Patents by Inventor Akihiro Isozaki
Akihiro Isozaki 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: 9252330Abstract: A semiconductor light-emitting element according to the present invention includes: an n-type nitride semiconductor layer 21; a p-type nitride semiconductor layer 23; an active layer region 22 which includes an m plane nitride semiconductor layer and which is interposed between the n-type nitride semiconductor layer and the p-type nitride semiconductor layer; an n-type electrode 30 which is electrically connected to the n-type nitride semiconductor layer; a p-type electrode 40 which is electrically connected to the p-type nitride semiconductor layer; a light-emitting face, through which polarized light that has been produced in the active layer region is extracted out of this element; and a striped structure 50 which is provided for the light-emitting face and which has a plurality of projections that run substantially parallel to the a-axis direction of the m plane nitride semiconductor layer.Type: GrantFiled: August 5, 2011Date of Patent: February 2, 2016Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Akihiro Isozaki, Akira Inoue, Atsushi Yamada, Toshiya Yokogawa
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Patent number: 8933543Abstract: A nitride-based semiconductor device of the present invention includes: a nitride-based semiconductor multilayer structure 20 which includes a p-type semiconductor region with a surface 12 being inclined from the m-plane by an angle of not less than 1° and not more than 5°; and an electrode 30 provided on the p-type semiconductor region. The p-type semiconductor region is formed by an AlxInyGazN (where x+y+z=1, x?0, y?0, and z?0) layer 26. The electrode 30 includes a Mg layer 32 and an Ag layer 34 provided on the Mg layer 32. The Mg layer 32 is in contact with the surface 12 of the p-type semiconductor region of the semiconductor multilayer structure 20.Type: GrantFiled: March 15, 2011Date of Patent: January 13, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Toshiya Yokogawa, Mitsuaki Oya, Atsushi Yamada, Akihiro Isozaki
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Publication number: 20130126902Abstract: A semiconductor light-emitting element according to the present invention includes: an n-type nitride semiconductor layer 21; a p-type nitride semiconductor layer 23; an active layer region 22 which includes an m plane nitride semiconductor layer and which is interposed between the n-type nitride semiconductor layer and the p-type nitride semiconductor layer; an n-type electrode 30 which is electrically connected to the n-type nitride semiconductor layer; a p-type electrode 40 which is electrically connected to the p-type nitride semiconductor layer; a light-emitting face, through which polarized light that has been produced in the active layer region is extracted out of this element; and a striped structure 50 which is provided for the light-emitting face and which has a plurality of projections that run substantially parallel to the a-axis direction of the m plane nitride semiconductor layer.Type: ApplicationFiled: August 5, 2011Publication date: May 23, 2013Applicant: Panasonic CorporationInventors: Akihiro Isozaki, Akira Inoue, Atsushi Yamada, Toshiya Yokogawa
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Publication number: 20130126901Abstract: A semiconductor light-emitting element according to the present invention includes: an n-type nitride semiconductor layer 21; a p-type nitride semiconductor layer 23; an active layer region 22 which includes an m-plane nitride semiconductor layer and which is interposed between the n- and p-type nitride semiconductor layers; an n-type electrode 30 which is electrically connected to the n-type nitride semiconductor layer; a p-type electrode 40 which is electrically connected to the p-type nitride semiconductor layer; a light-emitting face, through which polarized light that has been produced in the active layer region is extracted out of this element; and a striped structure 50 which is provided for the light-emitting face and which has a plurality of projections that run in a direction that defines either an angle of 5 degrees to 80 degrees or an angle of ?80 degrees to ?5 degrees with respect to the a-axis direction of the m-plane nitride semiconductor layer.Type: ApplicationFiled: August 5, 2011Publication date: May 23, 2013Applicant: PANASONIC CORPORATIONInventors: Akihiro Isozaki, Akira Inoue, Atsushi Yamada, Toshiya Yokogawa
