MICROWAVE PLASMA CHEMICAL VAPOR DEPOSITION DEVICE

    公开(公告)号:US20240158910A1

    公开(公告)日:2024-05-16

    申请号:US18109873

    申请日:2023-02-15

    摘要: A microwave plasma chemical vapor deposition device, including a microwave generator, an isolator, a 3-stub microwave tuner, a microwave mode converter, and a short-circuiting waveguide tuner connected successively is disclosed. A microwave antenna and an upper cooling air inlet stretching into a microwave cavity and corresponding to the upper side of a quartz window are arranged on the microwave mode converter, the quartz window located in the microwave cavity is arranged below the microwave mode converter, a metal molybdenum stage is arranged on a sample stage in the microwave cavity, and a cooling water channel is arranged on the microwave cavity. The structure of the cavity, the sealing structure of the quartz window, heat dissipation and the like of the microwave plasma chemical vapor deposition device disclosed by the present invention are improved, so that the product quality of a diamond film produced by deposition is improved.

    Plasma chemical vapor deposition apparatus

    公开(公告)号:US11956884B2

    公开(公告)日:2024-04-09

    申请号:US17747068

    申请日:2022-05-18

    申请人: Draka Comteq B.V.

    IPC分类号: H05H1/46 C23C16/40 C23C16/511

    摘要: The invention relates to a plasma chemical vapor deposition (PCVD) apparatus for deposition of one or more layers of silica onto an interior wall of an elongated hollow glass substrate tube. The apparatus comprises a microwave generator, a plasma generator receiving microwaves from said generator in use, a cylindrical cavity extending through said generator, and a cylindrical liner positioned in the cavity. The substrate tube passes through the liner in use. The cylindrical liner has at least one section having a reduced inner diameter over a part of the length of the liner, the at least one section providing a contact zone for the substrate tube. The microwave generator is configured to generate microwaves having a wavelength Lw in the range of 40 to 400 millimeters, wherein a length of said at least one section having the reduced inner diameter is at most 0.1×Lw.