Patent ID: 11932961
Assignee: XI'AN ESWIN SILICON WAFER TECHNOLOGY CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 6:
7. A single crystal pulling apparatus, comprising:
an assembly sleeve having an inner cylinder, an outer cylinder and a bottom cylinder, wherein the outer cylinder is provided with openings at both ends of the outer cylinder and sleeved onto the inner cylinder;, wherein the bottom cylinder is arranged at the opening at a lower end of the outer cylinder, and comprises an annular plate and a lower cylinder;
wherein each of the inner cylinder and the lower cylinder is of an inverted-cone shape, an upper end of the inner cylinder is connected to an upper end of the outer cylinder, an outer edge of the annular plate is hermetically connected to the lower end of the outer cylinder, an inner edge of the annular plate is connected to an upper end of the lower cylinder, and a lower end of the inner cylinder is fixedly connected to an upper surface of the annular plate; and
wherein a first filler and a second filler are provided in a chamber defined by the inner cylinder, the outer cylinder and the annular plate, the first filler is arranged above the second filler, the first filler is made of a thermally conductive material, and the second filler is made of a thermal insulation material.