Patents by Inventor Jeong Chang Lee
Jeong Chang Lee 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).
-
Patent number: 11923035Abstract: A pseudo dual port memory device in which an operating speed is improved and stability is increased is provided. The pseudo dual port memory device may include a memory cell, a pair of bit lines connected to the memory cell, a write driver, a sense amp, and a column multiplexer which is connected to the bit lines, receives a write multiplexer control signal and a read multiplexer control signal, connects the bit lines to the write driver in response to the write multiplexer control signal, and connects the bit lines to the sense amp in response to the read multiplexer control signal. A precharge control signal generation circuit which is connected to the column multiplexer may generate a precharge control signal on the basis of the read and write multiplexer control signals, and a bit line precharge circuit may precharge the bit lines based on the precharge control signal.Type: GrantFiled: February 10, 2022Date of Patent: March 5, 2024Assignee: Samsung Electronics Co., Ltd.Inventors: Chan Ho Lee, Tae Min Choi, Jeong Kyun Kim, Hyeong Cheol Kim, Suk Youn, Ju Chang Lee, Kyu Won Choi
-
Publication number: 20180086934Abstract: [Object of this Invention] To provide the amorphous fluorine-containing resin composition that has superior film-forming ability, and has a small impact on the global environment due to its very small global warming potential, and can fully satisfy the requirement from the perspective of the environmental protection of the earth; and to provide the article that contains the coating that is formed from the thin films that are made from this amorphous fluorine-containing resin. composition.Type: ApplicationFiled: December 4, 2017Publication date: March 29, 2018Inventors: Masaki Mugisawa, Yuji Mochizuki, Jeong Chang Lee
-
Patent number: 9862852Abstract: [Object of this invention] To provide the amorphous fluorine-containing resin composition that has superior film-forming ability, and has a small impact on the global environment due to its very small global warming potential, and can fully satisfy the requirement from the perspective of the environmental protection of the earth; and to provide the article that contains the coating that is formed from the thin films that are made from this amorphous fluorine-containing resin. composition. [Means to solve the problems] The amorphous fluorine-containing resin composition that dissolves the amorphous fluorine-containing resin in alkoxy fluoroalkene. This invention also provides the article that contains the coating that is formed from the thin films that are made from this amorphous fluorine-containing resin composition.Type: GrantFiled: September 26, 2013Date of Patent: January 9, 2018Assignee: DUPONT-MITSUI FLUOROCHEMICALS CO., LTD.Inventors: Masaki Mugisawa, Yuji Mochizuki, Jeong Chang Lee
-
Patent number: 9624326Abstract: Purpose: To provide a melt-moldable tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer with excellent durability without causing an excessive decrease of the melt flow rate and an increase of the perfluoro(alkyl vinyl ether) content. Solution means: A melt-moldable tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, which is characterized in that in a parallel plate mode of a dynamic viscoelasticity measuring device, when the temperature is raised from ?40° C. to 200° C. at 5° C./min while fixing the measuring frequency to 1 Hz, the slope (? tan ?/?T) of the loss tangent (tan ?) measured between two arbitrary points in a range of 50-75° C. and at a temperature difference of 3° C. or higher is always in a range of 0.0005-0.0030, and its preparation method.Type: GrantFiled: June 20, 2013Date of Patent: April 18, 2017Assignee: DUPONT-MITSUI FLUOROCHEMICALS COMPANY, LTD.Inventors: Hitomi Kitagawa, Yuji Mochizuki, Jeong Chang Lee
-
Publication number: 20150259558Abstract: [Object of this invention] To provide the amorphous fluorine-containing resin composition that has superior film-forming ability, and has a small impact on the global environment due to its very small global warming potential, and can fully satisfy the requirement from the perspective of the environmental protection of the earth; and to provide the article that contains the coating that is formed from the thin films that are made from this amorphous fluorine-containing resin. composition. [Means to solve the problems] The amorphous fluorine-containing resin composition that dissolves the amorphous fluorine-containing resin in alkoxy fluoroalkene. This invention also provides the article that contains the coating that is formed from the thin films that are made from this amorphous fluorine-containing resin composition.Type: ApplicationFiled: September 26, 2013Publication date: September 17, 2015Inventors: Masaki Mugisawa, Yuji Mochizuki, Jeong Chang Lee
