Patent ID: 11891718
Assignee: SK SILTRON CO. LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 2:
3. A method of growing a silicon single crystal ingot, the method comprising:
growing a silicon single crystal ingot having crystal orientation of (111) using Czochralski method;
determining a diameter of the silicon single crystal ingot;
calculating a length of a facet of the silicon single crystal ingot; and
determining whether to perform correction for a rotation speed of a seed or a pulling speed of the silicon single crystal ingot based on the calculated facet length;
wherein, in the calculating the length of the facet of the silicon single crystal ingot, a change in the diameter of the silicon single crystal ingot caused by the rotation of the seed is measured by an automatic diameter control (ADC) sensor at intervals of ten times per second,
wherein the calculating of the length of the facet includes calculating a facet length S1 by a formula of S1=2R×sin(3B), where B rpm (revolutions per minute) denotes a rotation speed of the seed and R denotes the diameter of the silicon single crystal ingot, and
wherein, when an absolute value of a difference between the calculated facet length S1 and a preset facet length S0 is 5 mm or less, the rotation speed of the seed and the pulling speed of the silicon single crystal ingot are determined to be maintained without change.