving said rotary tool along said abutment surfaces, wherein said pin portion is inserted only to one of said members, said pin portion is not inserted to the other of said members, only said shoulder portion is set in contact with the other of said members, and, while this condition is maintained, said rotary tool is moved, and wherein a plate of the same material as said member on the side where said pin portion of said rotary tool is inserted is disposed at an upper portion of said abutment surfaces of said two members to be welded, and said shoulder portion of said rotary tool is set in contact with said plate.