Patents by Inventor Li-Ming Chang
Li-Ming 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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Patent number: 10707376Abstract: An optoelectronic device includes a substrate; a semiconductor stack, formed on the substrate; a current blocking region, including a first pad portion formed above the semiconductor stack and wherein the current blocking region includes transparent insulated material; a transparent conductive layer, formed on the current blocking region and/or a surface of the semiconductor stack; a first opening, formed in the first pad portion, wherein in a top view, the first opening includes elongated shape; and a first electrode, including a first pad electrode formed above the first pad portion of the current blocking region and electrically connecting to the semiconductor stack through the first opening.Type: GrantFiled: October 3, 2019Date of Patent: July 7, 2020Assignee: EPISTAR CORPORATIONInventors: Tzung-Shiun Yeh, Li-Ming Chang, Chien-Fu Shen
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Publication number: 20200035863Abstract: An optoelectronic device includes a substrate; a semiconductor stack, formed on the substrate; a current blocking region, including a first pad portion formed above the semiconductor stack and wherein the current blocking region includes transparent insulated material; a transparent conductive layer, formed on the current blocking region and/or a surface of the semiconductor stack; a first opening, formed in the first pad portion, wherein in a top view, the first opening includes elongated shape; and a first electrode, including a first pad electrode formed above the first pad portion of the current blocking region and electrically connecting to the semiconductor stack through the first opening.Type: ApplicationFiled: October 3, 2019Publication date: January 30, 2020Inventors: Tzung-Shiun YEH, Li-Ming CHANG, Chien-Fu SHEN
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Publication number: 20200020839Abstract: A light-emitting device includes a first edge to a fourth edge; a semiconductor stack formed on a substrate, including a first semiconductor layer, a second semiconductor layer and an active layer; a first electrode formed on the first semiconductor layer, including a first pad electrode and a first finger electrode; and a second electrode formed on the second semiconductor layer, including a second pad electrode and a second finger electrode; wherein the first finger electrode is disposed at and along the first edge; and the first finger electrode includes a first overlapping portion overlapping the second finger electrode; the second finger electrode includes a second overlapping portion overlapping the first finger electrode and a non-overlapping portion that does not overlap the first finger electrode; and the second overlapping portion is not parallel with the first overlapping portion and the non-overlapping portion is not parallel with the first edge.Type: ApplicationFiled: September 23, 2019Publication date: January 16, 2020Inventors: Li-Ming CHANG, Tzung-Shiun YEH, Chien-Fu SHEN, Yu-Rui LIN, Chen OU, Hsin-Ying WANG, Hui-Chun YEH
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Patent number: 10505092Abstract: A light-emitting element, includes a first edge, a second edge, a third edge and a fourth edge; a substrate; a semiconductor stack formed on the substrate, including a first semiconductor layer, a second semiconductor layer and an active layer formed therebetween; a transparent conductive layer, formed on the second semiconductor layer; a first electrode formed on the first semiconductor layer, including a first pad electrode and a first finger electrode extending from the first pad electrode; and a second electrode formed on the first second semiconductor layer, including a second pad electrode and a second finger electrode extending from the second pad electrode; wherein the first finger electrode is disposed at and along the first edge; and wherein in top view, an overlapping portions of the first finger electrode and the second finger electrode are non-parallel.Type: GrantFiled: January 18, 2018Date of Patent: December 10, 2019Assignee: EPISTAR CORPORATIONInventors: Li-Ming Chang, Tzung-Shiun Yeh, Chien-Fu Shen, Yu-Rui Lin, Chen Ou, Hsin-Ying Wang, Hui-Chun Yeh
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Patent number: 10475962Abstract: An optoelectronic device includes a substrate; a semiconductor stack, formed on the substrate; a current blocking region, formed above the semiconductor stack and comprising a first pad portion and a first finger portion; a first opening, formed in the first pad portion, wherein in a top view, the first opening comprises an elongated shape defined by the first pad portion; a transparent conductive layer formed on the current blocking region and/or a surface of the semiconductor stack; and a first electrode formed above the current blocking region; wherein the transparent conductive layer comprises a second opening to expose the first opening, and the first electrode electrically connects the semiconductor stack through the first opening and the second opening.Type: GrantFiled: February 6, 2018Date of Patent: November 12, 2019Assignee: EPISTAR CORPORATIONInventors: Tzung-Shiun Yeh, Li-Ming Chang, Chien-Fu Shen
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Publication number: 20190189850Abstract: A light-emitting device, includes a first semiconductor stack formed on a substrate, including a first semiconductor layer, a second semiconductor layer and an active layer formed therebetween; a first electrode formed on the first semiconductor layer; a second electrode formed on the second semiconductor layer, including a second pad electrode and a second finger electrode extending from the second pad electrode; a second current blocking region formed under the second electrode, including a second core region under the second pad electrode and a extending region under the second finger electrode; and a transparent conductive layer, formed on the second semiconductor layer and covering the extending region; wherein a contour of the second core region has a shape different from that of the second pad electrode; wherein the transparent conductive layer includes a first opening having a width wider than a width of the second pad electrode, wherein the second finger electrode includes a portion extending from thType: ApplicationFiled: December 14, 2018Publication date: June 20, 2019Inventors: Hsin-Ying WANG, Hui-Chun YEH, Li-Ming CHANG, Chien-Fu SHEN, Chen OU