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Patent number: 8441108Abstract: A nitride-based semiconductor light-emitting device 100 includes: a GaN substrate 10 with an m-plane surface 12; a semiconductor multilayer structure 20 provided on the m-plane surface 12 of the GaN substrate 10; and an electrode 30 provided on the semiconductor multilayer structure 20. The electrode 30 includes a Zn layer 32 and a metal layer 34 provided on the Zn layer 32. The Zn layer 32 is in contact with a surface of a p-type semiconductor region of the semiconductor multilayer structure 20.Type: GrantFiled: March 16, 2010Date of Patent: May 14, 2013Assignee: Panasonic CorporationInventors: Mitsuaki Oya, Toshiya Yokogawa, Atsushi Yamada, Akihiro Isozaki
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Publication number: 20130015427Abstract: A nitride-based semiconductor light-emitting device 100 includes: a GaN substrate 10 with an m-plane surface 12; a semiconductor multilayer structure 20 provided on the m-plane surface 12 of the GaN substrate 10; and an electrode 30 provided on the semiconductor multilayer structure 20. The electrode 30 includes an Mg layer 32 and an Ag layer 34 provided on the Mg layer 32. The Mg layer 32 is in contact with a surface of a p-type semiconductor region of the semiconductor multilayer structure 20.Type: ApplicationFiled: September 14, 2012Publication date: January 17, 2013Applicant: PANASONIC CORPORATIONInventors: Mitsuaki OYA, Toshiya YOKOGAWA, Atsushi YAMADA, Akihiro ISOZAKI
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Publication number: 20130001513Abstract: A nitride-based semiconductor device includes: a semiconductor multilayer structure 20 including a p-type GaN-based semiconductor region whose surface 12 is inclined by an angle of not less than 1° and not more than 5° or the principal surface has a plurality of m-plane steps; and an electrode 30 that is provided on the p-type semiconductor region. The p-type semiconductor region is made of an AlxInyGazN (where x+y+z=1, x?0, y?0, and z?0) layer 26. The electrode 30 includes a Zn layer 32, and the Zn layer 32 is in contact with the surface of the p-type semiconductor region of the semiconductor multilayer structure 20.Type: ApplicationFiled: September 11, 2012Publication date: January 3, 2013Applicant: PANASONIC CORPORATIONInventors: Toshiya YOKOGAWA, Mitsuaki OYA, Atsushi YAMADA, Akihiro ISOZAKI
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Publication number: 20120326161Abstract: An exemplary nitride-based semiconductor device includes: a semiconductor multilayer structure 20 which includes a p-type semiconductor region with a surface 12 being inclined from the m-plane by an angle of not less than 1° and not more than 5° or the principal surface has a plurality of m-plane steps; and an electrode 30 provided on the p-type semiconductor region. The p-type semiconductor region is formed by an AlxInyGazN (where x+y+z=1, x?0, y?0, and z>0) layer 26. The electrode 30 includes a Zn layer 32 and a Ag layer 34 provided on the Zn layer 32. The Zn layer is in contact with the surface 12 of the p-type semiconductor region of the semiconductor multilayer structure 20.Type: ApplicationFiled: August 29, 2012Publication date: December 27, 2012Applicant: PANASONIC CORPORATIONInventors: Toshiya YOKOGAWA, Mitsuaki OYA, Atsushi YAMADA, Akihiro ISOZAKI
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Patent number: 8334199Abstract: A nitride-based semiconductor light-emitting device 100 includes: a GaN substrate 10 with an m-plane surface 12; a semiconductor multilayer structure 20 provided on the m-plane surface 12 of the GaN substrate 10; and an electrode 30 provided on the semiconductor multilayer structure 20. The electrode 30 includes a Zn layer 32 and an Ag layer 34 provided on the Zn layer 32. The Zn layer 32 is in contact with a surface of a p-type semiconductor region of the semiconductor multilayer structure 20.Type: GrantFiled: March 17, 2010Date of Patent: December 18, 2012Assignee: Panasonic CorporationInventors: Mitsuaki Oya, Toshiya Yokogawa, Atsushi Yamada, Akihiro Isozaki
