Patents by Inventor Masato Toita
Masato Toita 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: 11942569Abstract: In various embodiments, degradation of epoxy within packages for ultraviolet light-emitting devices is reduced or substantially eliminated via package venting, prevention of transmission of ultraviolet light to one or more regions of epoxy utilized in the package, and/or utilization of packaging schemes that reduce or avoid utilization of epoxy and/or specific metals.Type: GrantFiled: January 31, 2018Date of Patent: March 26, 2024Assignee: CRYSTAL IS, INC.Inventors: Masato Toita, Satoshi Yamada, Ken Kitamura, Craig Moe, Amy Miller
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Patent number: 11515455Abstract: In various embodiments, a layer of organic encapsulant is provided over a surface of an ultraviolet (UV) light-emitting semiconductor die, and at least a portion of the encapsulant is exposed to UV light to convert at least some of said portion of the encapsulant into non-stoichiometric silica material. The non-stoichiometric silica material includes silicon, oxygen, and carbon, and a carbon content of the non-stoichiometric silica material is greater than 1 ppm and less than 40 atomic percent.Type: GrantFiled: October 29, 2020Date of Patent: November 29, 2022Assignee: CRYSTAL IS, INC.Inventors: Ken Kitamura, Masato Toita, Hironori Ishii, Yuting Wang, Leo J. Schowalter, Jianfeng Chen, James R. Grandusky
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Patent number: 11249015Abstract: A chemical measurement device for determining the concentration of given chemical in a given fluid has at least one LED light source and at least one light detector. The given chemical has a light absorption curve with a peak, and the at least one LED light source and at least one light detector are configured to collaborate to produce two light signals having peak wavelengths between about 5 nm and 35 nm apart. The two light signal peak wavelengths are in the ultraviolet region with wavelengths beyond the light absorption curve peak. The light signal peak wavelengths, however, also are before the light absorption curve is negligible. The device also has a concentration calculator operatively coupled with the at least one light detector. The concentration calculator is configured to compare the two light signals to produce a concentration signal representing the concentration of the given chemical in the given fluid.Type: GrantFiled: June 5, 2020Date of Patent: February 15, 2022Assignee: Crystal IS, Inc.Inventors: Masato Toita, James Davis
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Publication number: 20210111317Abstract: In various embodiments, a layer of organic encapsulant is provided over a surface of an ultraviolet (UV) light-emitting semiconductor die, and at least a portion of the encapsulant is exposed to UV light to convert at least some of said portion of the encapsulant into non-stoichiometric silica material. The non-stoichiometric silica material includes silicon, oxygen, and carbon, and a carbon content of the non-stoichiometric silica material is greater than 1 ppm and less than 40 atomic percent.Type: ApplicationFiled: October 29, 2020Publication date: April 15, 2021Inventors: Ken KITAMURA, Masato TOITA, Hironori ISHII, Yuting WANG, Leo J. SCHOWALTER, Jianfeng CHEN, James R. GRANDUSKY
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Publication number: 20200386675Abstract: A chemical measurement device for determining the concentration of given chemical in a given fluid has at least one LED light source and at least one light detector. The given chemical has a light absorption curve with a peak, and the at least one LED light source and at least one light detector are configured to collaborate to produce two light signals having peak wavelengths between about 5 nm and 35 nm apart. The two light signal peak wavelengths are in the ultraviolet region with wavelengths beyond the light absorption curve peak. The light signal peak wavelengths, however, also are before the light absorption curve is negligible. The device also has a concentration calculator operatively coupled with the at least one light detector. The concentration calculator is configured to compare the two light signals to produce a concentration signal representing the concentration of the given chemical in the given fluid.Type: ApplicationFiled: June 5, 2020Publication date: December 10, 2020Inventors: Masato Toita, James Davis
