Patents by Inventor Hidehito Shimizu
Hidehito Shimizu 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: 10097159Abstract: An acoustic wave element comprising a lithium tantalate substrate having the Euler angles (?, ?, ?), a first component ? satisfying 10°???50°; and an electrode disposed on the lithium tantalate substrate and configured to excite a main acoustic wave of wavelength ?, the electrode having a density ?M satisfying ?M??Ti where ?Ti represents a density of titanium (Ti), and a thickness hM of the electrode satisfies 0.141×exp(0.075?M)??hM?0.134? Embodiments of the present disclosure minimize a thickness of the electrode and suppress a spurious Rayleigh wave signal.Type: GrantFiled: March 11, 2016Date of Patent: October 9, 2018Assignee: SKYWORKS FILTER SOLUTIONS JAPAN CO., LTD.Inventors: Tomoya Komatsu, Hidehito Shimizu, Joji Fujiwara, Tetsuya Tsurunari, Hiroyuki Nakamura
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Publication number: 20180041187Abstract: Examples are directed to suppressing crack development in a surface acoustic wave (SAW) element including a double-layered IDT electrode. In one example the SAW element includes a piezoelectric substrate, a comb-shaped electrode formed on a top surface of the piezoelectric substrate, and an insulation layer formed on the top surface of the piezoelectric substrate to cover the comb-shaped electrode. The comb-shaped electrode includes a plurality of electrode fingers each having a first metal layer of a first metal formed on the top surface of the piezoelectric substrate, a second metal layer of a second metal formed on the first metal layer, and a second protective film at least partially covering the second metal layer, the second metal layer being covered by the second protective film and the first metal layer.Type: ApplicationFiled: August 1, 2017Publication date: February 8, 2018Inventors: Yuji Yashiro, Hideki Yamabe, Hidehito Shimizu, Satoru Matsuda, Atsushi Nishimura, Hironori Fukuhara, Toru Yamaji
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Publication number: 20160268997Abstract: An acoustic wave element comprising a lithium tantalate substrate having the Euler angles (?, ?, ?), a first component ? satisfying 10°???50°; and an electrode disposed on the lithium tantalate substrate and configured to excite a main acoustic wave of wavelength ?, the electrode having a density ?M satisfying ?M??Ti where ?Ti represents a density of titanium (Ti), and a thickness hM of the electrode satisfies 0.141×exp(0.075?M)??hM?0.134? Embodiments of the present disclosure minimize a thickness of the electrode and suppress a spurious Rayleigh wave signal.Type: ApplicationFiled: March 11, 2016Publication date: September 15, 2016Inventors: Tomoya Komatsu, Hidehito Shimizu, Joji Fujiwara, Tetsuya Tsurunari, Hiroyuki Nakamura
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Patent number: 9413330Abstract: An object of the present disclosure is to provide an elastic wave resonator having a high Q value, and producing little or no unwanted spurious signals. In order to achieve the object, an elastic wave resonator according to the present disclosure includes a piezoelectric substrate and an IDT electrode. The IDT electrode has an apodization-weighting portion in which a staggered section width decreases toward an end portion of the IDT electrode in an elastic wave propagation direction. The electrode finger pitch of the IDT electrode decreases toward an end portion of the IDT electrode in an end portion, in the elastic wave propagation direction, of a staggered region of the IDT electrode.Type: GrantFiled: September 25, 2014Date of Patent: August 9, 2016Assignee: SKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO., LTD.Inventors: Hidehito Shimizu, Hiroyuki Nakamura
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Publication number: 20160226464Abstract: An acoustic wave element that includes a piezoelectric body, an aluminum oxide layer disposed on the piezoelectric body, an electrode disposed on the aluminum oxide layer, and a protection film disposed on the aluminum oxide layer to cover the electrode. The piezoelectric body is formed of a piezoelectric material based on lithium niobate having Euler angles (?, ?, ?). The aluminum oxide layer is formed of Al2O3. The electrode is configured to excite a main acoustic wave having a wavelength ?. The protection film has a film thickness greater than 0.27?. The Euler angles satisfy either ???2??3° or ?2?+3°?? and both of ?100°????60° and 2??2°???2?+2°.Type: ApplicationFiled: April 8, 2016Publication date: August 4, 2016Inventors: Joji Fujiwara, Yosuke Hamaoka, Tetsuya Tsurunari, Hidekazu Nakanishi, Hiroyuki Nakamura, Rei Goto, Hidehito Shimizu
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Publication number: 20160056791Abstract: An object of the present disclosure is to provide an elastic wave resonator having a high Q value, and producing little or no unwanted spurious signals. In order to achieve the object, an elastic wave resonator according to the present disclosure includes a piezoelectric substrate and an IDT electrode. The IDT electrode has an apodization-weighting portion in which a staggered section width decreases toward an end portion of the IDT electrode in an elastic wave propagation direction. The electrode finger pitch of the IDT electrode decreases toward an end portion of the IDT electrode in an end portion, in the elastic wave propagation direction, of a staggered region of the IDT electrode.Type: ApplicationFiled: September 25, 2014Publication date: February 25, 2016Inventors: HIDEHITO SHIMIZU, HIROYUKI NAKAMURA
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Patent number: 9124240Abstract: The present invention is an acoustic wave device including first and second acoustic wave resonators. A first tilt angle that is an angle formed between a direction perpendicular to a direction in which electrode fingers of the first acoustic wave resonator extend and a direction along which the electrode fingers are arranged is different from a second tilt angle that is an angle formed between a direction perpendicular to a direction in which electrode fingers of the second acoustic wave resonator extend and a direction along which the electrode fingers are arranged.Type: GrantFiled: March 12, 2012Date of Patent: September 1, 2015Assignee: SKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO., LTD.Inventors: Hidehito Shimizu, Hiroyuki Nakamura, Takahiro Sato
