RINGLESS GETTER-PROVIDED ELECTRONIC DEVICE, FIXING METHOD FOR RINGLESS GETTER, AND ACTIVATING METHOD FOR RINGLESS GETTER

摘要

An electronic device such as a vacuum fluorescent display tube for simply fixing simple-structure ringless getters and increasing a degree of freedom in disposing ringless getters. Ringless getters (G11-G13) are fixed to the inner surface of a glass anode substrate (111) by a laser beam. A laser beam, applied to ringless getters (G11-G13) from the outer side of the anode substrate (111), passes through the anode substrate (111) and heats and melts the getters (G11-G13), the inner surface of the substrate (111) being melted by the heating. Since the molten portions of the getters (G11-G13) and the substrate (111) solidify when left cooled, the getters (G11-G13) are fixed to the substrate (111). Ringless getters (G11-G13) are obtained by press-forming a getter material into an arbitrary shape.