Patents by Inventor Masayuki Kohno
Masayuki Kohno 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: 20120208376Abstract: A method of forming a silicon nitride film by using a plasma CVD method, where the silicon nitride film has abundant traps and is useful as a charge accumulation layer of a nonvolatile semiconductor memory device. A silicon nitride film having a lot of traps is formed by performing plasma CVD by using processing gases including a nitrogen gas and a gas of a compound formed of silicon atoms and chlorine atoms, and by setting a pressure in a processing container within a range between more than or equal to 0.1 Pa and less than or equal to 8 Pa, in a plasma CVD apparatus that performs film-formation by introducing microwaves in the processing container by using a planar antenna having a plurality of holes to generate plasma.Type: ApplicationFiled: September 28, 2010Publication date: August 16, 2012Applicant: TOKYO ELECTRON LIMITEDInventors: Minoru Honda, Masayuki Kohno, Toshio Nakanishi
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Publication number: 20120178268Abstract: A plasma processing apparatus generates plasma by introducing microwaves into a processing chamber by using a planar antenna having a plurality of slots. By using the plasma processing apparatus, a nitrogen containing gas and a silicon containing gas introduced into the processing chamber are brought into the plasma state, and at the time of depositing by using the plasma a silicon nitride film on the surface of the a substrate to be processed, stress to the silicon nitride film to be formed is controlled by the combination of the type and the processing pressure of the nitrogen containing gas.Type: ApplicationFiled: March 19, 2012Publication date: July 12, 2012Applicant: TOKYO ELECTRON LIMITEDInventors: Masayuki KOHNO, Tatsuo NISHITA, Toshio NAKANISHI
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Publication number: 20120153442Abstract: Provided is a process of forming a silicon nitride film having concentration of hydrogen atoms below or equal to 9.9×1020 atoms/cm3 in the silicon nitride film by using a plasma CVD device, which generates plasma by introducing microwaves into a process chamber by using a planar antenna having a plurality of apertures, by setting the pressure inside a process chamber within a range from 0.1 Pa to 6.7 Pa and by performing a plasma CVD by using a raw material gas for film formation including SiCl4 gas and nitrogen gas.Type: ApplicationFiled: June 20, 2011Publication date: June 21, 2012Applicant: TOKYO ELECTRON LIMITEDInventors: Minoru Honda, Masayuki Kohno
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Publication number: 20120126376Abstract: To produce a silicon dioxide film having concentration of hydrogen atoms below or equal to 9.9×1020 atoms/cm3 in the silicon dioxide film, as measured by using secondary ion mass spectrometry (SIMS), a plasma CVD, which generate plasma by introducing microwaves into a process chamber by using a planar antenna having a plurality of apertures and forms a film, is performed by setting the pressure inside the process chamber within a range from 0.1 Pa to 6.7 Pa and by using a gas of a compound composed of silicon atoms and chlorine atoms and an oxygen containing gas.Type: ApplicationFiled: September 29, 2009Publication date: May 24, 2012Applicant: TOKYO ELECTRON LIMITEDInventors: Minoru Honda, Toshio Nakanishi, Masayuki Kohno, Junya Miyahara
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Patent number: 8138103Abstract: A plasma processing apparatus generates plasma by introducing microwaves into a processing chamber by using a planar antenna having a plurality of slots. By using the plasma processing apparatus, a nitrogen containing gas and a silicon containing gas introduced into the processing chamber are brought into the plasma state, and at the time of depositing by using the plasma a silicon nitride film on the surface of the a substrate to be processed, stress to the silicon nitride film to be formed is controlled by the combination of the type and the processing pressure of the nitrogen containing gas.Type: GrantFiled: May 30, 2007Date of Patent: March 20, 2012Assignee: Tokyo Electron LimitedInventors: Masayuki Kohno, Tatsuo Nishita, Toshio Nakanishi
