Abstract:
The invention relates to a camera tube having a photosensitive target plate to be scanned by an electron beam and formed by a semiconductor plate which on the side to be scanned is provided with a mosaic of regions which form a rectifying junction with or in the semiconductor plate, and in which on the said side, an apertured insulating layer is provided at the area of the regions and is covered by a conductive layer. In order to permit the target plate to be manufactured simply and cheaply, cavities are provided in the semiconductor plate at the area of the regions. Furthermore, a further insulating layer may be provided on the conductive layer and a further conductive layer may be provided on the further insulating layer so as to improve the effect of the camera tube.
Abstract:
A METHOD OF LOCALLY APPLYING A METAL CONTACT TO A SEMICONDUCTOR SURFACE, IN WHICH THE SURFACE IS PARTLY COVERED BY AN INSULATING LAYER, AFTER WHICH A METAL LAYER IS APPLIED TO THE WHOLE SURFACE. BY SUBJECTING THE METAL LAYER IN ACCORDANCE WITH THE INVENTION TO ACOUSTIC HIGH-FREQUENCY VIBRATIONS, THE METAL LAYER IS REMOVED FROM THE INSULATING LAYER AND IS LEFT ADHERING TO THE SEMICONDUCTOR MATERIAL. THE ADHESION MAY BE IMPROVED BY A THERMAL TREATMENT PRIOR TO THE VIBRATION TREATMENT.