公开(公告)号：US20240384433A1

公开(公告)日：2024-11-21

申请号：US18664042

申请日：2024-05-14

Applicant: The University of Hong Kong ,  Dongguan Institute of Opto-electronics, Peking University ,  Southern University of Science and Technology

Inventor： Zhiqin CHU ,  Jixiang Jing ,  Qi WANG ,  Zhongqiang WANG ,  Kwai Hei LI

IPC: C30B28/14 ,  C30B29/04 ,  C30B29/64 ,  C30B33/12 ,  C30B35/00

Abstract: The present invention provides a method for scalable fabrication of ultra-flat polycrystalline diamond membranes, the method comprising: (1) performing chemical vapor deposition on a growth substrate having diamond seeds thereon to grow a polycrystalline diamond membrane, wherein an exposed surface of the polycrystalline diamond membrane is a grown surface having a first roughness; and a surface bonded to the growth substrate is a buried surface; (2) bonding the grown surface to a transfer substrate using an adhesive; and (3) removing the growth substrate to expose the buried surface of the polycrystalline diamond membrane, wherein the buried surface has a second roughness after exposure, and the second roughness is less than the first roughness.

公开(公告)号：US20240240311A1

公开(公告)日：2024-07-18

申请号：US18416325

申请日：2024-01-18

Applicant: Versitech Limited ,  Southern University of Science and Technology ,  Dongguan Institute of Opto-electronics, Peking University

Inventor： Zhiqin CHU ,  Tongtong ZHANG ,  Qi WANG ,  Zhongqiang WANG ,  Kwai Hei LI

IPC: C23C16/44 ,  C23C16/02 ,  C23C16/27 ,  C23C16/511 ,  C23C16/56

CPC classification number: C23C16/4417 ,  C23C16/0227 ,  C23C16/274 ,  C23C16/511 ,  C23C16/56

Abstract: The present invention provides a scalable method for achieving shape control of diamond micro-nanoparticles, comprising air oxidizing diamond micro-nanoparticles grown by chemical vapor deposition and/or diamond micro-nanoparticles grown by high pressure and high temperature. The present invention achieves the controllable morphology transformation of diamond micro-nanoparticles via air oxidation treatment. It has been demonstrated that a series of unique shapes, including “flower” shaped, “hollow” structured, “pyramid” patterned on the surface, and “boomerang” shaped, can be achieved by altering the air oxidation parameters, i.e., temperature and duration. The scalable production of these differently shaped diamond micro-nanoparticles represents a significant scientific breakthrough together with a high commercial value. The ability to produce diamond particles with desired shapes simply and cost-effectively will remove many obstacles to using diamonds for practical applications in nanophotonics, quantum computing, quantum optics, etc.

公开(公告)号：US20240185571A1

公开(公告)日：2024-06-06

申请号：US18396324

申请日：2023-12-26

Applicant: SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Tao YE ,  Qi WANG ,  Jianghan ZHU ,  Shihang WANG ,  Xingbo WANG

IPC: G06V10/77 ,  G06V10/22 ,  G06V10/82

CPC classification number: G06V10/7715 ,  G06V10/22 ,  G06V10/82

Abstract: An image feature extraction method and apparatus are provided, along with a computer device and a readable storage medium. After obtaining the target convolutional kernel of the feature extraction convolutional neural network, this application will cut the input feature map obtained from the preprocessed image according to the preset image size into multiple abutting input feature submaps. Each input feature submap will be zero-padded to obtain the preprocessed feature submap. Then, for each preprocessed feature submap, the Karatsuba algorithm will be used to reduce the multiplier resource consumption during the convolution operation between the target convolutional kernel and the preprocessed feature submap, effectively suppressing the growth of adder resource consumption during the convolution operation, resulting in the output feature submap. Subsequently, multiple output feature submaps will be overlapped and the boundary of the overlapped feature map will be cropped to obtain the output feature map.