DEVICE FOR PRODUCING HIGH-DISSOCIATION PRESSURE COMPOUND SINGLE CRYSTAL

摘要

PURPOSE:To appropriately control the crystal growth by providing a specified observation port at a part of the vessel to be used for enclosing a volatile component to accurately observe the crystal growth at the time of producing a high-dissociation pressure compd. single crystal from a melt. CONSTITUTION:The observation port 2 is provided to a part of the vessel 1 to be used for enclosing the volatile component 6 of a high-dissociation pressure compd., and airtightness is secured. The observation port 2 is formed with a transparent material such as optically polished lens, prism, or flat plate. The crystal growth is accurately observed in this production device, and the crystal growth is appropriately controlled.