Patents by Inventor Haó-Yu CHANG
Haó-Yu CHANG 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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Publication number: 20240153842Abstract: A semiconductor structure includes a die embedded in a molding material, the die having die connectors on a first side; a first redistribution structure at the first side of the die, the first redistribution structure being electrically coupled to the die through the die connectors; a second redistribution structure at a second side of the die opposing the first side; and a thermally conductive material in the second redistribution structure, the die being interposed between the thermally conductive material and the first redistribution structure, the thermally conductive material extending through the second redistribution structure, and the thermally conductive material being electrically isolated.Type: ApplicationFiled: January 4, 2024Publication date: May 9, 2024Inventors: Hao-Jan Pei, Wei-Yu Chen, Chia-Shen Cheng, Chih-Chiang Tsao, Cheng-Ting Chen, Chia-Lun Chang, Chih-Wei Lin, Hsiu-Jen Lin, Ching-Hua Hsieh, Chung-Shi Liu
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Publication number: 20240055525Abstract: A method of forming a semiconductor device includes forming a dummy gate structure across a fin protruding from a substrate, forming gate spacers on opposite sidewalls of the dummy gate structure, forming source/drain epitaxial structures on opposite sides of the dummy gate structure, forming a first interlayer dielectric (ILD) layer on the source/drain epitaxial structures and outer sidewalls of the gate spacers, replacing the dummy gate structure with a replacement gate structure, etching back the replacement gate structure to form a first recess between the gate spacers, forming a source/drain contact in the first ILD layer, and forming a second interlayer dielectric (ILD) layer to fill in the first recess between the gate spacers and over the source/drain contact.Type: ApplicationFiled: August 11, 2022Publication date: February 15, 2024Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventors: Yu-Lien HUANG, Tze-Liang LEE, Jr-Hung LI, Chi-Hao CHANG, Hao-Yu CHANG, Pei-Yu CHOU
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Publication number: 20230282750Abstract: Methods of forming improved dielectric layers and semiconductor devices formed by the same are disclosed. In an embodiment, a semiconductor device includes a transistor structure on a semiconductor substrate; a first dielectric layer on the transistor structure; a second dielectric layer on the first dielectric layer, the second dielectric layer having a nitrogen concentration greater than a nitrogen concentration of the first dielectric layer; a first conductive structure extending through the second dielectric layer and the first dielectric layer, the first conductive structure being electrically coupled to a first source/drain region of the transistor structure, a top surface of the first conductive structure being level with a top surface of the second dielectric layer; and a second conductive structure physically and electrically coupled to the first conductive structure, a bottom surface of the second conductive structure being a first distance below the top surface of the second dielectric layer.Type: ApplicationFiled: June 15, 2022Publication date: September 7, 2023Inventors: Yu-Lien Huang, Tze-Liang Lee, Jr-Hung Li, Chi-Hao Chang, Hao-Yu Chang, Pei-Yu Chou
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Patent number: 8912744Abstract: A method and apparatus for dynamically adjusting a dead time of a BLDC motor during a phase change detect the winding current of the BLDC motor during the dead time, and terminate the dead time when the winding current is detected to be substantially or close to zero. Thus, the method and apparatus can optimize the dead time and switch the BLDC motor between two phases at a zero-current point, without reducing the maximum rotation speed of the BLDC motor.Type: GrantFiled: August 9, 2012Date of Patent: December 16, 2014Assignee: Richtek Technology Corp.Inventors: Haó-Yu Chang, Pei-Cheng Huang, Wei-Hsu Chang, Kuo-Chung Lee
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Patent number: 8487571Abstract: A zero-crossing detection circuit and a commutation device using the zero-crossing detection circuit are provided. The zero-crossing detection circuit is adapted into a three-phase brushless DC (direct current) motor with first to third coils. One terminal of each of the first to third coils is electrically coupled together with each other. The detection circuit comprises a first selection circuit, a second selection circuit and a comparator. The first selection circuit and the second selection circuit are both electrically coupled to another terminals of the first to third coils, to obtain first to third terminal voltages, and output one of the first to third terminal voltages according to a selection signal. The comparator is configured for comparing an output of the first selection circuit and an output of the second selection circuit, to output a comparing result.Type: GrantFiled: September 14, 2011Date of Patent: July 16, 2013Assignee: Richtek Technology Corp.Inventors: Wei-Hsu Chang, Pei-Cheng Huang, Hao-Yu Chang, Yen-Shin Lai, Kuo-Chung Lee, Jo-Yu Wang, Yu-Kuang Wu, Chih-Chang Chen, Shiue-Shr Jiang, Jen-Hung Chi
