美国研制成一种固体变象管,它具有灵敏度高、速度快的优点,是一种光致电容型器件。光致电容型变象管结构原理图这种光致电容型变象管的结构如图所示:在半导体层的背面是一层欧姆接触层,在它的正面是一层绝缘层,在绝缘层上则是用沉积法制成的一组透明的导电条形电极。在选择欧姆接触层的材料时,应当使器件在未加偏压时半 The United States developed a solid image tube, it has the advantages of high sensitivity, high speed, is a photoconductive device. Photoconductive Image Tube Structure This photoconductive image tube has a structure as shown in the figure. The back surface of the semiconductor layer is an ohmic contact layer. On the front surface of the photoconductor tube is an insulating layer, Layer is deposited by the deposition of a group of transparent conductive strip electrodes. When choosing materials for ohmic contact layers, the device should be made half unbiased