JPS5560090A - Crucible for production of single crystal - Google Patents
Crucible for production of single crystalInfo
- Publication number
- JPS5560090A JPS5560090A JP13043178A JP13043178A JPS5560090A JP S5560090 A JPS5560090 A JP S5560090A JP 13043178 A JP13043178 A JP 13043178A JP 13043178 A JP13043178 A JP 13043178A JP S5560090 A JPS5560090 A JP S5560090A
- Authority
- JP
- Japan
- Prior art keywords
- crucible
- single crystal
- bending
- side wall
- high quality
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
PURPOSE: To easily produce a high quality, long size single crystal without bending in pulling by forming a noble metal crucible into an inverted trapezoid section to reduce the after-heater effect of the crucible side wall due to a melt level lowering.
CONSTITUTION: In production of an X axis-pulled LiTaO3 or LiNbO3 single crystal by the Cyochralski method using a noble metal crucible such as a Pt-Rh alloy crucible, the crucible is formed into an inverted trapezoid section of (D-d)/2H= 0.03W0.10, supposing the upper edge diameter of the crucible to be D, the bottom diameter to be d, and the height to be H. As a result, heat radiation on the crucible side wall exposed owing to a melt level lowering is turned upward to minimize influence on a temp. gradient in the vicinity of the crystal growing interface. Accordingly, a high quality, long size single crystal is obtd. without bending.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13043178A JPS5560090A (en) | 1978-10-25 | 1978-10-25 | Crucible for production of single crystal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13043178A JPS5560090A (en) | 1978-10-25 | 1978-10-25 | Crucible for production of single crystal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5560090A true JPS5560090A (en) | 1980-05-06 |
Family
ID=15034065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13043178A Pending JPS5560090A (en) | 1978-10-25 | 1978-10-25 | Crucible for production of single crystal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5560090A (en) |
-
1978
- 1978-10-25 JP JP13043178A patent/JPS5560090A/en active Pending
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