Patents by Inventor Chan Hee Nam
Chan Hee Nam 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: 20240076242Abstract: A multilayer ceramic capacitor includes: a ceramic body in which dielectric layers and first and second internal electrodes are alternately stacked; and first and second external electrodes formed on an outer surface of the ceramic body and electrically connected to the first and second internal electrodes, respectively. In a microstructure of the dielectric layer, dielectric grains are divided by a dielectric grain size into sections each having an interval of 50 nm, respectively, a fraction of the dielectric grains in each of the sections within a range of 50 nm to 450 nm is within a range of 0.025 to 0.20, and a thickness of the dielectric layer is 0.8 ?m or less.Type: ApplicationFiled: November 6, 2023Publication date: March 7, 2024Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Seok Hyun YOON, Jung Deok PARK, Chan Hee NAM, Dong Hun KIM
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Patent number: 11845698Abstract: A multilayer ceramic capacitor includes: a ceramic body in which dielectric layers and first and second internal electrodes are alternately stacked; and first and second external electrodes formed on an outer surface of the ceramic body and electrically connected to the first and second internal electrodes, respectively. In a microstructure of the dielectric layer, dielectric grains are divided by a dielectric grain size into sections each having an interval of 50 nm, respectively, a fraction of the dielectric grains in each of the sections within a range of 50 nm to 450 nm is within a range of 0.025 to 0.20, and a thickness of the dielectric layer is 0.8 ?m or less.Type: GrantFiled: March 17, 2022Date of Patent: December 19, 2023Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Seok Hyun Yoon, Jung Deok Park, Chan Hee Nam, Dong Hun Kim
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Publication number: 20230343517Abstract: A dielectric ceramic composition includes a base material main component of barium titanate and a subcomponent. A microstructure of the dielectric ceramic composition after sintering includes a first grain having a Ca content of less than 3.5 at % and a second grain having a Ca content of 3.5 to 13.5 at %, and an area ratio of the second grain to an area of the total grains is 70% to 95%.Type: ApplicationFiled: June 27, 2023Publication date: October 26, 2023Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Seok Hyun YOON, Chan Hee NAM, Song Je JEON, Chang Hak CHOI
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Patent number: 11728094Abstract: A dielectric ceramic composition includes a base material main component of barium titanate and a subcomponent. A microstructure of the dielectric ceramic composition after sintering includes a first grain having a Ca content of less than 3.5 at % and a second grain having a Ca content of 3.5 to 13.5 at %, and an area ratio of the second grain to an area of the total grains is 70% to 95%.Type: GrantFiled: March 11, 2022Date of Patent: August 15, 2023Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Seok Hyun Yoon, Chan Hee Nam, Song Je Jeon, Chang Hak Choi
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Publication number: 20220220036Abstract: A multilayer ceramic capacitor includes: a ceramic body in which dielectric layers and first and second internal electrodes are alternately stacked; and first and second external electrodes formed on an outer surface of the ceramic body and electrically connected to the first and second internal electrodes, respectively. In a microstructure of the dielectric layer, dielectric grains are divided by a dielectric grain size into sections each having an interval of 50 nm, respectively, a fraction of the dielectric grains in each of the sections within a range of 50 nm to 450 nm is within a range of 0.025 to 0.20, and a thickness of the dielectric layer is 0.8 ?m or less.Type: ApplicationFiled: March 17, 2022Publication date: July 14, 2022Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Seok Hyun YOON, Jung Deok PARK, Chan Hee NAM, Dong Hun KIM
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Publication number: 20220199327Abstract: A dielectric ceramic composition includes a base material main component of barium titanate and a subcomponent. A microstructure of the dielectric ceramic composition after sintering includes a first grain having a Ca content of less than 3.5 at % and a second grain having a Ca content of 3.5 to 13.5 at %, and an area ratio of the second grain to an area of the total grains is 70% to 95%.Type: ApplicationFiled: March 11, 2022Publication date: June 23, 2022Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Seok Hyun YOON, Chan Hee NAM, Song Je JEON, Chang Hak CHOI
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Patent number: 11306031Abstract: A multilayer ceramic capacitor includes: a ceramic body in which dielectric layers and first and second internal electrodes are alternately stacked; and first and second external electrodes formed on an outer surface of the ceramic body and electrically connected to the first and second internal electrodes, respectively. In a microstructure of the dielectric layer, dielectric grains are divided by a dielectric grain size into sections each having an interval of 50 nm, respectively, a fraction of the dielectric grains in each of the sections within a range of 50 nm to 450 nm is within a range of 0.025 to 0.20, and a thickness of the dielectric layer is 0.8 ?m or less.Type: GrantFiled: January 31, 2020Date of Patent: April 19, 2022Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Seok Hyun Yoon, Jung Deok Park, Chan Hee Nam, Dong Hun Kim
