半導体に関する研究（第8報）亜酸化銅整流板の特性におよぼす銅素材中の非金属性不純物の影響

Abstract

In order to supply fundamental data for the production of cuprous oxide rectifiers of high quality, the effects of non-metallic and gaseous elements included in copper on the rectifying properties were studied. In this study, the measurement of the rectifying characteristics, their temperature dependence and the change of forward current at 0.8V and reverse current at 6 V in running test was carried out and the following results were obtained: (1) When the copper contains 0.1% P, it is impossible to make rectifying disks mainly because of nonadherence of the oxide layer. As increasing the phosphorus content is increased from 0.001% to 0.01%, the rectifying resistance increases in the conducting direction, while it decreases in the reverse direction. (2) With the increase of sulphur content from 0.001% to 0.1%, the rectifying re istance decreases in both directions. (3) When copper contains oxygen corresponding to 1.5×102 mm HgO2, the rectifier shows the highest efficiency, in comparison with copper containing various other elements. (4) By increasing the chlorine content from 0.01% to 10%, the rectifying resistance decreases in both directions and on introduction of 0.0002% Cl2 into the first heat treatment furnace improves the rectifying characteristics. (5) The forward current in running test increases in the first few minutes, but afterwards it is kept almost constant. (6) The creeping percentage increases fast in the first few minutes and afterwards gradually. A rectifying disk containing 0.01% P or 10% Cl shows high creeping property.