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Patent number: 8124484Abstract: To manufacture a MOS memory device having a dielectric film laminate in which adjacent dielectric films have band-gaps of different magnitudes, a plasma processing device which transmits microwaves to a chamber by means of a planar antenna having a plurality of holes is used to perform plasma CVD under pressure conditions that differ from at least pressure conditions used when forming the adjacent dielectric films, and the dielectric films are sequentially formed by altering the band-gaps of the adjacent dielectric films that constitute the dielectric film laminate.Type: GrantFiled: March 30, 2009Date of Patent: February 28, 2012Assignees: Tohoku University, Tokyo Electron LimitedInventors: Tetsuo Endoh, Masayuki Kohno, Syuichiro Otao, Minoru Honda, Toshio Nakanishi
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Patent number: 8119545Abstract: Provided is a plasma CVD device. In the plasma CVD device, in producing a silicon nitride film while controlling the size of a band gap by CVD, microwaves are introduced into a treatment vessel by a flat antenna having a plurality of holes. The plasma CVD is carried out under a given treatment pressure selected from a pressure range of not less than 0.1 Pa and not more than 1333 Pa at a flow ratio between a silicon-containing compound gas and a nitrogen gas (silicon-containing compound gas flow rate/nitrogen gas flow rate) selected from a range of not less than 0.005 and not more than 0.2, whereby the Si/N ratio in the film is controlled to form a silicon nitride film having a band gap size of not less than 2.5 eV and not more than 7 eV.Type: GrantFiled: March 30, 2009Date of Patent: February 21, 2012Assignee: Tokyo Electron LimitedInventors: Minoru Honda, Toshio Nakanishi, Masayuki Kohno, Tatsuo Nishita, Junya Miyahara
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Patent number: 8114790Abstract: A plasma processing apparatus includes a process chamber configured to be vacuum-exhausted; a worktable configured to place a target substrate thereon inside the process chamber; a microwave generation source configured to generate microwaves; a planar antenna including a plurality of slots and configured to supply microwaves generated by the microwave generation source through the slots into the process chamber; a gas supply mechanism configured to supply a film formation source gas into the process chamber; and an RF power supply configured to apply an RF power to the worktable. The apparatus is preset to turn a nitrogen-containing gas and a silicon-containing gas supplied in the process chamber into plasma by the microwaves, and to deposit a silicon nitride film on a surface of the target substrate by use of the plasma, while applying the RF power to the worktable.Type: GrantFiled: May 30, 2007Date of Patent: February 14, 2012Assignee: Tokyo Electron LimitedInventors: Masayuki Kohno, Tatsuo Nishita, Toshio Nakanishi
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Publication number: 20120003299Abstract: Disclosed is a substance which is not accumulated stably in cells, does not cause the dysfunction of normal cells, and so on, and therefore can be used as an anti-cancer agent or in a DDS without having any adverse side effects. It is found that Hsp90 alone cannot exhibit its function as a chaperone in assisting the refolding of a protein such as survivin, but can exhibit this function when Hop (which is one of the partner proteins of Hsp90) binds to Hsp90. Thus, specifically disclosed herein is a chimeric peptide comprising of an Hsp90 TPR domain binding peptide and a cell-penetrating peptide.Type: ApplicationFiled: November 13, 2009Publication date: January 5, 2012Applicant: KYOTO UNIVERSITYInventors: Koji Kawakami, Masayuki Kohno, Tomohisa Horibe
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Publication number: 20110319336Abstract: It is an object of the present invention to provide a substance usable as an anticancer agent or DDS, which has intracellular stability, which is capable of evading side effects from functional disorder with respect to normal cells, or which has instantaneous effect. The inventors developed a novel chimeric peptide targeting cancer cells which overexpress EGFR or the like using a binding peptide such as a peptide sequence binding to EGFR, and a lytic peptide sequence, thereby solving such an object. Particularly, by using a chimeric peptide including an EGF receptor-binding peptide or the like and a cytotoxic peptide, this object was solved.Type: ApplicationFiled: December 3, 2009Publication date: December 29, 2011Applicant: UPSTREAM INFINITY, INC.Inventors: Koji Kawakami, Masayuki Kohno, Tomohisa Horibe, Oumi Nakajima, Mari Haramoto, Liying Yang