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Patent number: 11309129Abstract: A dielectric ceramic composition includes a base material main component of barium titanate and a subcomponent. A microstructure of the dielectric ceramic composition after sintering includes a first grain having a Ca content of less than 3.5 at % and a second grain having a Ca content of 3.5 to 13.5 at %, and an area ratio of the second grain to an area of the total grains is 70% to 95%.Type: GrantFiled: January 30, 2020Date of Patent: April 19, 2022Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Seok Hyun Yoon, Chan Hee Nam, Song Je Jeon, Chang Hak Choi
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Publication number: 20200411239Abstract: A dielectric ceramic composition includes a base material main component of barium titanate and a subcomponent. A microstructure of the dielectric ceramic composition after sintering includes a first grain having a Ca content of less than 3.5 at % and a second grain having a Ca content of 3.5 to 13.5 at %, and an area ratio of the second grain to an area of the total grains is 70% to 95%.Type: ApplicationFiled: January 30, 2020Publication date: December 31, 2020Inventors: Seok Hyun YOON, Chan Hee NAM, Song Je JEON, Chang Hak CHOI
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Publication number: 20200165166Abstract: A multilayer ceramic capacitor includes: a ceramic body in which dielectric layers and first and second internal electrodes are alternately stacked; and first and second external electrodes formed on an outer surface of the ceramic body and electrically connected to the first and second internal electrodes, respectively. In a microstructure of the dielectric layer, dielectric grains are divided by a dielectric grain size into sections each having an interval of 50 nm, respectively, a fraction of the dielectric grains in each of the sections within a range of 50 nm to 450 nm is within a range of 0.025 to 0.20, and a thickness of the dielectric layer is 0.8 ?m or less.Type: ApplicationFiled: January 31, 2020Publication date: May 28, 2020Inventors: Seok Hyun YOON, Jung Deok PARK, Chan Hee NAM, Dong Hun KIM
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Patent number: 10584066Abstract: A multilayer ceramic capacitor includes: a ceramic body in which dielectric layers and first and second internal electrodes are alternately stacked; and first and second external electrodes formed on an outer surface of the ceramic body and electrically connected to the first and second internal electrodes, respectively. In a microstructure of the dielectric layer, dielectric grains are divided by a dielectric grain size into sections each having an interval of 50 nm, respectively, a fraction of the dielectric grains in each of the sections within a range of 50 nm to 450 nm is within a range of 0.025 to 0.20, and a thickness of the dielectric layer is 0.8 ?m or less.Type: GrantFiled: June 6, 2018Date of Patent: March 10, 2020Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Seok Hyun Yoon, Jung Deok Park, Chan Hee Nam, Dong Hun Kim
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Publication number: 20190100465Abstract: A multilayer ceramic capacitor includes: a ceramic body in which dielectric layers and first and second internal electrodes are alternately stacked; and first and second external electrodes formed on an outer surface of the ceramic body and electrically connected to the first and second internal electrodes, respectively. In a microstructure of the dielectric layer, dielectric grains are divided by a dielectric grain size into sections each having an interval of 50 nm, respectively, a fraction of the dielectric grains in each of the sections within a range of 50 nm to 450 nm is within a range of 0.025 to 0.20, and a thickness of the dielectric layer is 0.8 ?m or less.Type: ApplicationFiled: June 6, 2018Publication date: April 4, 2019Inventors: Seok Hyun YOON, Jung Deok PARK, Chan Hee NAM, Dong Hun KIM
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Patent number: 10236125Abstract: A dielectric ceramic composition contains: a barium titanate-based powder as a main ingredient; a first accessory ingredient containing Na; a second accessory ingredient containing Ba; and a third accessory ingredient containing Si. A content of the first accessory ingredient (based on moles of Na) is 0.3 to 4.0 moles per 100 moles of the main ingredient, and a Ba/Si ratio is in a range of 0.16 to 1.44.Type: GrantFiled: April 4, 2017Date of Patent: March 19, 2019Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Seok Hyun Yoon, Jung Deok Park, Chang Hak Choi, Dong Hun Kim, Seung Ho Lee, Chan Hee Nam
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Patent number: 9959976Abstract: A multilayer ceramic capacitor includes a ceramic body including dielectric layers and first and second internal electrodes disposed to face each other with respective dielectric layers interposed therebetween; and first and second external electrodes disposed on outer surfaces of the ceramic body, wherein the dielectric layer contains zirconium (Zr), a Zr content is 2×Zr/(Ba+Ca+Ti+Zr) based on an atomic ratio, a first crystal grain is composed of a core part having a Zr content of 3.0 at % or less and a shell part having a Zr content of 4.0 to 15.0 at %, and a number fraction of the first crystal grain to all crystal grains in the dielectric layer is 4% or more.Type: GrantFiled: September 27, 2016Date of Patent: May 1, 2018Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Seok Hyun Yoon, Dong Hun Kim, Jung Deok Park, Chan Hee Nam, Jung Wook Seo
