| 摘要 |
PURPOSE:To fully hold the airtightness of an image pickup tube and reduce the resistivity of the signal removal electrode for a transparent electrode by applying a small resistivity conductive material to the electrode. CONSTITUTION:For example, a gold thin film 14 on which a small electric resistance gold is deposited is formed at a transparent electrode 2 consisting of a tin oxide film and the signal removal electrode 2a within a signal removal section 2a which are formed on a faceplate 1 and the electric resistance of this signal removal electrode 2a is almost zero ohm. In this case, since the region of the transparent electrode 2 consisting of tin oxide forms an optical exposure section, the gold thin film 14 cannot be formed, and the gold film 14 is applied and formed only on the tin oxide film of the signal removal electrode 2a. As a result, the airtightness of an image pickup tube is fully held. Besides, the electric resistance of the signal removal section can be reduced and the signal current leak can be prevented against a high picture signal frequency. |
