9 results about "Crystal oven" patented technology

The invention provides a control method of a crystal furnace integrated with a catcher, and relates to the technical field of crystal furnace control, and the control method comprises the following steps: according to a plurality of surface thermal images, judging whether floating objects exist on the surface of a melt or not; if yes, whether the floating position of the floating object changes or not is judged, if the floating position does not change, the target height and the target area are obtained, the current position of the catcher body is obtained, first target vertical displacement is obtained according to the current position and the target height, and the target rotation angle is obtained according to the current position and the target area; after the trapper body is controlled to rotate around the first rotating shaft by the target rotating angle, the trapper body is controlled to move downwards by the first target vertical displacement, the crystal furnace can flexibly adjust the position and the angle of the trapper to adapt to different crystal growth conditions and floating object distribution conditions, and therefore the floating object trapping efficiency is improved.

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 provides an energy efficiency optimization control method and system for a crystal furnace, and relates to the field of crystal furnaces, and the control method comprises the steps: obtaining the alternating current information of an alternating current and the induced magnetic field information of an induced magnetic field in real time after a first starting signal of an induction heating power supply is received; if the intensity of the induced magnetic field is larger than the first preset intensity, compensation current information is obtained according to the alternating current information, and the compensation current information comprises a compensation current value and a compensation current direction of compensation current; and the compensation current information is sent to the power driving module, so that the compensation current corresponding to the compensation current information is input to the compensation coil. According to the scheme, the compensation current corresponding to the alternating current is input into the compensation coil, interference of the induced magnetic field on the heating magnetic field is effectively offset, it is ensured that the heating magnetic field can stably and intensively act on the crucible, energy loss caused by magnetic field distortion is reduced, and energy consumption optimization is achieved.

The utility model discloses a crystal furnace observation window assembly, and relates to the field of artificial crystal growth, the crystal furnace observation window assembly comprises a first observation window assembly and a second observation window assembly, the front lower part of the first observation window assembly is provided with an inner layer first observation hole, and the rear upper part of the first observation window assembly is provided with an inner layer second observation hole; the front upper end of the second observation window assembly is provided with an outer-layer first observation hole, and the top end is provided with an outer-layer second observation hole; the observation hole is through to form an obliquely upward observation channel for an operator to observe the page state of the seed crystal and the melt; a first window mirror is arranged in the outer-layer second observation hole, and a second window mirror is arranged at the coupling position of the outer-layer first observation hole and the inner-layer second observation hole, so that the external environment temperature is prevented from influencing the temperature in the crystal furnace. According to the utility model, an operator can observe the states of seed crystals and melt liquid level in an upper observation mode when performing inoculation operation, the inoculation operation is convenient, and the influence on the temperature in the furnace chamber of the crystal furnace is small.

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.