Method of producing selenium rectifiers

Claim 1

IN THE METHOD OF PRODUCING DRY RECTIFIER CELLS COMPOSED OF A BACK PLATE, A SELENIUM SEMICONDUCTOR BODY AND A COUNTER ELECTRODE, WHICH COMPRISES SUCCESSIVELY DEPOSITING ON THE BACK PLATE A PLURALITY OF SUPERPOSED SELENIUM LAYERS OF WHICH AT LEAST THE FIRST ONE NEAREST THE BACK PLATE CONTAINS A HALOGEN ADDITION AND AT LEAST THE ULTIMATE ONE CLOSEST TO THE COUNTER ELECTRODE AND TO THE ULTIMATELY FORMED BARRIER LAYER CONTAINS AN ADDED BARRIERRESISTANCE PROMOTOR, THE STEPS OF SUBJECTING THE SELENIUM DEPOSITION TO CRYSTALLIZATION AFTER DEPOSITION OF THE PENULTIMATE SELENIUM LAYER, THEREAFTER DEPOSITING THE ULTIMATE SELENIUM LAYER IN AMORPHOUS FORM AND THEREAFTER THE COUNTER-ELECTRODE MATERIAL, AND THEREAFTER SUBJECTING THE RESULTING SANDWICH STRUCTURE TO BARRIER LAYER FORMING AND CRYSTALLIZATION TREATMENT.