-
Patent number: 8784961Abstract: Perfluoropolymer composites are provided which are obtained by dispersing layered-silicates having properties of swelling or cleaving in dispersion media in perfluoropolymers and having the ratio of the viscosity, V0.1, at 0.1 rad/sec by a parallel plate mode of a dynamic rheometer to the viscosity, V1, measured at 1 rad/sec is 1.5 or greater, viscosity being measured at 340° C. A method for making the perfluoropolymer composites is provided, and molded articles therefrom. And additionally, perfluoropolymer composites, where layered-silicates having properties of swelling or cleaving in dispersion media are dispersed in perfluoropolymers, with the storage elasticity of 2 times or higher than that of fluoropolymers, at temperatures greater than the glass transition temperature of perfluoropolymers.Type: GrantFiled: June 11, 2009Date of Patent: July 22, 2014Inventors: Pham Hoai Nam, Jeong Chang Lee, Kenji Oki, Hajime Sato
-
Patent number: 8779046Abstract: A polymer composition is disclosed wherein inorganic particles are uniformly dispersed at the nano level in a polymer without having the inorganic particles being surface-treated. Further disclosed is a method for manufacturing a polymer composition wherein a co-aggregate which is obtained by uniformly mixing polymer dispersion with an inorganic particle colloidal solution and co-aggregating the polymer primary particles and inorganic particles which are heterogeneous particles, is separated from the solvent and dried so that the inorganic particles are uniformly dispersed at the nano level in the polymer.Type: GrantFiled: June 28, 2010Date of Patent: July 15, 2014Inventors: Pham H. Nam, Jeong Chang Lee
-
Patent number: 8618203Abstract: The present invention relates to a heat-meltable fluoropolymer composite composition having excellent thermal conductivity, gas and chemical liquid barrier properties and dynamic properties such as storage modulus which comprises a heat-meltable fluoropolymer fine powder and a layered-compound organized by treatment with tetraphenyl phosphonium ions. The present invention also relates to a heat-meltable fluoropolymer composite composition having similar properties to those mentioned above which is obtained by a process (I) in which a heat-meltable fluoropolymer composite composition is obtained by grinding and mixing a heat-meltable fluoropolymer fine powder and a layered-compound and a process (II) in which such heat-meltable fluoropolymer composite composition thus obtained is melted and mixed under shear stress by means of a melt-mixing extruder.Type: GrantFiled: October 16, 2009Date of Patent: December 31, 2013Assignees: Dupont-Mitsui Fluorochemicals Co., Ltd., E.I. Dupont de Nemours & CompanyInventors: Jeong Chang Lee, Noriyuki Suzuki, Shousaku Kondo, Hajime Sato
-
Publication number: 20130046058Abstract: [Object] To provide a fluororesin molded article having a lowered concentration, of eluted fluorine ions subsequent to molding, and to provide a method for producing a fluororesin molded, article, a fluororesin molded article, and a fluororesin composition whereby the concentration of eluted fluorine ions is lowered. [Means] A method for producing a fluororesin molded article in which fluororesin is melt-molded in the presence of a fluorine ion lowering compound, the molded article obtained thereby, and a fluororesin composition. Ammonia, urea, nitrogen compounds that generate ammonia, and alkalis are preferred examples of the fluorine ion lowering compound. The present invention also offers a molded article formed from fetrafluoroethylene/perfluoro(alkylvinyl ether) that has a fluorine ion concentration of 1 ppm or less.Type: ApplicationFiled: May 2, 2011Publication date: February 21, 2013Applicant: Dupont-Mitsui Fluorochemicals Company, LTDInventors: Hoai-Nam Pham, Hiromasa Yabe, Jeong Chang Lee
-
Publication number: 20100261809Abstract: The present invention provides a polymer composition wherein inorganic particles are uniformly dispersed at the nano level in the polymer without having said inorganic particles being surface-treated. It further provides a method for manufacturing a polymer composition wherein a co-aggregate which is obtained by uniformly mixing polymer dispersion with an inorganic particle colloidal solution and co-aggregating the polymer primary particles and inorganic particles which are heterogeneous particles, is separated from the solvent and dried so that the inorganic particles are uniformly dispersed at the nano level in the polymer; and the polymer composition which is obtained by said method.Type: ApplicationFiled: June 28, 2010Publication date: October 14, 2010Applicant: DUPONT-MITSUI FLUOROCHEMICALS CO LTDInventors: Pham H. Nam, Jeong Chang Lee
