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291.发明申请公开(公告)号：US20210347943A1
公开(公告)日：2021-11-11
申请号：US16992115
申请日：2020-08-13
Inventor： Xiaobo LIU , Mingzhen XU , Kun JIA , Lifen TONG
Abstract: A process for producing polyarylene ether nitrile, in which an N-methylpyrrolidone solvent can be efficiently recovered. The process includes the following steps: mixing N-methylpyrrolidone, potassium carbonate, 2,6-dichlorobenzonitrile, dihydric phenol and toluene, and carrying out a dehydration reaction and a polymerization reaction in sequence to obtain a high-viscosity polyarylene ether nitrile solution; then pelletizing and conveying polyarylene ether nitrile particles together with methanol to a primary vibrating screen to complete a primary replacement of N-methylpyrrolidone; then using a secondary vibrating screen to complete a secondary replacement of the solvent; subsequently, grinding the polyarylene ether nitrile particles and carrying out an extraction with methanol, and then centrifuging, washing with water and drying to obtain purified polyarylene ether nitrile powder; and finally distilling replacement liquid and centrifugation liquid to separate methanol from N-methylpyrrolidone.
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公开(公告)号：US20210336052A1
公开(公告)日：2021-10-28
申请号：US17005354
申请日：2020-08-28
Inventor： Ming QIAO , Zhengkang WANG , Shida DONG , Bo ZHANG
IPC: H01L29/78 , H01L21/8234 , H01L29/66 , H01L29/423
Abstract: A power MOS device with low gate charge and a method for manufacturing the same. The device includes an M-shaped gate structure, which reduces the overlapped area between control gate electrode and split gate electrode. A low-k material is introduced to reduce dielectric constant of the isolation medium material. The combination of the M-shaped gate structure and low-k material can reduce parasitic capacitance Cgs of the device, thereby increasing switching speed and reducing switching losses.
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公开(公告)号：US20210320596A1
公开(公告)日：2021-10-14
申请号：US17153833
申请日：2021-01-20
Inventor： Yuanjie SU , Qichen GONG , Guangzhong XIE , Mingliang YAO , Chunxu CHEN , Jinyang YI , Li JIA , Weizhi LI , Huiling TAI , Xiaosong DU , Yadong JIANG
Abstract: A self-powered automobile exhaust gas sensor including a supporting frame, a ferroelectric-triboelectric coupling functional film, and two metal electrodes. The ferroelectric-triboelectric coupling functional film comprises a first end fixed on the supporting beam in middle of the supporting frame, and a second end is freestanding. The two metal electrodes are grounded and adhered on the upper and lower sides of the supporting frame, respectively. An iron block is mounted on the top of the supporting frame. The ferroelectric-triboelectric coupling functional film includes a negative triboelectric charging layer, a ferroelectric composite material layer and a positive triboelectric charging layer; the ferroelectric composite material layer is prepared via casting method by mixing the ferroelectric material and the gas-sensitive material; the negative triboelectric charging layer has stronger electron affinity ability than the positive triboelectric charging layer, and attracts electrons from the positive triboelectric charging layer.
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公开(公告)号：US20210273095A1
公开(公告)日：2021-09-02
申请号：US16877516
申请日：2020-05-19
Inventor： Ming QIAO , Longfei LIANG , Yilei LYU , Zhao QI , Bo Zhang
Abstract: A low specific on-resistance (Ron,sp) power semiconductor device includes a power device and a transient voltage suppressor (TVS); wherein the power device comprises a gate electrode, a drain electrode, a bulk electrode, a source electrode and a parasitic body diode, the bulk electrode and the source electrode are shorted, the TVS comprises an anode electrode and a cathode electrode, the drain electrode of the power device and the anode electrode of the TVS are connected by a first metal to form a high-voltage terminal electrode, the source electrode of the power device and the cathode electrode of the TVS are connected by a second metal to form a low-voltage terminal electrode.
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公开(公告)号：US20210270674A1
公开(公告)日：2021-09-02
申请号：US17326313
申请日：2021-05-20
Inventor： Chao Wang , Jing Jiang , Anmei Qiu , Yekui Zhong , Yi Niu , Peifeng Yu , Zezhan Zhang , Ying Duan , Xueke Gou , Guiyun Tian
Abstract: A device for measuring surface temperature of a turbine blade based on a rotatable prism includes a probe, a prism rotating apparatus and an optical focusing apparatus. The prism rotating apparatus and the optical focusing apparatus are located inside the probe. The probe includes a probe outer casing, a probe inner casing, a water-cooled casing pipe, a sapphire window piece, a quartz prism, a light pipe, a collimating lens, a focusing lens and an infrared array detector. The prism rotating apparatus includes a rotary motor, a worm, a gear and a prism rotary table, the rotary motor rotates to drive the prism rotary table to rotate. The optical focusing apparatus includes a telescopic motor, a coupler, a lead screw and a drive rod, the telescopic motor rotates to drive the lead screw, so as to further drive the drive rod to move along the slot.
