公开(公告)号：US20250149339A1

公开(公告)日：2025-05-08

申请号：US18398558

申请日：2023-12-28

Applicant: BEIJING SUPERSTRING ACADEMY OF MEMORY TECHNOLOGY ,  INSTITUTE OF MICROELECTRONICS, CHINESE ACADEMY OF SCIENCES

Inventor： Jianfeng Gao ,  Shuai Yang ,  Jinbiao Liu ,  Weibing Liu ,  Junfeng Li ,  Jun Luo ,  Jinjuan Xiang

IPC: H01L21/225 ,  H01L21/02

Abstract: A conformal boron doping method for a three-dimensional structure includes the steps of: removing a natural oxide layer on a surface of a silicon-based three-dimensional substrate; forming a buffer layer on the surface of the silicon-based three-dimensional substrate; forming a boron oxide thin film on the alumina buffer layer; covering a passivation layer on a surface of the boron oxide thin film; and driving boron impurities containing boron oxide into the silicon-based three-dimensional substrate through the buffer layer by using laser or rapid annealing, to dope the silicon-based three-dimensional substrate. Selecting suitable boron source precursors and oxidants solves the problems of difficult nucleation and inability to form a film after reaching a certain thickness for boron oxide. By selecting alumina as the passivation layer, it is possible to protect the boron oxide thin film from being damaged, and thus achieve damage-free diffusion doping during laser or rapid annealing processes.

公开(公告)号：US10157956B2

公开(公告)日：2018-12-18

申请号：US15477191

申请日：2017-04-03

Applicant: INSTITUTE OF MICROELECTRONICS, CHINESE ACADEMY OF SCIENCES

Inventor： Hushan Cui ,  Jinjuan Xiang ,  Xiaobin He ,  Tao Yang ,  Junfeng Li ,  Chao Zhao

IPC: H01L21/00 ,  H01L27/146 ,  H01L31/0216 ,  H01L31/0232

Abstract: A method for monolithic integration of a hyperspectral image sensor is provided, which includes: forming a bottom reflecting layer on a surface of the photosensitive region of a CMOS image sensor wafer; forming a transparent cavity layer composed of N step structures on the bottom reflecting layer through area selective atomic layer deposition processes, where N=2m, m≥1 and m is a positive integer; and forming a top reflecting layer on the transparent cavity layer. With the method, non-uniformity accumulation due to etching processes in conventional technology is minimized, and the cavity layer can be made of materials which cannot be etched. Mosaic cavity layers having such repeated structures with different heights can be formed by extending one-dimensional ASALD, such as extending in another dimension and forming repeated regions, which can be applied to snapshot hyperspectral image sensors, for example, pixels, and greatly improving performance thereof.

公开(公告)号：US10312345B2

公开(公告)日：2019-06-04

申请号：US15871690

申请日：2018-01-15

Applicant: INSTITUTE OF MICROELECTRONICS, CHINESE ACADEMY OF SCIENCES

Inventor： Jinjuan Xiang ,  Xiaolei Wang ,  Hong Yang ,  Shi Liu ,  Junfeng Li ,  Wenwu Wang ,  Chao Zhao

IPC: H01L21/3205 ,  H01L29/66 ,  H01L21/265 ,  H01L29/49

Abstract: The present disclosure provides a method for manufacturing a transistor having a gate with a variable work function, comprising: providing a semiconductor substrate; forming a dummy gate stack on the semiconductor substrate and performing ion implantation on an exposed area of the semiconductor substrate at both sides of the dummy gate stack to form source/drain regions; removing the dummy gate and annealing the source/drain regions; providing an atomic layer deposition reaction device; introducing a precursor source reactant into the atomic layer deposition reaction device; and controlling an environmental factor for the atomic layer deposition device to grow a work function metal layer. The present disclosure also provides a transistor having a gate with a variable work function. The present disclosure may adjust a variable work function, and may use the same material system to obtain an adjustable threshold voltage within an adjustable range.

公开(公告)号：US09954071B2

公开(公告)日：2018-04-24

申请号：US15174720

申请日：2016-06-06

Applicant: INSTITUTE OF MICROELECTRONICS, CHINESE ACADEMY OF SCIENCES ,  Jiangnan University

Inventor： Yuqiang Ding ,  Chao Zhao ,  Jinjuan Xiang

IPC: C23C16/00 ,  H01L29/49 ,  C23C16/02 ,  C23C16/08 ,  C23C16/18 ,  C23C16/455 ,  H01L21/28 ,  H01L29/40 ,  H01L29/66 ,  H01L29/51

CPC classification number: H01L29/4966 ,  C23C16/0209 ,  C23C16/08 ,  C23C16/18 ,  C23C16/45527 ,  H01L21/28088 ,  H01L29/401 ,  H01L29/513 ,  H01L29/517 ,  H01L29/66545

Abstract: A method for preparing a TiAl alloy thin film, wherein a reaction chamber is provided, in which at least one substrate is placed; an aluminum precursor and a titanium precursor are introduced into the reaction chamber, wherein the aluminum precursor has a molecular structure of a structural formula (I); and the aluminum precursor and the titanium precursor are brought into contact with the substrate so that a titanium-aluminum alloy thin film is formed on the surface of the substrate by vapor deposition. The method solves the problem of poor step coverage ability and the problem of incomplete filling with regard to the small-size devices by the conventional methods. Meanwhile, the formation of titanium-aluminum alloy thin films with the aid of plasma is avoided so that the substrate is not damaged by plasma.