Regulating cylinder unit in a single-crystal pulling apparatus and a jig for installing them
First Claim
1. A regulating cylinder unit for a semiconductor single-crystal pulling apparatus, comprising:
- a first regulating cylinder;
a second regulating cylinder, said first and second regulating cylinders concentrically surrounding a semiconductor single crystal within said semiconductor single-crystal pulling apparatus; and
first engaging means for engaging a lower end of said second regulating cylinder with an upper end of said first regulating cylinder.
1 Assignment
0 Petitions
Accused Products
Abstract
Regulating cylinder unit is divided into three parts, a third regulating cylinder shaped essentially like a cylinder and installed on the protection cylinder; a first regulating cylinder and a second regulating cylinder which are shaped like reversed truncated cones with different diameters and are capable of engaging with the third regulating cylinder. In addition, the second and third regulating cylinders are brought together in a preset ordering, that is, a flange formed at the outer peripheral rim of the upper end of the second regulating cylinder is engaged with a stepped portion of the third regulating cylinder, and a flange formed at the outer peripheral rim of the upper end of the first regulating cylinder is engaged with a flange formed at the inner peripheral rim of the lower end of the second regulating cylinder.
19 Citations
7 Claims
-
1. A regulating cylinder unit for a semiconductor single-crystal pulling apparatus, comprising:
-
a first regulating cylinder; a second regulating cylinder, said first and second regulating cylinders concentrically surrounding a semiconductor single crystal within said semiconductor single-crystal pulling apparatus; and first engaging means for engaging a lower end of said second regulating cylinder with an upper end of said first regulating cylinder. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A regulating cylinder-installing jig which is used to install at least a first and a second regulating cylinder, comprising:
-
a dummy seed capable of being removably fixed to a seed chuck, and a plurality of hooks swingably suspended at a lower end of said dummy seed via wires; wherein each hook has at least two engage portions that retain a lower end of each regulating cylinder at each preset location.
-
Specification