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Patent number: 9928959Abstract: A dielectric ceramic composition and a multilayer ceramic capacitor containing the same are provided. The dielectric ceramic composition contains a base material powder represented by (1?x)BaTiO3?xPbTiO3 containing a first main ingredient represented by BaTiO3 and a second main ingredient represented by PbTiO3, wherein x satisfies 0.0025?x?0.4. The multilayer ceramic capacitor includes a ceramic body in which dielectric layers containing the dielectric ceramic composition are alternately stacked with first and second internal electrodes, and first and second external electrodes formed on both end portions of the ceramic body and respectively electrically connected to the first and second internal electrodes.Type: GrantFiled: March 9, 2016Date of Patent: March 27, 2018Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Seok Hyun Yoon, Sung Kwon Wi, Jung Deok Park, Jung Wook Seo, Chan Hee Nam, Dong Hun Kim
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Publication number: 20180033555Abstract: A dielectric ceramic composition contains: a barium titanate-based powder as a main ingredient; a first accessory ingredient containing Na; a second accessory ingredient containing Ba; and a third accessory ingredient containing Si. A content of the first accessory ingredient (based on moles of Na) is 0.3 to 4.0 moles per 100 moles of the main ingredient, and a Ba/Si ratio is in a range of 0.16 to 1.44.Type: ApplicationFiled: April 4, 2017Publication date: February 1, 2018Inventors: Seok Hyun YOON, Jung Deok PARK, Chang Hak CHOI, Dong Hun KIM, Seung Ho LEE, Chan Hee NAM
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Publication number: 20170271082Abstract: A multilayer ceramic capacitor includes a ceramic body including dielectric layers and first and second internal electrodes disposed to face each other with respective dielectric layers interposed therebetween; and first and second external electrodes disposed on outer surfaces of the ceramic body, wherein the dielectric layer contains zirconium (Zr), a Zr content is 2×Zr/(Ba+Ca+Ti+Zr) based on an atomic ratio, a first crystal grain is composed of a core part having a Zr content of 3.0 at % or less and a shell part having a Zr content of 4.0 to 15.0 at %, and a number fraction of the first crystal grain to all crystal grains in the dielectric layer is 4% or more.Type: ApplicationFiled: September 27, 2016Publication date: September 21, 2017Inventors: Seok Hyun YOON, Dong Hun KIM, Jung Deok PARK, Chan Hee NAM, Jung Wook SEO
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Patent number: 9666369Abstract: There are provided a dielectric ceramic composition and a multilayer ceramic capacitor containing the same. The dielectric ceramic composition according to the present disclosure may contain a main base material ingredient and a first accessory ingredient, wherein the first accessory ingredient contains samarium (Sm) and other rare earth (RE) elements, and a ratio (a/b) of a content (a) of samarium (Sm) to a content (b) of other rare earth elements in the first accessory ingredient satisfies 0.1?a/b?2.0.Type: GrantFiled: February 10, 2016Date of Patent: May 30, 2017Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Jae Sung Park, Chan Hee Nam, Doo Young Kim, Seok Hyun Yoon, Du Won Choi, Chang Hoon Kim
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Publication number: 20170011851Abstract: A dielectric ceramic composition and a multilayer ceramic capacitor containing the same are provided. The dielectric ceramic composition contains a base material powder represented by (1?x)BaTiO3?xPbTiO3 containing a first main ingredient represented by BaTiO3 and a second main ingredient represented by PbTiO3, wherein x satisfies 0.0025?x?0.4. The multilayer ceramic capacitor includes a ceramic body in which dielectric layers containing the dielectric ceramic composition are alternately stacked with first and second internal electrodes, and first and second external electrodes formed on both end portions of the ceramic body and respectively electrically connected to the first and second internal electrodes.Type: ApplicationFiled: March 9, 2016Publication date: January 12, 2017Inventors: Seok Hyun YOON, Sung Kwon WI, Jung Deok PARK, Jung Wook SEO, Chan Hee NAM, Dong Hun KIM
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Publication number: 20160307701Abstract: There are provided a dielectric ceramic composition and a multilayer ceramic capacitor containing the same. The dielectric ceramic composition according to the present disclosure may contain a main base material ingredient and a first accessory ingredient, wherein the first accessory ingredient contains samarium (Sm) and other rare earth (RE) elements, and a ratio (a/b) of a content (a) of samarium (Sm) to a content (b) of other rare earth elements in the first accessory ingredient satisfies 0.1?a/b?2.0.Type: ApplicationFiled: February 10, 2016Publication date: October 20, 2016Inventors: Jae Sung PARK, Chan Hee NAM, Doo Young KIM, Seok Hyun YOON, Du Won CHOI, Chang Hoon KIM