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99results about How to "Compact size" patented technology

Light emitting diode (LED) based on silicon substrate through hole technology flip chip and manufacturing process of LED

ActiveCN102769086AUniform fluorescent layerCompact sizeSemiconductor devicesThrough-hole technologyWafer-level packaging
The invention relates to a light emitting diode (LED) based on a silicon substrate through hole technology flip chip and a manufacturing process of the LED. The LED provided by the invention comprises a fluorescent layer, an n-type current expansion layer, a luminous layer, a p-type current expansion layer, a metal light reflecting layer, a p-type electrode bonding pad, a metal through hole, an insulating layer, an n-type electrode bonding pad, a silicon substrate circuit layer, a silicon substrate insulating layer, a silicon substrate, a silicon substrate negative electrode, a silicon substrate negative electrode metal through hole, a silicon substrate positive electrode metal through hole, a silicon substrate positive electrode bonding pad, a silicon substrate through hole insulating layer and a chip sapphire substrate. Aiming at the structural defects existing in the current high-power LED, the invention provides the LED based on the silicon substrate through hole technology flip chip and the manufacturing process of the LED, through hole electrodes are respectively manufactured on a flip LED chip and a silicon substrate through an etching technology or a laser technology, and co-crystallization welding is carried out so that packaging is finished. An LED device provided by the invention is free of gold wire bonding, and the technology is beneficial to the development of large-scale wafer level packaging and is used for improving the heat dissipation performance by through holes as well as improving the reliability in packaging an LED chip.
Owner:SHANGHAI UNIV

Mouse cage elastic support bearing cavity structure

The invention relates to a mouse cage elastic support bearing cavity structure. The mouse cage elastic support bearing cavity structure comprises a shell provided with an oil inlet pipe, and a returntype mouse cage elastic support, a contact type end face sealing device, sliding oil seal grate teeth, a graphite ring, a bearing, a clamping ring, a rotating shaft and the like that are arranged in the shell; the return type mouse cage elastic support is installed in a ring groove of the shell, and the inner ring of the shell is provided with a plurality of small holes uniformly distributed in the circumference; and the contact end face sealing device is hermetically arranged at one end of the bearing cavity structure. In the working state, high-pressure lubricating oil enters the bearing cavity through the oil inlet pipe arranged on the shell, the contact-type end face sealing device and the bearing are sequentially cooled according to a preset flow path, and the cooled lubricating oil is discharged out of the bearing cavity through the small holes arranged in the inner ring of the shell, the bearing cavity is filled with lubricating oil under the throttling effect of the small holes, positive pressure of 0.6-0.7 MPa is formed, and therefore, the pressure condition of normal working of the contact type end face seal is met, the external high-temperature gas is isolated, and the normal working of the bearing cavity is ensured.
Owner:XIAN AEROSPACE PROPULSION INST

Light polarization beam splitter

The invention discloses a light polarization beam splitter. The light polarization beam splitter comprises an orientation coupler. The narrow waveguide of the orientation coupler receives an input light source and outputs TE0 light in the input light source, couples TM0 light in the input light source to wide waveguide and converts the TM0 light into TM1 light. The output end of the wide waveguide is connected with a first MMI coupler, and the first MMI coupler divides the input TM1 light into two beams of TM0 polarized light, wherein the two beams of TM0 polarized light are the same in power, and the phase difference of the two beams of TM0 polarized light is 180 degrees. The two output ends of the first MMI coupler are respectively connected with the input end of a second MMI coupler through a 90-degree phase shifter. One output end of the second MMI coupler serves as a TM0 polarized light output port. The equation of the length of the first MMI coupler is shown in the specification, and Lpi1 represents the beat length of the first MMI coupler. The second MMI coupler is an interference coupler. According to the light polarization beam splitter, a high-capacity monolithic integration chip can be achieved, and the light polarization beam splitter has the advantages that the bandwidth is very large, the extinction ratio is very high, and the loss is very low.
Owner:PEKING UNIV

Double-frequency three-order band-pass filter based on microstrip ridge gap waveguide

ActiveCN111244587AEasy to control independentlyCompact sizeResonatorsFrequency bandCoplanar waveguide
The invention belongs to the technical field of microwave devices, and discloses a double-frequency three-order band-pass filter based on microstrip ridge gap waveguides. A metal floor is arranged onthe upper surface of an upper dielectric plate, metalized via holes are embedded in the two sides and the middle of the dielectric plate respectively, and a grounded coplanar waveguide-microstrip gapwaveguide transition structure is loaded on the lower surface of the dielectric plate. A metal ridge is loaded on the upper surface of the lower dielectric plate, mushroom-shaped EBG structures are loaded at the two sides of the metal ridge, and a metal floor is arranged on the lower surface of the lower dielectric plate. Three microstrip ridge gap waveguide dual-mode resonators are embedded in the metal ridge, and two sections of metal ridges are loaded between the microstrip ridge gap waveguide dual-mode resonators on the upper surface of the lower dielectric plate and are of a coupling structure. According to the invention, the double-frequency three-order band-pass filter is realized, the double-frequency filter is compact in structure, and the frequencies of the two passbands are easyto control independently. The double-frequency band-pass filter based on the microstrip ridge gap waveguide is realized for the first time, so that the application of the microstrip ridge gap waveguide is wider.
Owner:XIDIAN UNIV
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