-
Publication number: 20100081747Abstract: The present invention provides a polymer composition wherein inorganic particles are uniformly dispersed at the nano level in the polymer without having said inorganic particles being surface-treated. It further provides a method for manufacturing a polymer composition wherein a co-aggregate which is obtained by uniformly mixing polymer dispersion with an inorganic particle colloidal solution and co-aggregating the polymer primary particles and inorganic particles which are heterogeneous particles, is separated from the solvent and dried so that the inorganic particles are uniformly dispersed at the nano level in the polymer; and the polymer composition which is obtained by said method.Type: ApplicationFiled: September 29, 2006Publication date: April 1, 2010Inventors: Pham H. Nam, Jeong Chang Lee
-
Publication number: 20100036021Abstract: The present invention relates to a heat-meltable fluoropolymer composite composition having excellent thermal conductivity, gas and chemical liquid barrier properties and dynamic properties such as storage modulus which comprises a heat-meltable fluoropolymer fine powder and a layered-compound organized by treatment with tetraphenyl phosphonium ions. The present invention also relates to a heat-meltable fluoropolymer composite composition having similar properties to those mentioned above which is obtained by a process (I) in which a heat-meltable fluoropolymer composite composition is obtained by grinding and mixing a heat-meltable fluoropolymer fine powder and a layered-compound and a process (II) in which such heat-meltable fluoropolymer composite composition thus obtained is melted and mixed under shear stress by means of a melt-mixing extruder.Type: ApplicationFiled: October 16, 2009Publication date: February 11, 2010Applicants: DU PONT-MITSUI FLUOROCHEMICALS CO., LTD., E.I. DU PONT DE NEMOURS & COMPANYInventors: Jeong Chang LEE, Noriyuki Suzuki, Shousaku Kondo, Hajime Sato
-
Publication number: 20100000771Abstract: The present invention is to significantly improve copper-foil adhesion strength (copper-foil peel strength) without roughening or blackening a copper-foil surface, and thereby to provide a copper-clad laminate used favorably in a high frequency range. The copper-clad laminate (101) for a single-sided printed-wiring board is formed by bonding a copper foil (4) onto a surface of an insulating substrate (2) with an LCP/PFA composite film (3) disposed in between. The insulating substrate (2) is made of a fluororesin prepreg 2A. The copper foil (4) is a rolled copper foil, the both surfaces of which are smooth and not roughened or blackened. The insulating substrate (2) and the copper foil (4) are bonded to each other with the composite film (3) disposed in between by firing and pressing them under temperature conditions which are 5° C. to 40° C. higher than the melting point of PFA and lower than the melting point of LCP.Type: ApplicationFiled: September 21, 2006Publication date: January 7, 2010Applicants: Nippon Pillar Packing Co., Ltd., Junkosha Inc., DuPont-Mitsui Fluorochemicals Co., Ltd.Inventors: Koichi Shimauchi, Hirofumi Ito, Jeong Chang Lee
-
Publication number: 20090297751Abstract: Perfluoropolymer composites are provided which are obtained by dispersing layered-silicates having properties of swelling or cleaving in dispersion media in perfluoropolymers and having the ratio of the viscosity, V0.1, at 0.1 rad/sec by a parallel plate mode of a dynamic rheometer to the viscosity, V1, measured at 1 rad/sec is 1.5 or greater, viscosity being measured at 340° C. A method for making the perfluoropolymer composites is provided, and molded articles therefrom. And additionally, perfluoropolymer composites, where layered-silicates having properties of swelling or cleaving in dispersion media are dispersed in perfluoropolymers, with the storage elasticity of 2 times or higher than that of fluoropolymers, at temperatures greater than the glass transition temperature of perfluoropolymers.Type: ApplicationFiled: June 11, 2009Publication date: December 3, 2009Applicant: DUPONT-MITSUI FLUOROCHEMICALS CO LTDInventors: Pham Hoai Nam, Jeong Chang Lee, Kenji Oki, Hajime Sato
-