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Publication number: 20130038260Abstract: A method and apparatus for dynamically adjusting a dead time of a BLDC motor during a phase change detect the winding current of the BLDC motor during the dead time, and terminate the dead time when the winding current is detected to be substantially or close to zero. Thus, the method and apparatus can optimize the dead time and switch the BLDC motor between two phases at a zero-current point, without reducing the maximum rotation speed of the BLDC motor.Type: ApplicationFiled: August 9, 2012Publication date: February 14, 2013Applicant: RICHTEK TECHNOLOGY CORPORATIONInventors: Haó-Yu CHANG, Pei-Cheng HUANG, Wei-Hsu CHANG, Kuo-Chung LEE
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Publication number: 20120326647Abstract: A zero-crossing detection circuit and a commutation device using the zero-crossing detection circuit are provided. The zero-crossing detection circuit is adapted into a three-phase brushless DC (direct current) motor with first to third coils. One terminal of each of the first to third coils is electrically coupled together with each other. The detection circuit comprises a first selection circuit, a second selection circuit and a comparator. The first selection circuit and the second selection circuit are both electrically coupled to another terminals of the first to third coils, to obtain first to third terminal voltages, and output one of the first to third terminal voltages according to a selection signal. The comparator is configured for comparing an output of the first selection circuit and an output of the second selection circuit, to output a comparing result.Type: ApplicationFiled: September 14, 2011Publication date: December 27, 2012Applicant: RICHTEK TECHNOLOGY CORPInventors: Wei-Hsu Chang, Pei-Cheng Huang, Hao-Yu Chang, Yen-Shin Lai, Kuo-Chung Lee, Jo-Yu Wang, Yu-Kuang Wu, Chih-Chang Chen, Shiue-Shr Jiang, Jen-Hung Chi
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Patent number: 8054439Abstract: A method for fabricating a liquid crystal display (LCD) is provided. The method includes the steps stated below. At first, providing an LCD panel including a first substrate, a second substrate and a liquid crystal layer therebetween. The liquid crystal layer includes several photo-sensitive monomers and several liquid crystal molecules. The LCD panel has at least a first pixel and a second pixel. Afterwards, correspondingly driving the first pixel and the second pixel by the first voltage and the second voltage. At last, applying a ultra-violet source onto the LCD panel to enable several photo-sensitive monomers to polymerize several alignment polymers on the first substrate and the second substrate.Type: GrantFiled: October 21, 2009Date of Patent: November 8, 2011Assignee: AU Optronics Corp.Inventor: Hao-Yu Chang
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Patent number: 7728934Abstract: A method for fabricating a liquid crystal display (LCD) is provided. The method includes the steps stated below. At first, providing an LCD panel including a first substrate, a second substrate and a liquid crystal layer therebetween. The liquid crystal layer includes several photo-sensitive monomers and several liquid crystal molecules. The LCD panel has at least a first pixel and a second pixel. Afterwards, correspondingly driving the first pixel and the second pixel by the first voltage and the second voltage. At last, applying a ultra-violet source onto the LCD panel to enable several photo-sensitive monomers to polymerize several alignment polymers on the first substrate and the second substrate.Type: GrantFiled: December 8, 2005Date of Patent: June 1, 2010Assignee: AU Optronics Corp.Inventor: Hao-Yu Chang
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Publication number: 20100039607Abstract: A method for fabricating a liquid crystal display (LCD) is provided. The method includes the steps stated below. At first, providing an LCD panel including a first substrate, a second substrate and a liquid crystal layer therebetween. The liquid crystal layer includes several photo-sensitive monomers and several liquid crystal molecules. The LCD panel has at least a first pixel and a second pixel. Afterwards, correspondingly driving the first pixel and the second pixel by the first voltage and the second voltage. At last, applying a ultra-violet source onto the LCD panel to enable several photo-sensitive monomers to polymerize several alignment polymers on the first substrate and the second substrate.Type: ApplicationFiled: October 21, 2009Publication date: February 18, 2010Applicant: AU OPTRONICS CORP.Inventor: Hao-Yu CHANG
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Patent number: 7540975Abstract: An optically compensated birefringence liquid crystal alignment agent. The liquid crystal alignment agent includes one or more polymerizable monomers polymerized to form a polymer having liquid crystal alignment memory on an alignment layer by irradiating an energy ray. Liquid crystals are rapidly converted from splay state to bend state along the polymer memory direction so that a liquid crystal display reaches steady state immediately by only applying normal voltage, without application of high voltage. The invention also provides a liquid crystal display including the liquid crystal alignment agent and a method for fabricating the liquid crystal display.Type: GrantFiled: February 7, 2006Date of Patent: June 2, 2009Assignee: Au Optronics Corp.Inventors: Kun-Yu Lin, Kai-Neng Yang, Ming-Hung Wu, Hao-Yu Chang