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Patent number: 9118302Abstract: In a filter module capable of handling multiple bands, cross wiring with an RF-IC is to be solved. The filter module includes: an antenna terminal; first and second transmission filters; first and second reception filters; a first switch circuit connected to the antenna terminal, and selectively connected to the first and second transmission filters; a second switch circuit connected to the antenna terminal, and selectively connected to the first and second reception filters; a first matching circuit connected between the first switch circuit and the first transmission filter or between the second switch circuit and the first reception filter; and a second matching circuit connected between the first switch circuit and the second transmission filter or between the second switch circuit and the second reception filter.Type: GrantFiled: August 7, 2012Date of Patent: August 25, 2015Assignee: SKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO., LTDInventors: Hidehito Shimizu, Hiroyuki Nakamura, Takahiro Sato, Tetsuya Tsurunari
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Publication number: 20140167877Abstract: In a filter module capable of handling multiple bands, cross wiring with an RF-IC is to be solved. The filter module includes: an antenna terminal; first and second transmission filters; first and second reception filters; a first switch circuit connected to the antenna terminal, and selectively connected to the first and second transmission filters; a second switch circuit connected to the antenna terminal, and selectively connected to the first and second reception filters; a first matching circuit connected between the first switch circuit and the first transmission filter or between the second switch circuit and the first reception filter; and a second matching circuit connected between the first switch circuit and the second transmission filter or between the second switch circuit and the second reception filter.Type: ApplicationFiled: August 7, 2012Publication date: June 19, 2014Applicant: Panasonic CorporationInventors: Hidehito Shimizu, Hiroyuki Nakamura, Takahiro Sato, Tetsuya Tsurunari
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Publication number: 20130099875Abstract: The present invention is an acoustic wave device including first and second acoustic wave resonators. A first tilt angle that is an angle formed between a direction perpendicular to a direction in which electrode fingers of the first acoustic wave resonator extend and a direction along which the electrode fingers are arranged is different from a second tilt angle that is an angle formed between a direction perpendicular to a direction in which electrode fingers of the second acoustic wave resonator extend and a direction along which the electrode fingers are arranged.Type: ApplicationFiled: March 12, 2012Publication date: April 25, 2013Inventors: Hidehito Shimizu, Hiroyuki Nakamura, Takahiro Sato
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Patent number: 8421307Abstract: An acoustic wave device includes a piezoelectric substrate, an interdigital transducer (IDT) electrode, a reflector electrode, and a dummy electrode. The IDT electrode includes electrode fingers extending in a predetermined direction. The reflector electrode faces the IDT electrode across a gap. The dummy electrode is situated on a straight line extending in the predetermined direction through the gap. At least one of the distance between the dummy electrode and the IDT electrode and the distance between the dummy electrode and the reflector electrode is larger than the distance between the IDT electrode and the reflector electrode. This acoustic wave device prevents a short circuit between the IDT electrode and the reflector electrode, thereby avoiding a decrease in its yield.Type: GrantFiled: August 10, 2011Date of Patent: April 16, 2013Assignee: Panasonic CorporationInventors: Shoji Okamoto, Takashi Inoue, Takahiro Sato, Rei Goto, Hidehito Shimizu, Toru Jibu
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Publication number: 20120049690Abstract: An acoustic wave device includes a piezoelectric substrate, an interdigital transducer (IDT) electrode, a reflector electrode, and a dummy electrode. The IDT electrode includes electrode fingers extending in a predetermined direction. The reflector electrode faces the IDT electrode across a gap. The dummy electrode is situated on a straight line extending in the predetermined direction through the gap. At least one of the distance between the dummy electrode and the IDT electrode and the distance between the dummy electrode and the reflector electrode is larger than the distance between the IDT electrode and the reflector electrode. This acoustic wave device prevents a short circuit between the IDT electrode and the reflector electrode, thereby avoiding a decrease in its yield.Type: ApplicationFiled: August 10, 2011Publication date: March 1, 2012Applicant: Panasonic CorporationInventors: Shoji Okamoto, Takashi Inoue, Takahiro Sato, Rei Goto, Hidehito Shimizu, Toru Jibu
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Publication number: 20080059917Abstract: An antenna manufacturing method including the step of inputting as variables shape of a case, position of an antenna in the case, shape of the antenna, position of antenna peripheral components in the case, and shape of the antenna peripheral components, and the step of computing optimum value of the variables by a simulation program. With this manufacturing method, radiation efficiency of the antenna and the communications device that uses it can be enhanced.Type: ApplicationFiled: April 12, 2006Publication date: March 6, 2008Inventors: Hidehito Shimizu, Kazunari Hiraide, Yukinori Sasaki, Mamoru Ito
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Publication number: 20050113952Abstract: A design method for an antenna which shortens the time for antenna design and greatly contributes to reduction in costs of antenna development, and an antenna using the same are provided. This design method for the antenna can design an optimum antenna matching with the configuration of a cellular telephone for a short time. This design method for the antenna uses a database prepared beforehand and a relational expression obtained from design parameters and characteristic parameters, and can obtain desired antenna characteristics for a short time.Type: ApplicationFiled: October 28, 2004Publication date: May 26, 2005Inventors: Hidehito Shimizu, Yukinori Sasaki, Yuki Satoh
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Patent number: D863844Type: GrantFiled: April 17, 2018Date of Patent: October 22, 2019Assignee: Sasagawa Co., Ltd.Inventor: Hidehito Shimizu