Patents by Inventor Miki Adachi
Miki Adachi 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: 11600410Abstract: A thermistor has a thermistor element, a protective film, and an electrode portion. The protective film is formed of a SiO2 film having a film thickness in a range of 50 nm or more and 1000 nm or less. The protective film is formed in contact with the thermistor element. Alkali metal is unevenly distributed in a region including an interface between the thermistor element and the protective film.Type: GrantFiled: August 21, 2019Date of Patent: March 7, 2023Assignee: MITSUBISHI MATERIALS CORPORATIONInventors: Takehiro Yonezawa, Miki Adachi
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Publication number: 20210166846Abstract: A thermistor has a thermistor element, a protective film, and an electrode portion. The protective film is formed of a SiO2 film having a film thickness in a range of 50 nm or more and 1000 nm or less. The protective film is formed in contact with the thermistor element. Alkali metal is unevenly distributed in a region including an interface between the thermistor element and the protective film.Type: ApplicationFiled: August 21, 2019Publication date: June 3, 2021Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Takehiro Yonezawa, Miki Adachi
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Patent number: 7937825Abstract: A surge protector coated with an oxide layer having an excellent chemical stability at the high temperature range and excellent adherence with respect to main discharge electrodes. The surge protector includes a column-shaped ceramic member that has a conductive film divided by a discharge gap interposed therebetween; a pair of main discharge electrode members opposite to each other on both ends of the column-shaped ceramic member to come in contact with the conductive film; and a cylindrical ceramic tube which is fitted to the pair of main discharge electrode members opposite to each other to seal both the column-shaped ceramic member and sealing gas inside thereof. Oxide films are formed on main discharge surfaces of at least the protrusive supporting portions of the pair of main discharge electrode members opposite to each other, by performing an oxidation treatment, respectively.Type: GrantFiled: April 21, 2008Date of Patent: May 10, 2011Assignee: Mitsubishi Materials CorporationInventors: Yasuhiro Shato, Tsuyoshi Ogi, Miki Adachi, Sung-Gyoo Lee, Takashi Kurihara, Toshiaki Ueda
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Patent number: 7733622Abstract: This surge absorber includes an insulating part upon which is formed a conductive layer which is divided into two separate portions by a discharge gap (micro gap) around its circumferential surface; a pair of terminal electrodes which are arranged to oppose the insulating part, and contacts the conductive layer; an insulating tube at the ends of which the terminal electrodes are arranged, and which seals the insulating part in its interior along with seal gases; and a conductive portion provided at least between the terminal electrodes and the conductive layer. As a result, it becomes possible to provide a surge absorber of lower cost, and which is endowed with stabilized performance and high quality, while moreover it exhibits excellent durability.Type: GrantFiled: February 27, 2004Date of Patent: June 8, 2010Assignee: Mitsubishi Materials CorporationInventors: Toshiaki Ueda, Miki Adachi, Yasuhiro Shato, Tuyoshi Ogi, Takashi Kurihara, Sung-Gyoo Lee
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Patent number: 7660095Abstract: A surge protector coated with an oxide layer having an excellent chemical stability at the high temperature range and excellent adherence with respect to main discharge electrodes. The surge protector includes a column-shaped ceramic member that has a conductive film divided by a discharge gap interposed therebetween; a pair of main discharge electrode members opposite to each other on both ends of the column-shaped ceramic member to come in contact with the conductive film; and a cylindrical ceramic tube which is fitted to the pair of main discharge electrode members opposite to each other to seal both the column-shaped ceramic member and sealing gas inside thereof. Oxide films are formed on main discharge surfaces of at least the protrusive supporting portions of the pair of main discharge electrode members opposite to each other, by performing an oxidation treatment, respectively.Type: GrantFiled: July 13, 2004Date of Patent: February 9, 2010Assignee: Mitsubishi Materials CorporationInventors: Yasuhiro Shato, Tuyoshi Ogi, Miki Adachi, Sung-Gyoo Lee, Takashi Kurihara, Toshiaki Ueda
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Patent number: 7570473Abstract: There is provided a surge absorber which has excellent chemical stability in a high-temperature region upon a sealing process and main discharge and has a long life span, by applying an oxide layer having excellent adhesion to a main discharge surface. A columnar ceramics in which conductive coating films are separately formed via a discharge gap, a pair of main discharge electrode members which face each other and are in contact with the conductive coating films and a barrel-shaped ceramics in which the columnar ceramics is enclosed together with sealing gas are included, and a glass member is enclosed in the barrel-shaped ceramics.Type: GrantFiled: July 14, 2005Date of Patent: August 4, 2009Assignee: Mitsubishi Materials CorporationInventors: Miki Adachi, Toshiaki Ueda
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Publication number: 20080222880Abstract: A surge protector coated with an oxide layer having an excellent chemical stability at the high temperature range and excellent adherence with respect to main discharge electrodes. The surge protector includes a column-shaped ceramic member that has a conductive film divided by a discharge gap interposed therebetween; a pair of main discharge electrode members opposite to each other on both ends of the column-shaped ceramic member to come in contact with the conductive film; and a cylindrical ceramic tube which is fitted to the pair of main discharge electrode members opposite to each other to seal both the column-shaped ceramic member and sealing gas inside thereof. Oxide films are formed on main discharge surfaces of at least the protrusive supporting portions of the pair of main discharge electrode members opposite to each other, by performing an oxidation treatment, respectively.Type: ApplicationFiled: April 21, 2008Publication date: September 18, 2008Applicant: Mitsubishi Materials CorporationInventors: Yasuhiro Shato, Tuyoshi Ogi, Miki Adachi, Sung-Gyoo Lee, Takashi Kurihara, Toshiaki Ueda