Patent number: 7560005Abstract: The present invention provides fluoropolymer laminates having isotropic properties. For example, an embodiment in which multiple fluoropolymer sheets having a liquid crystalline polymer oriented in the fibrous state in the melt processible fluoropolymer are laminated, despite having the fibrous LCP oriented in one direction in each single extruded sheet, makes it possible to laminate in such a way as to compensate for their orientation directions, the laminate thereby becoming isotropic as regards physical properties. The laminates also have low linear coefficient of expansion and low thermal shrinkage as well as elevated tensile modulus and low dielectric constant.Type: GrantFiled: April 26, 2007Date of Patent: July 14, 2009Assignee: Dupont-Mitsui Fluorochemicals Co LtdInventors: Jeong Chang Lee, Shosaku Kondo
-
Patent number: 7553907Abstract: Melt processible fluoropolymer containing functional groups such as hydroxyl and nitrile have antistatic properties that make them suitable in articles and parts for use in conditions where static electricity can be a problem, such as copying machines and fuel lines.Type: GrantFiled: August 23, 2004Date of Patent: June 30, 2009Assignee: DuPont-Mitsui Fluorochemicals Co LtdInventor: Jeong Chang Lee
-
Patent number: 7495049Abstract: There is provided a composition of melt processible fluoropolymer and inorganic fine particles of average particle size 1 ?m or less dispersed in said fluoropolymer, said composition being obtained by melt-mixing said melt processible fluoropolymer and aggregated said inorganic fine particles, said aggregated inorganic fine particles being obtained by drying a mixed solution of inorganic fine particles and an inorganic salt to obtain a solid material, removing the inorganic salt from this solid material using a solvent, and then drying at a temperature where surface fusion between the inorganic fine particles does not occur, whereby said aggregates are the result of the mutual cohesive force of the inorganic fine particles, which has good physical properties and dimensional stability compared to the melt processible fluoropolymer alone.Type: GrantFiled: January 31, 2006Date of Patent: February 24, 2009Assignee: Du Pont - Mitsoi Fluorochemicals Co, Ltd.Inventor: Jeong Chang Lee
-
Patent number: 7439200Abstract: An improved circuit substrate is provided wherein glass cloth is completely embedded within fluoropolymer by thermocompression to form a composite structure, which when containing an adhesive agent such as the combination of functional groups and liquid crystal polymer is self-adhering to a metal layer such as of copper.Type: GrantFiled: August 17, 2006Date of Patent: October 21, 2008Assignee: DuPont-Mitsui Fluorochemicals Co. Ltd.Inventors: Jeong Chang Lee, Etsuya Taki
-
Publication number: 20080081182Abstract: Perfluoropolymer composites are provided which are obtained by dispersing layered-silicates having properties of swelling or cleaving in dispersion media in perfluoropolymers and having the ratio of the viscosity, V0.1, at 0.1 rad/sec by a parallel plate mode of a dynamic rheometer to the viscosity, V1, measured at 1 rad/sec is 1.5 or greater, viscosity being measured at 340° C. A method for making the perfluoropolymer composites is provided, and molded articles therefrom. And additionally, perfluoropolymer composites, where layered-silicates having properties of swelling or cleaving in dispersion media are dispersed in perfluoropolymers, with the storage elasticity of 2 times or higher than that of fluoropolymers, at temperatures greater than the glass transition temperature of perfluoropolymers.Type: ApplicationFiled: September 28, 2007Publication date: April 3, 2008Inventors: Pham Hoai Nam, Jeong Chang Lee, Kenji Oki, Hajime Sato
-
Patent number: 7261937Abstract: The present invention provides fluoropolymer laminates having isotropic properties. For example, an embodiment in which multiple fluoropolymer sheets having an liquid crystalline polymer oriented in the fibrous state in the melt processible fluoropolymer are laminated, despite having the fibrous LCP oriented in one direction in each single extruded sheet, makes it possible to laminate in such a way as to compensate for their orientation directions, the laminate thereby becoming isotropic as regards physical properties. The laminates also have low linear coefficient of expansion and low thermal shrinkage as well as elevated tensile modulus and low-dielectric constant.Type: GrantFiled: May 15, 2006Date of Patent: August 28, 2007Assignee: Dupont-mitsui Fluorochemicals Co. Ltd.Inventors: Jeong Chang Lee, Shosaku Kondo