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Publication number: 20180233629Abstract: An optoelectronic device includes a substrate; a semiconductor stack, formed on the substrate; a current blocking region, formed above the semiconductor stack and comprising a first pad portion and a first finger portion; a first opening, formed in the first pad portion and comprising an elongate shape; and a first electrode formed above the current blocking region and electrically connecting to the semiconductor stack through the first opening.Type: ApplicationFiled: February 6, 2018Publication date: August 16, 2018Inventors: Tzung-Shiun YEH, Li-Ming CHANG, Chien-Fu SHEN
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Publication number: 20180212123Abstract: A light-emitting element, includes a first edge, a second edge, a third edge and a fourth edge; a substrate; a semiconductor stack formed on the substrate, including a first semiconductor layer, a second semiconductor layer and an active layer formed therebetween; a transparent conductive layer, formed on the second semiconductor layer; a first electrode formed on the first semiconductor layer, including a first pad electrode and a first finger electrode extending from the first pad electrode; and a second electrode formed on the first second semiconductor layer, including a second pad electrode and a second finger electrode extending from the second pad electrode; wherein the first finger electrode is disposed at and along the first edge; and wherein in top view, an overlapping portions of the first finger electrode and the second finger electrode are non-parallel.Type: ApplicationFiled: January 18, 2018Publication date: July 26, 2018Inventors: Li-Ming CHANG, Tzung-Shiun YEH, Chien-Fu SHEN, Yu-Rui LIN, Chen OU, Hsin-Ying WANG, Hui-Chun YEH
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Patent number: 9099612Abstract: This application provides a semiconductor light-emitting device and the manufacturing method thereof. The semiconductor light-emitting device comprises a semiconductor light-emitting structure and a thinned substrate. The semiconductor light-emitting structure comprises a plurality of semiconductor layers and a plurality of first channels, wherein a plurality of first channels has a predetermined depth that penetrating at least two layers of the plurality of semiconductor layers.Type: GrantFiled: July 29, 2011Date of Patent: August 4, 2015Assignee: EPISTAR CORPORATIONInventors: Min-Hsun Hsieh, Wei-Yu Chen, Li-Ming Chang, Chien-Yuan Wang, Chiu-Lin Yao
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Patent number: 9051429Abstract: Additives of a polyamic acid resin composition are disclosed, including an ester-phenol compound, an imidazole compound, and a heterocyclic aromatic amine compound other than the imidazole compound. The high cyclization temperature and long cyclization period of conventional polyamic acid resin compositions can be lowered and shorten by the additives of the invention. In addition, a metal foil and the polyimide resin formed from the cyclization have excellent adhesive strength, high flat degree, and excellent electrical property.Type: GrantFiled: October 26, 2009Date of Patent: June 9, 2015Assignee: Industrial Technology Research InstituteInventors: Li-Ming Chang, Charng-Shing Lu, Shur-Fen Liu, Jinn-Shing King
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Publication number: 20120121913Abstract: Disclosed is an adhesive composition including 100 parts by weight of lignin, 150 to 400 parts by weight of epoxy resin, and 7.5 to 200 parts by weight of flexibilizer. The lignin and the flexibilizer can be pre-reacted to enhance the physical properties, e.g. glass transition temperature (Tg) and flexural endurance (MIT), of the cured adhesive composition. Furthermore, the adhesive composition and a flexible metal foil can be laminated to form a flexible substrate.Type: ApplicationFiled: December 22, 2010Publication date: May 17, 2012Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Li-Ming CHANG, Meng-Huei CHEN, Shur-Fen LIU, Jinn-Shing KING, Yung-Chan LIN
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Publication number: 20120025250Abstract: This application provides a semiconductor light-emitting device and the manufacturing method thereof. The semiconductor light-emitting device comprises a semiconductor light-emitting structure and a thinned substrate. The semiconductor light-emitting structure comprises a plurality of semiconductor layers and a plurality of first channels, wherein a plurality of first channels has a predetermined depth that penetrating at least two layers of the plurality of semiconductor layers.Type: ApplicationFiled: July 29, 2011Publication date: February 2, 2012Applicant: Epistar CorporationInventors: Min-Hsun Hsieh, Wei-Yu Chen, Li-Ming Chang, Chien-Yuan Wang, Chiu-Lin Yao
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Publication number: 20110054124Abstract: Additives of a polyamic acid resin composition are disclosed, including an ester-phenol compound, an imidazole compound, and a heterocyclic aromatic amine compound other than the imidazole compound. The high cyclization temperature and long cyclization period of conventional polyamic acid resin compositions can be lowered and shorten by the additives of the invention.Type: ApplicationFiled: October 26, 2009Publication date: March 3, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Li-Ming Chang, Charng-Shing Lu, Shur-Fen Liu, Jinn-Shing King