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Patent Agency Ranking
公开(公告)号：US20210217901A1
公开(公告)日：2021-07-15
申请号：US17078109
申请日：2020-10-23
Inventor： Yong ZHANG , Chengkai WU , Han WANG , Haomiao WEI , Ruimin XU , Bo YAN
IPC: H01L29/872 , H01L29/66
Abstract: A double Schottky-barrier diode includes a semi-insulating substrate, a left mesa formed by growth and etching on the semi-insulating substrate, a middle mesa formed by growth and etching on the semi-insulating substrate, a right mesa formed by growth and etching on the semi-insulating substrate, two anode probes and two air-bridge fingers. The two Schottky contacts are closely fabricated on the same mesa (middle mesa) in a back-to-back manner to obtain even symmetric C-V characteristics and odd symmetric I-V characteristics from the device level. The output of a frequency multiplier fabricated using the double Schottky-barrier diode only has odd harmonics, but no even harmonics, which is suitable for the production of high-order frequency multipliers. The cathodes of the two Schottky contacts are connected by the buffer layer without ohmic contact.
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公开(公告)号：US20210208121A1
公开(公告)日：2021-07-08
申请号：US17120239
申请日：2020-12-13
Inventor： Yuanjie SU , Qichen GONG , Yanmeng CHEN , Guangzhong XIE , Huiling TAI , Xiaosong DU , Yadong JIANG
IPC: G01N33/00
Abstract: The disclosure relates to a wireless self-powered gas sensor based on electromagnetic oscillations triggered by external forces and its fabrication method. The sensor includes a gas test chamber, a first friction layer, a second friction layer, an interdigital electrode, a gas-sensitive material, an air inlet, an air outlet and leads. The gas sensor of the disclosure is an integrated detection system of “environmental energy collection—wireless energy transmission—active spontaneous detection” that can be driven simultaneously only by external mechanical movement, and can work independently without external power supply. The first friction layer and the second friction layer are arranged outside the gas test chamber. The frictional motion will not interfere with the flow field of the test chamber and the gas molecule absorption and desorption, which ensures the stability of gas detection to the greatest extent.
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公开(公告)号：US11036978B2
公开(公告)日：2021-06-15
申请号：US16370202
申请日：2019-03-29
Inventor： Chun Yin , Yuhua Cheng , Ting Xue , Xuegang Huang , Haonan Zhang , Kai Chen , Anhua Shi
Abstract: The present invention provides a method for separating out a defect image from a thermogram sequence based on weighted naive Bayesian classifier and dynamic multi-objective optimization, we find that different kinds of TTRs have big differences in some physical quantities. The present invention extracts these features (physical quantities) and classifies the selected TTRs into K categories based on their feature vectors through a weighted naive Bayesian classifier, which deeply digs the physical meanings contained in each TTR, makes the classification of TTRs more rational, and improves the accuracy of defect image's separation. Meanwhile, the multi-objective function does not only fully consider the similarities between the RTTR and other TTRs in the same category, but also considers the dissimilarities between the RTTR and the TTRs in other categories, thus the RTTR selected is more representative, which guarantees the accuracy of describing the defect outline. And the initial TTR population corresponding to the approximate solution for multi-objective optimization is chosen according to the previous TTR populations, which makes the multi-objective optimization dynamic and reduces its time consumption.
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299.发明申请公开(公告)号：US20210143014A1
公开(公告)日：2021-05-13
申请号：US16618354
申请日：2019-03-22
Inventor： Chao Wang , Ying Duan , Jing Jiang , Jun Hu , Zezhan Zhang , Yang Yang , Xueke Gou , Congjun Wu
Abstract: The present invention designs a measurement scheme for the longitudinal temperature of the film during nitride epitaxial growth, belongs to the field of semiconductor measurement technology. Epitaxial growth technology is one of the most effective methods for preparing nitride materials. The temperature during the growth process restricts the performance of the device. The non-contact temperature measurement method is generally used to measure the temperature of the graphite disk as the base, which can't obtain the longitudinal temperature. The present invention respectively measures the surface temperature of the epitaxial layer and the temperature of the graphite disk by ultraviolet and infrared radiation temperature measurement technologies, and then uses the finite element simulation method to perform thermal field analysis from the bottom surface of the substrate to the surface of the epitaxial layer, so that the longitudinal temperature is obtained, thereby providing a favorable basis for temperature regulation during nitride growth.
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公开(公告)号：US10985470B2
公开(公告)日：2021-04-20
申请号：US16386296
申请日：2019-04-17
Inventor： Yujian Cheng , Yafei Wu , Jinfan Zhang , Fan Zhao , Chunxu Bai , Yong Fan , Kaijun Song , Bo Zhang , Xianqi Lin , Yonghong Zhang
Abstract: A slot array antenna including a smooth curved surface and planar feed structures which are respectively disposed at two ends of the smooth curved surface and are tangent to the smooth curved surface. The smooth curved surface includes at least two arcs mutually connected by smooth transition. The at least two arcs each includes an upper copper metal layer, a lower copper metal layer, and a dielectric substrate layer between the upper and lower copper metal layers. The upper copper metal layer includes radiating slots, and the adjacent radiating slots in a linear array have opposite offsets along the center line of the slot array antenna. The dielectric substrate layer includes metallic vias symmetrically arranged on both sides of the central line of the antenna to form a substrate integrated waveguide.
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