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Patent number: 8318594Abstract: A nitride-based semiconductor light-emitting device 100 includes: a GaN substrate 10 with an m-plane surface 12; a semiconductor multilayer structure 20 provided on the m-plane surface 12 of the GaN substrate 10; and an electrode 30 provided on the semiconductor multilayer structure 20. The electrode 30 includes an Mg layer 32 and an Ag layer 34 provided on the Mg layer 32. The Mg layer 32 is in contact with a surface of a p-type semiconductor region of the semiconductor multilayer structure 20.Type: GrantFiled: March 17, 2010Date of Patent: November 27, 2012Assignee: Panasonic CorporationInventors: Mitsuaki Oya, Toshiya Yokogawa, Atsushi Yamada, Akihiro Isozaki
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Patent number: 8304802Abstract: A nitride-based semiconductor light-emitting device 100 includes: a GaN substrate 10 with an m-plane surface 12; a semiconductor multilayer structure 20 provided on the m-plane surface 12 of the GaN substrate 10; and an electrode 30 provided on the semiconductor multilayer structure 20. The electrode 30 includes a Zn layer 32 and an Ag layer 34 provided on the Zn layer 32. The Zn layer 32 is in contact with a surface of a p-type semiconductor region of the semiconductor multilayer structure 20.Type: GrantFiled: June 23, 2011Date of Patent: November 6, 2012Assignee: Panasonic CorporationInventors: Mitsuaki Oya, Toshiya Yokogawa, Atsushi Yamada, Akihiro Isozaki
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Patent number: 8299490Abstract: A nitride-based semiconductor light-emitting device 100 includes: a GaN substrate 10 with an m-plane surface 12; a semiconductor multilayer structure 20 provided on the m-plane surface 12 of the GaN substrate 10; and an electrode 30 provided on the semiconductor multilayer structure 20. The electrode 30 includes an Mg layer 32 and an Ag layer 34 provided on the Mg layer 32. The Mg layer 32 is in contact with a surface of a p-type semiconductor region of the semiconductor multilayer structure 20.Type: GrantFiled: June 23, 2011Date of Patent: October 30, 2012Assignee: Panasonic CorporationInventors: Mitsuaki Oya, Toshiya Yokogawa, Atsushi Yamada, Akihiro Isozaki
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Publication number: 20120211725Abstract: A nitride-based semiconductor device of the present invention includes: a nitride-based semiconductor multilayer structure 20 which includes a p-type semiconductor region with a surface 12 being inclined from the m-plane by an angle of not less than 1° and not more than 5°; and an electrode 30 provided on the p-type semiconductor region. The p-type semiconductor region is formed by an AlxInyGazN (where x+y+z=1, x?0, y?0, and z?0) layer 26. The electrode 30 includes a Mg layer 32 and an Ag layer 34 provided on the Mg layer 32. The Mg layer 32 is in contact with the surface 12 of the p-type semiconductor region of the semiconductor multilayer structure 20.Type: ApplicationFiled: March 15, 2011Publication date: August 23, 2012Applicant: Panasonic CorporationInventors: Toshiya Yokogawa, Mitsuaki Oya, Atsushi Yamada, Akihiro Isozaki
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Patent number: 8164109Abstract: A nitride-based semiconductor light-emitting device 100 includes: a GaN substrate 10 with an m-plane surface 12; a semiconductor multilayer structure 20 provided on the m-plane surface 12 of the GaN substrate 10; and an electrode 30 provided on the semiconductor multilayer structure 20. The electrode 30 includes a Zn layer 32 and a metal layer 34 provided on the Zn layer 32. The Zn layer 32 is in contact with a surface of a p-type semiconductor region of the semiconductor multilayer structure 20.Type: GrantFiled: June 23, 2011Date of Patent: April 24, 2012Assignee: Panasonic CorporationInventors: Mitsuaki Oya, Toshiya Yokogawa, Atsushi Yamada, Akihiro Isozaki