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Publication number: 20090047860Abstract: A method for manufacturing a liquid crystal panel is disclosed. A mixture of liquid crystal and a solidifying material is dropped on a first substrate. A second substrate is provided such that the mixture is disposed between the first substrate and the second substrate. The solidifying material is solidified to connect the first and second substrates.Type: ApplicationFiled: October 24, 2008Publication date: February 19, 2009Applicant: AU OPTRONICS CORP.Inventors: Jen-Lang TUNG, Hao-Yu CHANG, Jung-Hsiang LIN
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Publication number: 20060279502Abstract: A method for fabricating a liquid crystal display (LCD) is provided. The method includes the steps stated below. At first, providing an LCD panel including a first substrate, a second substrate and a liquid crystal layer therebetween. The liquid crystal layer includes several photo-sensitive monomers and several liquid crystal molecules. The LCD panel has at least a first pixel and a second pixel. Afterwards, correspondingly driving the first pixel and the second pixel by the first voltage and the second voltage. At last, applying a ultra-violet source onto the LCD panel to enable several photo-sensitive monomers to polymerize several alignment polymers on the first substrate and the second substrate.Type: ApplicationFiled: December 8, 2005Publication date: December 14, 2006Inventor: Hao-Yu Chang
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Publication number: 20060268201Abstract: A manufacturing method of a liquid crystal display (LCD) panel includes the following steps. Firstly, a first substrate and a second substrate are provided wherein the first substrate has a first pixel, a second pixel and a third pixel. Then, a color alignment film is formed on the first substrate and is positioned between the first substrate and the second substrate. The color alignment film includes a first color alignment region, a second alignment region and a third alignment region, which are respectively corresponding to the first pixel, the second pixel and the third pixel. Afterwards, the first color alignment region, the second alignment region and the third alignment region are exposed to different exposure amounts. Finally, a liquid crystal layer is disposed between the first substrate and the second substrate.Type: ApplicationFiled: September 27, 2005Publication date: November 30, 2006Applicant: AU OPTRONICS CORP.Inventors: Hao-Yu Chang, Jen-Lang Tung
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Publication number: 20060202162Abstract: An optically compensated birefringence liquid crystal alignment agent. The liquid crystal alignment agent includes one or more polymerizable monomers polymerized to form a polymer having liquid crystal alignment memory on an alignment layer by irradiating an energy ray. Liquid crystals are rapidly converted from splay state to bend state along the polymer memory direction so that a liquid crystal display reaches steady state immediately by only applying normal voltage, without application of high voltage. The invention also provides a liquid crystal display including the liquid crystal alignment agent and a method for fabricating the liquid crystal display.Type: ApplicationFiled: February 7, 2006Publication date: September 14, 2006Inventors: Kun-Yu Lin, Kai-Neng Yang, Ming-Hung Wu, Hao-Yu Chang
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Publication number: 20060170855Abstract: A liquid crystal display panel and a fabrication method thereof are provided. The liquid crystal display panel includes a first substrate and a second substrate disposed opposite the first substrate. A liquid crystal layer and a thermosetting spacer are disposed between the first substrate and the second substrate.Type: ApplicationFiled: June 7, 2005Publication date: August 3, 2006Inventors: Jung-Hsiang Lin, Jen-Lang Tung, Hao-Yu Chang
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Publication number: 20060164588Abstract: A liquid crystal display panel is provided. The liquid crystal display panel includes a first substrate, a second substrate disposed parallel to the first substrate, a liquid crystal layer interposed therebetween, and a plurality of hybrid spacers disposed between the first substrate and second substrate, wherein the hybrid spacers comprise a soft material and a rigid material.Type: ApplicationFiled: May 31, 2005Publication date: July 27, 2006Inventors: Hao-Yu Chang, Jung-Hsiang Lin, Jen-Lang Tung
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Publication number: 20060139560Abstract: A method for manufacturing a liquid crystal panel is disclosed. A mixture of liquid crystal and a solidifying material is dropped on a first substrate. A second substrate is provided such that the mixture is disposed between the first substrate and the second substrate. The solidifying material is solidified to connect the first and second substrates.Type: ApplicationFiled: September 13, 2005Publication date: June 29, 2006Inventors: Jen-Lang Tung, Hao-Yu Chang, Jung-Hsiang Lin
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Publication number: 20060114404Abstract: A spacer and a liquid crystal display panel using the same are provided. The spacer is located between a first substrate and a second substrate. The spacer includes a bottom portion and a neck portion. The bottom portion is disposed on the first substrate. The neck portion is disposed on the bottom portion. The contact area between the neck portion and the bottom portion is smaller than that between the bottom portion and the first substrate.Type: ApplicationFiled: April 18, 2005Publication date: June 1, 2006Inventors: Jung-Hsiang Lin, Jen-Lang Tung, Hao-Yu Chang