METHOD AND DEVICE FOR STRETCHING CRYSTALS FROM MELT

摘要

1. CONTROL METHOD FOR PROCESS OF CRYSTAL PULLING melt by feeding dosages depending on the level of the melt and the crystal diameter control according to the temperature of the melt, characterized in that, with the reliability tselyupovysheni adjusting the diameter of the growing crystal, a predetermined time interval between fed-measured actual intervals time between recharge, and melt temperature varied by the deviation of intervals of a predetermined value. 2. The process control device pulling crystal from the melt, comprising feeding system control circuit melt level in the crucible, the contour controlling crystal diameter and melt level sensor, characterized in that in order to increase the reliability of the apparatus, the contour controlling crystal diameter measuring unit comprises time intervals between dosage recharge, whose input is connected to the output of the melt level sensor, the programmer specified time intervals and comparing block, wherein the outputs of the programmer and blo and measuring the time intervals between the (L dy recharge unit connected to the comparison input of these intervals.