Patents by Inventor Xiaozhou CHE
Xiaozhou CHE has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11721566Abstract: Methods and systems for monitoring film thickness using a sensor assembly include a process chamber having a chamber body, a substrate support disposed in the chamber body, a lid disposed over the chamber body, and a sensor assembly coupled to the chamber body at a lower portion of the sensor assembly. The sensor assembly is coupled to the lid at an upper portion of the sensor assembly. The sensor assembly includes one or more apertures disposed through one or more sides of the sensor assembly, and the one or more sensors are disposed in the sensor assembly through the one or more of the apertures.Type: GrantFiled: July 13, 2021Date of Patent: August 8, 2023Assignee: Applied Materials, Inc.Inventors: Xiaozhou Che, Graeme Jamieson Scott, Richard Gustav Hagborg, Alan H. Ouye, Nelson A. Yee
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Publication number: 20230042777Abstract: One or more embodiments described herein generally relate to methods and systems for forming films on substrates in semiconductor processes. In embodiments described herein, a process system includes different materials each contained in separate ampoules. Each material is flowed into a separate portion of a showerhead contained within a process chamber via a heated gas line. From the showerhead, each material is flowed on to a substrate that sits on the surface of a rotating pedestal. Controlling the mass flow rate out of the showerhead and the rotation rate of the pedestal helps result in films with desirable material domain sizes to be deposited on the substrate.Type: ApplicationFiled: October 24, 2022Publication date: February 9, 2023Inventors: Alexander N. LERNER, Roey SHAVIV, Prashanth KOTHNUR, Satish RADHAKRISHNAN, Xiaozhou CHE
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Patent number: 11572618Abstract: A method of depositing a backside film layer on a backside of a substrate includes loading a substrate having one or more films deposited on a front side of the substrate onto a substrate support of a processing chamber, depositing, from the sputter target, a target material on the backside of the substrate to form a backside layer on the backside of the substrate, and applying an RF bias to an electrode disposed within the substrate support while depositing the target material. The front side of the substrate faces the substrate support and is spaced from a top surface of the substrate support, and a backside of the substrate faces a sputter target of the processing chamber.Type: GrantFiled: August 26, 2020Date of Patent: February 7, 2023Assignee: APPLIED MATERIALS, INC.Inventors: Jothilingam Ramalingam, Xiaozhou Che, Yong Cao, Shane Lavan, Chunming Zhou
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Publication number: 20230018891Abstract: One or more embodiments described herein generally relate to methods and systems for monitoring film thickness using a sensor assembly. In embodiments described herein, a process chamber having a chamber body, a substrate support disposed in the chamber body, a lid disposed over the chamber body, and a sensor assembly coupled to the chamber body at a lower portion of the sensor assembly. The sensor assembly is coupled to the lid at an upper portion of the sensor assembly. The sensor assembly includes one or more apertures disposed through one or more sides of the sensor assembly, and the one or more sensors are disposed in the sensor assembly through the one or more of the apertures.Type: ApplicationFiled: July 13, 2021Publication date: January 19, 2023Inventors: Xiaozhou CHE, Graeme Jamieson SCOTT, Richard Gustav HAGBORG, Alan H. OUYE, Nelson A. YEE
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Patent number: 11505863Abstract: Methods and systems for forming films on substrates in semiconductor processes are disclosed. The method includes providing different materials each contained in separate ampoules. Material is flowed from each ampoule into a separate portion of a showerhead contained within a process chamber via a heated gas line. From the showerhead, each material is flowed on to a substrate that sits on the surface of a rotating pedestal. Controlling the mass flow rate out of the showerhead and the rotation rate of the pedestal helps result in films with desirable material domain sizes to be deposited on the substrate.Type: GrantFiled: April 21, 2020Date of Patent: November 22, 2022Assignee: Applied Materials, Inc.Inventors: Alexander N. Lerner, Roey Shaviv, Prashanth Kothnur, Satish Radhakrishnan, Xiaozhou Che
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Patent number: 11251386Abstract: A highly efficient multi junction photovoltaic device, such as a two, three, or four junction device, is disclosed. The multi-junction device may include a first subcell comprising a first photoactive region and a second subcell comprising a second photoactive region. The first and second photoactive regions are designed to minimize spectral overlap and maximize photocurrent across a broad absorption spectra, such as wavelengths ranging from 400 nm to 900 nm. The device may further include an inter-connecting layer, disposed between the first subcell and the second subcell, that is at least substantially transparent. By introducing a transparent interconnecting layer, a dual element (tandem) cell achieves a power conversion efficiency of 10.0±0.5%. By adding an additional (3rd) sub-cell that absorbs at the second order optical interference maximum within the stack. The triple junction cell significantly improves the quantum efficiency at shorter wavelengths, achieving a power conversion efficiency of 11.1±0.Type: GrantFiled: April 6, 2015Date of Patent: February 15, 2022Assignee: The Regents of the University of MichiganInventors: Xiaozhou Che, Xin Xiao, Stephen R. Forrest
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Patent number: 11145834Abstract: High efficiency multi-junction small-molecule organic photovoltaic devices and methods of fabricating the same are disclosed herein. Design considerations for improving spectral coverage and light-harvesting efficiency using the multi-junction devices are also disclosed.Type: GrantFiled: January 15, 2015Date of Patent: October 12, 2021Assignee: The Regents of the University of MichiganInventors: Stephen R. Forrest, Xiaozhou Che, Xin Xiao
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Patent number: 11094902Abstract: A high efficiency small molecule tandem solar cell is disclosed. The tandem cell may include a first subcell comprising a first photoactive region and a second subcell comprising a second photoactive region. The first and second photoactive regions are designed to minimize spectral overlap and maximize photocurrent. The device may further include an interconnecting layer, disposed between the first subcell and the second subcell, that is at least substantially transparent.Type: GrantFiled: October 27, 2014Date of Patent: August 17, 2021Assignee: The Regents of the University of MichiganInventors: Stephen R. Forrest, Xiaozhou Che, Xin Xiao
