6 results about "Crystal oven" patented technology

The invention discloses a device for adjusting the constant-temperature frequency of a surface-mounted crystal, and relates to the technical field of clock frequency adjustment. The device comprises a fixing tool, a conversion tool, a testing tool and a heating tool of the surface-mounted crystal, the fixing tool is used for fixing a surface-mounted crystal; the conversion tool is connected with the fixing device and is used for realizing conversion from a surface mounting type to a plug-in mounting type; the test tool is used for installing a plurality of groups of fixed tools and conversion tools and communicating with the outside to realize batch frequency measurement; and the test tool is arranged in the heating tool and is used for heating high-temperature inflection points of the surface-mounted crystals and adjusting the metal spraying frequency of the surface-mounted crystals. According to the invention, surface-mounted product communication and frequency adjustment are realized, the communication problem of batch products is solved, and the compensation consistency of high-index crystal oscillators is improved.

The utility model discloses a water-cooled heat shield device and a crystal furnace, the water-cooled heat shield device comprises a heat shield body, a plurality of crystal pulling channels and a medium channel, the plurality of crystal pulling channels penetrate through at least part of the heat shield body, and the crystal pulling channels are used for moving crystal bars; the medium channel is located in the heat shield body, and at least part of the crystal pulling channel is coated with the medium channel; an inlet of the water outlet channel is communicated with the containing cavity, and the inlet of the water outlet channel is higher than an outlet of the water inlet channel. The utility model aims to provide the water-cooled heat shield device, and the cooling efficiency of the water-cooled jacket can be improved based on the device.

The application discloses a crystal ring control device, and relates to the technical field of semiconductors. The crystal ring control device comprises a furnace body, the furnace body is provided with a linear light channel and an air extraction flow channel communicated with the linear light channel, a nonlinear crystal is arranged in the linear light channel, a light beam incident to the linear light channel is emitted after passing through the nonlinear crystal, and sealing structures are arranged in the linear light channel and located at opposite sides of the nonlinear crystal respectively. The sealing structures are provided with light transmission regions, the linear light channel and the sealing structures form a sealed chamber, an air extraction device is connected to an opening of the air extraction flow channel, and the sealed chamber is vacuumized through the air extraction device. The crystal ring control device can maintain a dry and clean environment in the crystal furnace through overall sealing and internal low pressure, simplifies the structure of the crystal ring control device and improves the stability of the crystal ring control.

The application relates to the technical field of single crystal growth, and discloses a control method of a crystal furnace; the method comprises the following steps: obtaining basic operation parameters, determining whether the crystal furnace meets operation and maintenance control requirements, collecting comprehensive operation parameters of the crystal furnace in a collection period, predicting a crystal state value in a next collection period, determining whether to issue a control prompt, identifying control target data, formulating corresponding optimization control instructions, and controlling the crystal furnace to execute the optimization control instructions; compared with the prior art, the crystal state value in the next collection period can be accurately and in advance predicted according to the crystal furnace operation data in the last collection period, so that a low-quality phenomenon of the single crystal material can be in advance predicted, control instructions corresponding to the control target data can be formulated and executed, the crystal furnace can implement optimization control measures before the low-quality phenomenon of the crystal appears, and the problem of control lag caused by the real-time collection data real-time analysis and prediction mode can be effectively avoided.

The invention discloses real-time monitoring feedback control equipment for a crystal furnace and a monitoring method, and relates to the technical field of crystal growth, a magnetic levitation positioning gradient heating assembly forms axial constraint through the up-down symmetrical design of a Z-axis coil and a closed magnetic circuit of a magnet yoke, and the vertical position radial constraint of a crucible can be accurately controlled; the X-axis coil and the Y-axis coil ensure that tiny deviation of the crucible in the horizontal direction is corrected in real time through magnetic field force in the left-right direction and the front-back direction, friction or vibration caused by mechanical contact can be avoided, currents of the X-axis coil, the Y-axis coil and the Z-axis coil are independently controlled, three-dimensional space positioning of the crucible can be achieved, complex track movement can be achieved, and therefore different process requirements can be met; meanwhile, due to the arrangement of gradient magnetic field heating, the heating coils on the top layer, the middle layer and the bottom layer can form a temperature gradient, the sensor array can capture the infinitesimal displacement of the crucible in milliseconds, and the coil current is dynamically adjusted through a feedback loop, so that the positioning precision is ensured.

A multi-station crystal growth device, comprising a high-pressure vessel body (1) with flanges at the top and bottom ends, which are integrally formed; a furnace bottom base (17) fixed to the lower part of the high-pressure vessel body (1); at least two crystal furnaces (13) evenly distributed on the furnace bottom base (17) around the central axis of the high-pressure vessel body (1); each crystal furnace (13) is provided with an independent heating and cooling assembly; each crystal furnace (13) is provided with a crucible bracket (16), the bracket is connected to a transmission shaft, the transmission shaft penetrates through the high-pressure vessel bottom plate (26) and is connected to a motor (23), which drives the crucible to rotate; the high-pressure vessel base comprises a high-pressure vessel bottom plate (26) integrally formed with the base flange (21), the base is provided with a transmission shaft channel, the channel is provided with a magnetic fluid sealing structure (24), the base flange (21) bears the high-pressure static seal, and the magnetic fluid sealing structure (24) realizes the dynamic seal of the transmission shaft. The present application realizes the synchronous growth of multiple crystals in a single high-pressure vessel, and improves the efficiency and quality.