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Publication number: 20110253977Abstract: A nitride-based semiconductor light-emitting device 100 includes: a GaN substrate 10 with an m-plane surface 12; a semiconductor multilayer structure 20 provided on the m-plane surface 12 of the GaN substrate 10; and an electrode 30 provided on the semiconductor multilayer structure 20. The electrode 30 includes a Zn layer 32 and an Ag layer 34 provided on the Zn layer 32. The Zn layer 32 is in contact with a surface of a p-type semiconductor region of the semiconductor multilayer structure 20.Type: ApplicationFiled: June 23, 2011Publication date: October 20, 2011Applicant: PANASONIC CORPORATIONInventors: Mitsuaki OYA, Toshiya YOKOGAWA, Atsushi YAMADA, Akihiro ISOZAKI
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Publication number: 20110253976Abstract: A nitride-based semiconductor light-emitting device 100 includes: a GaN substrate 10 with an m-plane surface 12; a semiconductor multilayer structure 20 provided on the m-plane surface 12 of the GaN substrate 10; and an electrode 30 provided on the semiconductor multilayer structure 20. The electrode 30 includes an Mg layer 32 and an Ag layer 34 provided on the Mg layer 32. The Mg layer 32 is in contact with a surface of a p-type semiconductor region of the semiconductor multilayer structure 20.Type: ApplicationFiled: June 23, 2011Publication date: October 20, 2011Applicant: PANASONIC CORPORATIONInventors: Mitsuaki OYA, Toshiya YOKOGAWA, Atsushi YAMADA, Akihiro ISOZAKI
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Publication number: 20110248307Abstract: A nitride-based semiconductor light-emitting device 100 includes: a GaN substrate 10 with an m-plane surface 12; a semiconductor multilayer structure 20 provided on the m-plane surface 12 of the GaN substrate 10; and an electrode 30 provided on the semiconductor multilayer structure 20. The electrode 30 includes a Zn layer 32 and a metal layer 34 provided on the Zn layer 32. The Zn layer 32 is in contact with a surface of a p-type semiconductor region of the semiconductor multilayer structure 20.Type: ApplicationFiled: June 23, 2011Publication date: October 13, 2011Applicant: PANASONIC CORPORATIONInventors: Mitsuaki OYA, Toshiya YOKOGAWA, Atsushi YAMADA, Akihiro ISOZAKI
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Publication number: 20110101372Abstract: A nitride-based semiconductor light-emitting device 100 includes: a GaN substrate 10 with an m-plane surface 12; a semiconductor multilayer structure 20 provided on the m-plane surface 12 of the GaN substrate 10; and an electrode 30 provided on the semiconductor multilayer structure 20. The electrode 30 includes a Zn layer 32 and a metal layer 34 provided on the Zn layer 32. The Zn layer 32 is in contact with a surface of a p-type semiconductor region of the semiconductor multilayer structure 20.Type: ApplicationFiled: March 16, 2010Publication date: May 5, 2011Inventors: Mitsuaki Oya, Toshiya Yokogawa, Atsushi Yamada, Akihiro Isozaki
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Publication number: 20110037088Abstract: A nitride-based semiconductor light-emitting device 100 includes: a GaN substrate 10 with an m-plane surface 12; a semiconductor multilayer structure 20 provided on the m-plane surface 12 of the GaN substrate 10; and an electrode 30 provided on the semiconductor multilayer structure 20. The electrode 30 includes an Mg layer 32 and an Ag layer 34 provided on the Mg layer 32. The Mg layer 32 is in contact with a surface of a p-type semiconductor region of the semiconductor multilayer structure 20.Type: ApplicationFiled: March 17, 2010Publication date: February 17, 2011Inventors: Mitsuaki Oya, Toshiya Yokogawa, Atsushi Yamada, Akihiro Isozaki
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Publication number: 20110037089Abstract: A nitride-based semiconductor light-emitting device 100 includes: a GaN substrate 10 with an m-plane surface 12; a semiconductor multilayer structure 20 provided on the m-plane surface 12 of the GaN substrate 10; and an electrode 30 provided on the semiconductor multilayer structure 20. The electrode 30 includes a Zn layer 32 and an Ag layer 34 provided on the Zn layer 32. The Zn layer 32 is in contact with a surface of a p-type semiconductor region of the semiconductor multilayer structure 20.Type: ApplicationFiled: March 17, 2010Publication date: February 17, 2011Inventors: Mitsuaki Oya, Toshiya Yokogawa, Atsushi Yamada, Akihiro Isozaki