Method of producing monocrystalline semiconductor rods

Claim 1

IN A METHOD OF PRODUCING A MONOCRYSTALLINE SEMICONDUCTOR ROD OF MORE THAN 25 MM. DIAMETER BY PULLING IT FROM A MELT WITH THE AID OF A CRYSTAL SEED AND A PAIR OF INDUCTION HEATING COILS, THE STEPS OF FORMING A DOWNWARDLY EXTENDING RECESS FROM A SOLID RIM IN THE UPPER END OF A VERTICALLY DISPOSED THICK SEMICONDUCTOR ROD WHICH SUPPORTS MOLTEN MATERIAL CREATED THEREIN, INSERTING A FIRST ONE OF THE SAID INDUCTION HEATING COILS, HAVING DIMENSIONS SMALLER THAN THE HORIZONTAL CROSS SECTION OF THAT OF THE RECESS, INTO THE RECESS FOR HEATING SEMICONDUCTOR MATERIAL THEREIN TO THE MOLTEN STATE, AND PLACING THE SECOND INDUCTION HEATING COIL AT A LOCATION ABOVE THE FIRST COIL AND EXTENDING OVER THE SOLID RIM OF THE THICK ROD SURROUNDING THE RECESS SO AS TO CONCENTRATE THE HEATING ACTION THEREOF ON AT LEAST A PORTION OF THE RIM TO CAUSE SOLID MATERIAL LOCATED AT SAID RIM TO BECOME MOLTEN AND DROP INTO SAID RECESS.