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Publication number: 20210062325Abstract: A method of depositing a backside film layer on a backside of a substrate includes loading a substrate having one or more films deposited on a front side of the substrate onto a substrate support of a processing chamber, depositing, from the sputter target, a target material on the backside of the substrate to form a backside layer on the backside of the substrate, and applying an RF bias to an electrode disposed within the substrate support while depositing the target material. The front side of the substrate faces the substrate support and is spaced from a top surface of the substrate support, and a backside of the substrate faces a sputter target of the processing chamber.Type: ApplicationFiled: August 26, 2020Publication date: March 4, 2021Inventors: Jothilingam RAMALINGAM, Xiaozhou CHE, Yong CAO, Shane LAVAN, Chunming ZHOU
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Publication number: 20210057661Abstract: Organic photovoltaic cells (OPVs) and their compositions are described herein. In one or more embodiments, the OPV or solar cell includes an anode; a cathode; a first active layer positioned between the anode and the cathode, the first active layer configured to absorb light in a first wavelength spectrum; a second active layer positioned between the anode and the cathode, the second active layer configured to absorb light in a second wavelength spectrum; and a recombination zone positioned between the first active layer and the second active layer.Type: ApplicationFiled: January 17, 2019Publication date: February 25, 2021Inventors: Stephen R. Forrest, Xiaozhou Che, Yongxi Li
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Publication number: 20210020697Abstract: An organic optoelectronic device comprises a first electrode, a first infrared photovoltaic subcell positioned over the first electrode, a second infrared photovoltaic subcell positioned over the first near-infrared subcell, and a first visible photovoltaic subcell positioned over the second near-infrared subcell, a second electrode positioned between the second near-infrared photovoltaic subcell and the first visible photovoltaic subcell, and a third electrode positioned over the first visible photovoltaic subcell, wherein the first electrode and the third electrode are held at the same potential relative to the second electrode.Type: ApplicationFiled: July 17, 2020Publication date: January 21, 2021Inventors: Stephen R. Forrest, Xiaozhou Che, Yongxi Li
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Publication number: 20200378000Abstract: One or more embodiments described herein generally relate to methods and systems for forming films on substrates in semiconductor processes. In embodiments described herein, a process system includes different materials each contained in separate ampoules. Each material is flowed into a separate portion of a showerhead contained within a process chamber via a heated gas line. From the showerhead, each material is flowed on to a substrate that sits on the surface of a rotating pedestal. Controlling the mass flow rate out of the showerhead and the rotation rate of the pedestal helps result in films with desirable material domain sizes to be deposited on the substrate.Type: ApplicationFiled: April 21, 2020Publication date: December 3, 2020Inventors: Alexander N. Lerner, Roey Shaviv, Prashanth Kothnur, Satish Radhakrishnan, Xiaozhou Che
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Publication number: 20170005284Abstract: A highly efficient multi junction photovoltaic device, such as a two, three, or four junction device, is disclosed. The multi-junction device may include a first subcell comprising a first photoactive region and a second subcell comprising a second photoactive region. The first and second photoactive regions are designed to minimize spectral overlap and maximize photocurrent across a broad absorption spectra, such as wavelengths ranging from 400 nm to 900 nm. The device may further include an inter-connecting layer, disposed between the first subcell and the second subcell, that is at least substantially transparent. By introducing a transparent interconnecting layer, a dual element (tandem) cell achieves a power conversion efficiency of 10.0±0.5%. By adding an additional (3rd) sub-cell that absorbs at the second order optical interference maximum within the stack. The triple junction cell significantly improves the quantum efficiency at shorter wavelengths, achieving a power conversion efficiency of 11.1±0.Type: ApplicationFiled: April 6, 2015Publication date: January 5, 2017Inventors: Xiaozhou Che, Xin Xiao, Stephen R. Forrest
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Publication number: 20160343966Abstract: High efficiency multi-junction small-molecule organic photovoltaic devices and methods of fabricating the same are disclosed herein. Design considerations for improving spectral coverage and light-harvesting efficiency using the multi-junction devices are also disclosed.Type: ApplicationFiled: January 15, 2015Publication date: November 24, 2016Inventors: Stephen R. Forrest, Xiaozhou Che, Xin Xiao
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Publication number: 20160254470Abstract: A high efficiency small molecule tandem solar cell is disclosed. The tandem cell may include a first subcell comprising a first photoactive region and a second subcell comprising a second photoactive region. The first and second photoactive regions are designed to minimize spectral overlap and maximize photocurrent. The device may further include an interconnecting layer, disposed between the first subcell and the second subcell, that is at least substantially transparent.Type: ApplicationFiled: October 27, 2014Publication date: September 1, 2016Inventors: Stephen R. Forrest, Xiaozhou Che, Xin Xiao, Jeramy Zimmerman
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Publication number: 20160254101Abstract: Disclosed herein are organic photosensitive devices including a first subcell and a second subcell and having at least one exciton-blocking charge carrier filter disposed between the subcells. The filters comprise a mixture of at least one wide energy gap material and at least one electron or hole conducting material. As described herein, the filters simultaneously block excitons and conduct the desired charge carrier (electrons or holes).Type: ApplicationFiled: October 27, 2014Publication date: September 1, 2016Inventors: Stephen R. FORREST, Xin XIAO, Kevin BERGEMANN, Anurag PANDA, Jeramy D. ZIMMERMAN, Brian E. LASSITER, Mark E. THOMPSON, Andrew N. BARTYNSKI, Cong THINH, Xiaozhou CHE