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Publication number: 20110254078Abstract: Provided is a method for depositing a silicon nitride film in a plasma CVD device which introduces microwaves into a process chamber by a planar antenna having a plurality of apertures, and the method including setting the pressure in the process chamber within a range from 10 Pa to 133.3 Pa and performing plasma CVD by using film formation gas including a silicon containing compound gas and a nitrogen gas while applying an RF bias to the wafer by supplying high-frequency power with an output density within a range from 0.009 W/cm2 to 0.64 W/cm2 per unit area of a wafer from a high frequency power supply to an electrode in a holding stage on which the wafer is arranged.Type: ApplicationFiled: June 20, 2011Publication date: October 20, 2011Applicant: TOKYO ELECTRON LIMITEDInventors: Minoru HONDA, Masayuki KOHNO
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Publication number: 20110206590Abstract: To form a dense high-quality silicon oxide film (SiO2 film or SiON film) having excellent insulating properties and an etching rate below or equal to 0.11 nm/s when using a 0.5% dilute hydrofluoric acid solution, plasma CVD is performed by setting a pressure within the processing container in the range from 0.1 Pa to 6.7 Pa. and using a process gas containing an SiCl4 gas or an Si2H6 gas, and an oxygen gas, in a plasma CVD apparatus in which plasma is generated by introducing microwaves into a processing container through a planar antenna having a plurality of holes.Type: ApplicationFiled: September 30, 2009Publication date: August 25, 2011Applicant: TOKYO ELECTRON LIMITEDInventors: Minoru Honda, Toshio Nakanishi, Masayuki Kohno, Junya Miyahara
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Publication number: 20110189862Abstract: Provided is a process of forming a silicon oxynitride film having concentration of hydrogen atoms below or equal to 9.9×1020 atoms/cm3 as measured by using secondary ion mass spectrometry (SIMS), using a plasma CVD device, which generates plasma by introducing microwaves into a process chamber by using a planar antenna having a plurality of apertures, by setting a pressure inside the process chamber within a range from 0.1 Pa to 6.7 Pa, and performing plasma CVD by using process gases including SiCl4 gas, nitrogen gas, and oxygen gas.Type: ApplicationFiled: September 29, 2009Publication date: August 4, 2011Applicant: TOKYO ELECTRON LIMITEDInventors: Minoru Honda, Tatsuo Nishita, Junya Miyahara, Masayuki Kohno
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Publication number: 20110086485Abstract: To manufacture a MOS semiconductor memory device having an insulating film laminate in which adjacent insulating films have band-gaps of different sizes, a plasma processing device which transmits microwaves to a chamber by means of a planar antenna having a plurality of holes is used to perform plasma CVD under pressure conditions that differ from at least pressure conditions used when forming the adjacent insulating films, and the insulating films are sequentially formed by altering the band-gaps of the adjacent insulating films that constitute the insulating film laminate.Type: ApplicationFiled: March 30, 2009Publication date: April 14, 2011Applicants: TOKYO ELECTRON LIMITED, TOHOKU UNIVERSITYInventors: Tetsuo Endoh, Masayuki Kohno, Syuichiro Otao, Minoru Honda, Toshio Nakanishi
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Publication number: 20110086517Abstract: Disclosed is a plasma CVD device. In the plasma CVD device, in producing a silicon nitride film while controlling the size of a band gap by CVD, microwaves are introduced into a treatment vessel by a flat antenna having a plurality of holes. The plasma CVD is carried out under a given treatment pressure selected from a pressure range of not less than 0.1 Pa and not more than 1333 Pa at a flow ratio between a silicon-containing compound gas and a nitrogen gas (silicon-containing compound gas flow rate/nitrogen gas flow rate) selected from a range of not less than 0.005 and not more than 0.2, whereby the Si/N ratio in the film is controlled to form a silicon nitride film having a band gap size of not less than 2.5 eV and not more than 7 eV.Type: ApplicationFiled: March 30, 2009Publication date: April 14, 2011Applicant: TOKYO ELECTRON LIMITEDInventors: Minoru Honda, Toshio Nakanishi, Masayuki Kohno, Tatsuo Nishita, Junya Miyahara