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Publication number: 20080049370Abstract: There is provided a surge absorber which has excellent chemical stability in a high-temperature region upon a sealing process and main discharge and has a long life span, by applying an oxide layer having excellent adhesion to a main discharge surface. A columnar ceramics in which conductive coating films are separately formed via a discharge gap, a pair of main discharge electrode members which face each other and are in contact with the conductive coating films and a barrel-shaped ceramics in which the columnar ceramics is enclosed together with sealing gas are included, and a glass member is enclosed in the barrel-shaped ceramics.Type: ApplicationFiled: July 14, 2005Publication date: February 28, 2008Applicant: Mitsubishi Materials CorporationInventors: Miki Adachi, Toshiaki Ueda
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Publication number: 20070285866Abstract: This surge absorber includes an insulating part upon which is formed a conductive layer which is divided into two separate portions by a discharge gap (micro gap) around its circumferential surface; a pair of terminal electrodes which are arranged to oppose the insulating part, and contacts the conductive layer; an insulating tube at the ends of which the terminal electrodes are arranged, and which seals the insulating part in its interior along with seal gases; and a conductive portion provided at least between the terminal electrodes and the conductive layer. As a result, it becomes possible to provide a surge absorber of lower cost, and which is endowed with stabilized performance and high quality, while moreover it exhibits excellent durability.Type: ApplicationFiled: February 27, 2004Publication date: December 13, 2007Applicant: Mitsubishi Materials CorporationInventors: Toshiaki Ueda, Miki Adachi, Yasuhiro Shato, Tuyoshi Ogi, Takashi Kurihara, Sung-Gyoo Lee
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Publication number: 20070058317Abstract: A surge protector coated with an oxide layer having an excellent chemical stability at the high temperature range and excellent adherence with respect to main discharge electrodes. The surge protector includes a column-shaped ceramic member that has a conductive film divided by a discharge gap interposed therebetween; a pair of main discharge electrode members opposite to each other on both ends of the column-shaped ceramic member to come in contact with the conductive film; and a cylindrical ceramic tube which is fitted to the pair of main discharge electrode members opposite to each other to seal both the column-shaped ceramic member and sealing gas inside thereof. Oxide films are formed on main discharge surfaces of at least the protrusive supporting portions of the pair of main discharge electrode members opposite to each other, by performing an oxidation treatment, respectively.Type: ApplicationFiled: July 13, 2004Publication date: March 15, 2007Applicant: Mitsubishi Materials CorporationInventors: Yasuhiro Shato, Tuyoshi Ogi, Miki Adachi, Sung-Gyoo Lee, Takashi Kurihara, Toshiaki Ueda
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Patent number: 6676487Abstract: A surface of a vapor-phase deposited, synthetic thin diamond film is polished by: preparing a polishing liquid of silicon dioxide powder particles having an average particle size within the range of from 5 to 1,000 nm dispersed and distributed in an aqueous solution in an amount of from 5 to 40 wt. %, the dispersion having a coefficient of viscosity of from 1 to 200 cP and a pH of from 8 to 12.5, applying the polishing liquid to a surface of a vapor-phase synthetic thin diamond film and bringing a flat surface of a stool composed of a soft artificial or natural organic material into contact with the surface; and repetitively applying a mutual planar movement under pressure between the surface of said stool and the surface of the thin diamond film.Type: GrantFiled: November 17, 1998Date of Patent: January 13, 2004Assignee: Mitsubishi Materials CorporationInventor: Miki Adachi
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Patent number: 6302768Abstract: A surface of a vapor-phase deposited, synthetic thin diamond film is polished by: preparing a polishing liquid of silicon dioxide powder particles having an average particle size within the range of from 5 to 1,000 nm dispersed and distributed in an aqueous solution in an amount of from 5 to 40 wt. %, the dispersion having a coefficient of viscosity of from 1 to 200 cP and a pH of from 8 to 12.5, applying the polishing liquid to a surface of a vapor-phase synthetic thin diamond film and bringing a flat surface of a stool composed of a soft artificial or natural organic material into contact with the surface; and repetitively applying a mutual planar movement under pressure between the surface of said stool and the surface of the thin diamond film.Type: GrantFiled: October 5, 2000Date of Patent: October 16, 2001Assignee: Mitsubishi Materials CorporationInventor: Miki Adachi
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Patent number: 6159604Abstract: A diamond powder, comprises diamond powder particles, and polar and non-polar groups, bonded onto surfaces of the particles. This seed diamond powder and a dispersed solution thereof can be used to seed a substrate for the deposition of diamond at a high nucleation density for chemical vapor deposition of synthetic diamond.Type: GrantFiled: October 9, 1998Date of Patent: December 12, 2000Assignee: Mitsubishi Materials CorporationInventor: Miki Adachi