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Patent number: 10854797Abstract: In various embodiments, a layer of organic encapsulant is provided over a surface of an ultraviolet (UV) light-emitting semiconductor die, and at least a portion of the encapsulant is exposed to UV light to convert at least some of said portion of the encapsulant into non-stoichiometric silica material. The non-stoichiometric silica material includes silicon, oxygen, and carbon, and a carbon content of the non-stoichiometric silica material is greater than 1 ppm and less than 40 atomic percent.Type: GrantFiled: May 24, 2019Date of Patent: December 1, 2020Assignee: CRYSTALIS, INC.Inventors: Ken Kitamura, Masato Toita, Hironori Ishii, Yuting Wang, Leo J. Schowalter, Jianfeng Chen, James R. Grandusky
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Publication number: 20190348581Abstract: In various embodiments, a layer of organic encapsulant is provided over a surface of an ultraviolet (UV) light-emitting semiconductor die, and at least a portion of the encapsulant is exposed to UV light to convert at least some of said portion of the encapsulant into non-stoichiometric silica material. The non-stoichiometric silica material includes silicon, oxygen, and carbon, and a carbon content of the non-stoichiometric silica material is greater than 1 ppm and less than 40 atomic percent.Type: ApplicationFiled: May 24, 2019Publication date: November 14, 2019Inventors: Ken Kitamura, Masato Toita, Hironori Ishii, Yuting Wang, Leo J. Schowalter, Jianfeng Chen, James R. Grandusky
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Patent number: 10383963Abstract: In various embodiments, an illumination device features an ultraviolet (UV) light-emitting device at least partially surrounded by an encapsulant. A barrier layer is disposed between the light-emitting device and the encapsulant and is configured to substantially prevent UV light emitted by the light-emitting device from entering the encapsulant.Type: GrantFiled: December 8, 2016Date of Patent: August 20, 2019Assignee: CRYSTAL IS, INC.Inventors: Masato Toita, Jianfeng Chen, Yuxin Li, Yuting Wang, Hironori Ishii, Ken Kitamura
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Patent number: 10347805Abstract: In various embodiments, a layer of organic encapsulant is provided over a surface of an ultraviolet (UV) light-emitting semiconductor die, and at least a portion of the encapsulant is exposed to UV light to convert at least some of said portion of the encapsulant into non-stoichiometric silica material. The non-stoichiometric silica material includes silicon, oxygen, and carbon, and a carbon content of the non-stoichiometric silica material is greater than 1 ppm and less than 40 atomic percent.Type: GrantFiled: February 16, 2018Date of Patent: July 9, 2019Assignee: CRYSTAL IS, INC.Inventors: Ken Kitamura, Masato Toita, Hironori Ishii, Yuting Wang, Leo J. Schowalter, Jianfeng Chen, James R. Grandusky
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Publication number: 20180219124Abstract: In various embodiments, degradation of epoxy within packages for ultraviolet light-emitting devices is reduced or substantially eliminated via package venting, prevention of transmission of ultraviolet light to one or more regions of epoxy utilized in the package, and/or utilization of packaging schemes that reduce or avoid utilization of epoxy and/or specific metals.Type: ApplicationFiled: January 31, 2018Publication date: August 2, 2018Inventors: Masato TOITA, Satoshi YAMADA, Ken KITAMURA, Craig MOE, Amy MILLER
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Publication number: 20180190883Abstract: In various embodiments, a layer of organic encapsulant is provided over a surface of an ultraviolet (UV) light-emitting semiconductor die, and at least a portion of the encapsulant is exposed to UV light to convert at least some of said portion of the encapsulant into non-stoichiometric silica material. The non-stoichiometric silica material includes silicon, oxygen, and carbon, and a carbon content of the non-stoichiometric silica material is greater than 1 ppm and less than 40 atomic percent.Type: ApplicationFiled: February 16, 2018Publication date: July 5, 2018Inventors: Ken Kitamura, Masato Toita, Hironori Ishii, Yuting Wang, Leo J. Schowalter, Jianfeng Chen, James R. Grandusky