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Publication number: 20100283097Abstract: The invention provides a MOS semiconductor memory device that achieves excellent data retention characteristics while also achieving high-speed data write performance, low-power operation performance, and high reliability. A MOS semiconductor memory device 601 includes a first insulating film 111 and fifth insulating film 115 having large bandgaps 111a and 115a, a third insulating film 113 having the smallest bandgap 113a, and a second insulating film 112 and fourth insulating film 114 interposed between the third insulating film 113 and the first and fifth insulating films 111 and 115, respectively, and having intermediate bandgaps 112a and 114a.Type: ApplicationFiled: June 20, 2008Publication date: November 11, 2010Applicant: TOKYO ELECTRON LIMITEDInventors: Tetsuo Endoh, Masayuki Kohno, Tatsuo Nishita, Minoru Honda, Toshio Nakanishi, Yoshihiro Hirota
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Patent number: 7771796Abstract: A plasma processing method of carrying out curing processing on a low dielectric constant film produced on a to-be-processed substrate by applying plasma thereto in a processing chamber of a plasma processing apparatus, includes the steps of: a) introducing, in the plasma processing chamber, a first gas having a function of stabilizing plasma and a second gas generating active hydrogen, and, after that; b) generating plasma, and carrying out curing processing on the low dielectric constant film.Type: GrantFiled: November 4, 2005Date of Patent: August 10, 2010Assignee: Tokyo Electron LimitedInventors: Masayuki Kohno, Masaru Sasaki
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Patent number: 7763551Abstract: Film thickness uniformity and stoichiometry are controlled and deposition rate is increased in the chemical vapor deposition (CVD) of silicon nitride from complex gas mixtures in microwave plasmas. In Si2H6+NH3+Ar gas mixtures using a radial line slot antenna (RLSA) microwave plasma to deposit SiN by CVD, deposition rate and film uniformity are improved by limiting the amounts of atomic or molecular hydrogen from the gas mixture during the deposition process. A halogen, for example, fluorine, is added to a gas mixture of silane or disilane, ammonia and argon. The halogen scavenges hydrogen from the mixture, and prevents the hydrogen from blocking the nitrogen and silicon atoms and their fragments from bonding to the surface atoms and to grow stoichiometric silicon nitride. Adding the halogen generates free halogen radicals that react with hydrogen to create hydrogen halide, for example, HF or HCl, thereby scavenging the hydrogen.Type: GrantFiled: March 31, 2008Date of Patent: July 27, 2010Assignee: Tokyo Electron LimitedInventors: Jozef Brcka, Song Yun Kang, Toshio Nakanishi, Peter L. G. Ventzek, Minoru Honda, Masayuki Kohno
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Publication number: 20100140683Abstract: Provided is a silicon nitride film which has an excellent charge storage capacity and thus is useful as a charge storage layer of a semiconductor memory device. The silicon nitride film having substantially uniform trap density in the film thickness direction has high charge storage performance. The silicon nitride film is formed by plasma CVD by using a plasma processing apparatus (100), wherein microwaves are introduced into a chamber (1) by a plane antenna having a plurality of holes, plasma is generated by the microwaves while a source gas including nitrogen-containing compound and silicon-containing compound is introduced into the chamber (1), and the silicon nitride film is deposited on the surface of a processing object by the plasma.Type: ApplicationFiled: March 26, 2008Publication date: June 10, 2010Applicants: TOKYO ELECTRON LIMITED, HIROSHIMA UNIVERSITYInventors: Seiichi Miyazaki, Masayuki Kohno, Tatsuo Nishita, Toshio Nakanishi, Yoshihiro Hirota
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Publication number: 20100052040Abstract: A Plasma processing apparatus (100) introduces microwaves into a chamber (1) by a plane antenna (31) which has a plurality of holes. A material gas, which contains a nitrogen-containing compound and a silicon-containing compound, is introduced into the chamber (1) by using the plasma processing apparatus, and plasma is generated by the microwaves. Then, a silicon nitride film is deposited by the plasma on a surface of an object to be processed. The trap density of the silicon nitride film is controlled by adjusting the conditions of the plasma CVD process.Type: ApplicationFiled: March 25, 2008Publication date: March 4, 2010Applicant: Tokyo Electron LimitedInventors: Masayuki Kohno, Tatsuo Nishita, Toshio Nakanishi, Yoshihiro Hirota