Method for reducing defects in pulling germanium single crystals
By using a detachable cylindrical laser to assist in centering in germanium single crystal pulling growth equipment, the problem of insufficient centering of components such as the pulling rod was solved, which improved the growth quality and operation efficiency of germanium single crystals and reduced the defect rate.
Patent Information
- Application Number
- CN202610823793.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-09
- Publication Date
- 2026-09-25
AI Technical Summary
In existing germanium single crystal pulling growth equipment, the alignment of the pulling rod, crucible rod, crucible support, outer graphite crucible, inner quartz crucible, and seed crystal chuck is insufficient, resulting in eccentric growth during the germanium single crystal growth process. This leads to stress concentration and dislocation defects, affects solid-liquid interface control, and reduces single crystal yield and operating efficiency.
A cylindrical laser that can be detachably mounted on the lifting rod and crucible rod is used to assist the operator in accurately centering the lifting rod, crucible rod, crucible support, outer graphite crucible, inner quartz crucible and seed crystal chuck, so that they are in a straight line extending in the vertical direction, ensuring the geometric alignment.
It improves the quality and efficiency of germanium single crystal Czochralski growth, reduces the defect rate, reduces raw material waste, and shortens the settling time.