Patent ID: 7301980
Filing Date: 2007-11-27
Classification: H01S

Abstract:
1. A gas discharge laser comprising: A) a laser chamber containing a laser gas, the laser gas comprising a halogen, B) two elongated electrode elements defining a cathode and an anode, each of the cathode and anode having an elongated discharge receiving region having a discharge receiving region width defining a width of an electric discharge between the electrode elements in the laser gas, the discharge receiving region defining two longitudinal edges, and the anode comprising: a) a first elongated anode portion comprising a first anode material defining a first anode material erosion rate, located entirely within the discharge receiving region of the anode, b) a pair of second elongated anode portions comprising a second anode material defining a second anode material erosion rate, respectively located on each side of the first anode portion and at least partially within the discharge receiving region; c). an elongated electrode center base portion integral with the first elongated anode portion; and wherein each of the respective pair of second elongated anode portions is mechanically bonded to the center base portion.