Chemical vapor diamond deposition device

Abstract

The invention belongs to the chemical vapor deposition field, in particular to a device of a hot wire chemical vapor diamond deposition device. The device comprises a vacuum chamber, a vacuum obtaining system, a cooling system, an air circuit, a hot wire, a mechanical rotating mechanism, a base platform, a control system, a power supply, and a Hall ion source, wherein the Hall ion source is fixedly installed at the top of the vacuum chamber, the end part of the Hall ion source is installed in the vacuum chamber, the bottom of the Hall ion source is installed at the outside of the vacuum chamber, connected to an anode power supply, the air circuit and a cooling water channel and hermetically communicated with the vacuum chamber, and a hole is arranged at the top of the vacuum chamber and used for connecting a cathode power supply and sealing. The device improves the ionization proportion of reaction gas, increases the synthesized diamond SP3 structure, reduces the resistance of a heater strip by 30-35%, has clear crystal grain facet and compact structure, and greatly improves the quality of the synthesized diamond.

Description

technical field [0001] The invention belongs to the field of chemical vapor deposition, in particular to a device for hot wire chemical vapor deposition of diamond. Background technique [0002] At present, the methods of chemical vapor deposition diamond (CVD diamond) mainly include hot wire method, microwave method, plasma spray method and so on. The existing hot wire CVD diamond device is mainly composed of vacuum chamber, power supply, vacuum system and control system, such as figure 1 shown. It mainly includes vacuum chamber, vacuum obtaining equipment, hot wire frame and power supply, cooling water and refrigeration equipment, gas circuit, mechanical rotating mechanism, control system, etc. Its working principle is: under a certain low pressure condition, the heating wire is heated, and the reaction gas (such as methane / ethanol / hydrogen, etc.) is introduced into the vacuum chamber, and the gas is decomposed and excited by pyrolysis, and a large number of reaction par...

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Problems solved by technology

[0004] In the prior art, there has not been a device that combines the Hall ion source with the existing CVD diamond device to improve the quality of the diamond.

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