Patent ID: 6729926
Filing Date: 2004-05-04
Classification: H01J

Abstract:
A method for making a magnetron wherein said magnetron comprises:an anode cylinder; a plurality of vanes arranged radially within said anode cylinder; a magnetic piece disposed at an open end section of said anode cylinder; an anode vacuum container, including a metal container covering an upper surface of said magnetic piece; a cathode disposed along a central axis of said vacuum container; and an antenna externally discharging microwaves; said method having steps comprising: placing said magnetic piece and said metal container, in that order, on a shelf formed inwardly on a thin end section projecting from said open end section of said anode cylinder; forming a predetermined number of projections projecting inwardly from said thin end section of said anode cylinder, whereby said metal container is loosely secured; and tightly welding said thin end section with said metal container.