Entladungsrohr

摘要

A discharge tube (1) which assures stabilized discharging, is reduced in overall size and easy to manufacture is disclosed. The discharge tube (1) comprises a cylindrical envelope (2) made of an insulating substance, discharge gas enclosed in the envelope (2), and a pair of discharge electrodes (5a, 5b) disposed in an opposing relationship to each other at the opposite ends of the envelope (2). The discharge electrodes (5a, 5b) are formed as parallel plate electrodes wherein faces (5a'', 5b'') thereof facing the inside of the envelope (2) extend flat and in parallel to each other. A pair of conductive layers (3a, 3b) formed on the envelope (2) in an opposing relationship to and electrically connected to the discharge electrodes (5a, 5b), and one of the conductive layers (3a, 3b) is opposed at least part thereof with the other conductive layer with a portion of the envelope (2) interposed therebetween.