发明名称 |
Single crystal pulling-up apparatus of pulling-up silicon single crystal and single crystal pulling-up method of pulling-up silicon single crystal |
摘要 |
According to one exemplary embodiment, a single crystal pulling-up apparatus of pulling-up silicon single crystals by a Czochralski method, is provided with: a neck diameter measuring portion which measures a diameter of a grown neck portion; a first compensation portion which outputs a first compensated pulling-up speed for the seed crystals based on a difference between a measured value of the diameter of the neck portion and a target value of the neck portion diameter previously stored; a second compensation portion which outputs a second pulling-up speed while limiting an upper limit of the first pulling-up speed to a first limit value; and a crucible rotation number compensation portion which lowers the number of a rotation of a crucible at least in a period where the upper limit of the first pulling-up speed is limited to the first limit value. |
申请公布号 |
US8936679(B2) |
申请公布日期 |
2015.01.20 |
申请号 |
US201113137812 |
申请日期 |
2011.09.14 |
申请人 |
Globalwafers Japan Co., Ltd |
发明人 |
Banba Hironori;Isogai Hiromichi;Abe Yoshiaki;Ishikawa Takashi;Narimatsu Shingo;Nakao Jun;Abiko Hiroyuki;Ohwa Michihiro |
分类号 |
C30B15/22;C30B15/30;C30B29/06 |
主分类号 |
C30B15/22 |
代理机构 |
McGinn IP Law Group, PLLC |
代理人 |
McGinn IP Law Group, PLLC |
主权项 |
1. A single crystal pulling-up apparatus of pulling-up silicon single crystals by a Czochralski method by bringing seed crystals into contact with a molten silicon liquid in a crucible and by growing a neck portion where an enlarged diameter portion and a reduced diameter portion are formed alternately, the apparatus comprising:
a neck diameter measuring portion which measures a diameter of a grown neck portion; a first compensation portion which outputs a first compensated pulling-up speed for the seed crystals based on a difference between a measured value of the diameter of the neck portion obtained from the neck diameter measuring portion and a target value of the neck portion diameter previously stored in a storage portion; a second compensation portion which outputs a second pulling-up speed while limiting an upper limit of the first pulling-up speed to a first limit value; and a crucible rotation number compensation portion which lowers a number of a rotation of the crucible at least in a period where the upper limit of the first pulling-up speed is limited to the first limit value. |
地址 |
Niigata JP |