Sapphire seed chuck with double positioning pins

Abstract

The invention relates to a seed chuck used in the process of growth of sapphire and aims to provide a sapphire seed chuck with double positioning pins. The sapphire seed chuck comprises a connector, a transition section and a connection nut, wherein one end of the connector is provided with a screw, a fine pitch internal thread is arranged in the screw, the other end the connector is provided with an installation groove, two sides of the installation groove are respectively provided with at least one pinhole, one end of the transition section is provided with a fine pitch external thread matching with the fine pitch internal thread of the connector, the root of the fine pitch internal thread is provided with a tool withdrawal groove, the connection nut is sleeved on the other end of the transition section, and a contact-making surface of the connection nut and the transition section comprises a conical surface. According to the invention, the size of the installation groove matches with that of a seed, and the center line of the seed coincides with the center line of the seed chuck; a conical surface with a degree of 45 DEG is employed for cooperation between the connection nut and the transition section, so concentricity with an upper shaft is guaranteed after installation; center lines of the double positioning pinholes are located on an installation groove line, so contact stress is dispersed, fracture of the seed is effectively prevented, and convenient processing is realized.

Description

technical field [0001] The invention relates to a seed crystal chuck in the sapphire growth process, in particular to a sapphire seed crystal chuck with double positioning pins. Background technique [0002] There are two commonly used growth methods for sapphire crystals: the Czochralski method (CZ method for short) and the Kyropoulos method (KY method for short, which is called the Kyropoulos method in mainland China). The Kyropoulos method is usually used to grow large-diameter, high-quality, colorless sapphire crystals. The specific process is as follows: (1) Put the pure raw materials into the crucible, and a rotatable and lifting lifting rod is installed above the crucible. A sapphire seed chuck, on which is installed an oriented colorless sapphire seed crystal (note: no color-causing agent is added when growing colorless sapphire, and the seed crystal is also colorless sapphire); (2) heating the raw material to the melting point After melting to form a molten soup, l...

AI Technical Summary

Problems solved by technology

This kind of seed chuck is difficult to process and has been broken, so it is difficult to use on a large scale

The connection structure between the seed chuck and the pull rod is currently mostly of the hoop type. Due to the poor centrality of this structure, it is easy to cause the connection to break during the growth of large-diameter sapphire.

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