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Patent number: 9935247Abstract: In various embodiments, a layer of organic encapsulant is provided over a surface of an ultraviolet (UV) light-emitting semiconductor die, and at least a portion of the encapsulant is exposed to UV light to convert at least some of said portion of the encapsulant into non-stoichiometric silica material. The non-stoichiometric silica material includes silicon, oxygen, and carbon, and a carbon content of the non-stoichiometric silica material is greater than 1 ppm and less than 40 atomic percent.Type: GrantFiled: July 23, 2015Date of Patent: April 3, 2018Assignee: CRYSTAL IS, INC.Inventors: Ken Kitamura, Masato Toita, Hironori Ishii, Yuting Wang, Leo J. Schowalter, Jianfeng Chen, James R. Grandusky
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Publication number: 20170087262Abstract: In various embodiments, an illumination device features an ultraviolet (UV) light-emitting device at least partially surrounded by an encapsulant. A barrier layer is disposed between the light-emitting device and the encapsulant and is configured to substantially prevent UV light emitted by the light-emitting device from entering the encapsulant.Type: ApplicationFiled: December 8, 2016Publication date: March 30, 2017Inventors: Masato Toita, Jianfeng Chen, Yuxin Li, Yuting Wang, Hironori Ishii, Ken Kitamura
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Patent number: 9548431Abstract: In various embodiments, an illumination device features an ultraviolet (UV) light-emitting device at least partially surrounded by an encapsulant and having a rigid lens. Downward forces is applied while the encapsulant is at least partially cured to substantially prevent partial or full detachment of the rigid lens from the light-emitting device, and/or substantially suppress formation of bubbles between the light-emitting device and the rigid lens.Type: GrantFiled: February 16, 2016Date of Patent: January 17, 2017Assignee: CRYSTAL IS, INC.Inventors: Masato Toita, Jianfeng Chen, Yuxin Li, Yuting Wang, Hironori Ishii, Ken Kitamura
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Publication number: 20160172553Abstract: In various embodiments, an illumination device features an ultraviolet (UV) light-emitting device at least partially surrounded by an encapsulant. A barrier layer is disposed between the light-emitting device and the encapsulant and is configured to substantially prevent UV light emitted by the light-emitting device from entering the encapsulant.Type: ApplicationFiled: February 16, 2016Publication date: June 16, 2016Inventors: Masato Toita, Jianfeng Chen, Yuxin Li, Yuting Wang, Hironori Ishii, Ken Kitamura
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Patent number: 9293670Abstract: In various embodiments, an illumination device features an ultraviolet (UV) light-emitting device at least partially surrounded by an encapsulant. A barrier layer is disposed between the light-emitting device and the encapsulant and is configured to substantially prevent UV light emitted by the light-emitting device from entering the encapsulant.Type: GrantFiled: April 6, 2015Date of Patent: March 22, 2016Assignee: Crystal IS, Inc.Inventors: Masato Toita, Jianfeng Chen, Yuxin Li, Yuting Wang, Hironori Ishii, Ken Kitamura
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Publication number: 20160027975Abstract: In various embodiments, a layer of organic encapsulant is provided over a surface of an ultraviolet (UV) light-emitting semiconductor die, and at least a portion of the encapsulant is exposed to UV light to convert at least some of said portion of the encapsulant into non-stoichiometric silica material. The non-stoichiometric silica material includes silicon, oxygen, and carbon, and a carbon content of the non-stoichiometric silica material is greater than 1 ppm and less than 40 atomic percent.Type: ApplicationFiled: July 23, 2015Publication date: January 28, 2016Inventors: Ken Kitamura, Masato Toita, Hironori Ishii, Yuting Wang, Leo J. Schowalter, Jianfeng Chen, James R. Grandusky
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Publication number: 20150287894Abstract: In various embodiments, an illumination device features an ultraviolet (UV) light-emitting device at least partially surrounded by an encapsulant. A barrier layer is disposed between the light-emitting device and the encapsulant and is configured to substantially prevent UV light emitted by the light-emitting device from entering the encapsulant.Type: ApplicationFiled: April 6, 2015Publication date: October 8, 2015Inventors: Masato Toita, Jianfeng Chen, Yuxin Li, Yuting Wang, Hironori Ishii, Ken Kitamura