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公开(公告)号：US10714932B2
公开(公告)日：2020-07-14
申请号：US15375392
申请日：2016-12-12
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takahiro Sumi , Jun Adachi , Takayuki Tsukizawa , Katsumi Yasunaka , Sumiyo Nakamura , Mayu Suzuki
Abstract: An ESD protection device includes an insulating substrate, first and second discharge electrodes in contact with the insulating substrate, the first and second discharge electrodes separated from each other and opposing each other, first and second outer electrodes on an outside surface of the insulating substrate, the first outer electrode being electrically connected to the first discharge electrode and the second outer electrode being electrically connected to the second discharge electrode, and a discharge auxiliary electrode spanning the first discharge electrode and the second discharge electrode in a region where the discharge electrodes oppose each other. The discharge auxiliary electrode includes semiconductor particles and metal particles. An average particle diameter of the metal particles is about 0.3 μm to about 1.5 μm. A density of the metal particles is greater than or equal to about 20 particles/50 μm2 and the semiconductor particles include an oxygen-containing layer on surfaces of the semiconductor particles.
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公开(公告)号：US09681593B2
公开(公告)日：2017-06-13
申请号：US14608403
申请日：2015-01-29
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Jun Adachi , Jun Urakawa , Issei Yamamoto
CPC classification number: H02H9/04 , H01B1/20 , H01T4/10 , H01T4/12 , H01T21/00 , H02H9/044 , H05K9/0067 , H05K9/0069 , H05K9/0079 , Y10T29/49002
Abstract: An ESD protection device is manufactured such that its ESD characteristics are easily adjusted and stabilized. The ESD protection device includes an insulating substrate, a cavity provided in the insulating substrate, at least one pair of discharge electrodes each including a portion exposed in the cavity, the exposed portions being arranged to face each other, and external electrodes provided on a surface of the insulating substrate and connected to the at least one pair of discharge electrodes. A particulate supporting electrode material having conductivity is dispersed between the exposed portions of the at least one pair of discharge electrodes in the cavity.
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公开(公告)号：US20150155246A1
公开(公告)日：2015-06-04
申请号：US14615956
申请日：2015-02-06
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takayuki Tsukizawa , Jun Adachi , Takayuki Imada , Takahiro Sumi
CPC classification number: H01L23/60 , H01B1/14 , H01B1/16 , H01B1/18 , H01L23/49827 , H01L23/49866 , H01L2224/48091 , H01L2224/48227 , H01L2924/0002 , H01T1/22 , H01T4/10 , H05F3/04 , H05K1/026 , H05K3/4697 , H05K2201/09063 , H05K2201/0919 , H01L2924/00014 , H01L2924/00
Abstract: An ESD protection device 1 has a ceramic insulating material 10, first and second discharge electrodes 21 and 22, and a discharge-assisting section 51. The first and second discharge electrodes 21 and 22 are disposed somewhere of the ceramic insulating material 10. The discharge-assisting section 51 is located between the distal end portion of the first discharge electrode 21 and the distal end portion of the second discharge electrode 22. The discharge-assisting section 51 is an electrode configured to reduce the discharge starting voltage between the first discharge electrode 21 and the second discharge electrode 22. The discharge-assisting section 51 is made from a sintered body containing conductive particles and at least one of semiconductor particles and insulating particles. The first and second discharge electrodes contain at least one of the semiconductor material constituting the semiconductor particles and the insulating material constituting the insulating particles.
Abstract translation: ESD保护器件1具有陶瓷绝缘材料10，第一和第二放电电极21和22以及放电辅助部分51.第一和第二放电电极21和22设置在陶瓷绝缘材料10的某处。放电 辅助部51位于第一放电电极21的前端部与第二放电电极22的前端部之间。放电辅助部51是将第一放电电极 21和第二放电电极22.放电辅助部51由包含导电颗粒和半导体颗粒和绝缘颗粒中的至少一种的烧结体制成。 第一和第二放电电极包含构成半导体颗粒的半导体材料和构成绝缘颗粒的绝缘材料中的至少一个。
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公开(公告)号：US20140192447A1
公开(公告)日：2014-07-10
申请号：US14206339
申请日：2014-03-12
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takahiro Sumi , Jun Adachi , Takayuki Tsukizawa
CPC classification number: H01B3/08 , H01B19/04 , H01T1/20 , H01T4/12 , H01T21/00 , H02H9/04 , H05F3/04 , H05K1/0259 , H05K9/0079
Abstract: An ESD protection device having high insulation reliability and good discharge properties is provided. In producing an ESD protection device that includes a first discharge electrode and a second discharge electrode arranged to oppose each other, a discharge supporting electrode formed so as to span between the first and second discharge electrodes, and an insulator substrate that retains the first and second discharge electrodes and the discharge supporting electrode, a paste for forming a discharge supporting electrode is used and this paste contains, in addition to a powder of an alkali metal compound and/or an alkaline earth metal compound, a metal powder with a network-forming oxide adhered to particle surfaces, a metal powder and a semiconductor powder with a network-forming oxide adhered to particle surfaces, or a metal powder with a network-forming oxide adhered to particle surfaces and a semiconductor powder with a network-forming oxide adhered to particle surfaces.
Abstract translation: 提供具有高绝缘可靠性和良好放电特性的ESD保护装置。 在制造包括第一放电电极和彼此相对布置的第二放电电极的ESD保护装置时，形成为跨越第一和第二放电电极的放电支撑电极和保持第一和第二放电电极的绝缘体基板 放电电极和放电支持电极，使用用于形成放电支撑电极的糊料，并且该糊料除了含有碱金属化合物和/或碱土金属化合物的粉末之外还含有具有网络形成的金属粉末 氧化物附着于颗粒表面，金属粉末和附着于颗粒表面的网络形成氧化物的半导体粉末或附着于颗粒表面的网络形成氧化物的金属粉末和附着有网络形成氧化物的半导体粉末 颗粒表面。
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公开(公告)号：US11328854B2
公开(公告)日：2022-05-10
申请号：US16255900
申请日：2019-01-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Sumiyo Nakamura , Jun Adachi
IPC: H01F5/00 , H01F27/28 , H01F27/29 , H01F27/34 , H01F41/12 , H01F27/32 , H01F41/04 , H01C7/12 , H01C1/148 , H01C17/28 , H01F17/00
Abstract: An electronic component includes a ceramic element body including glass, and outer electrodes provided on the ceramic element body. Each of the outer electrodes includes a base electrode layer on the ceramic element body and a buffer portion to buffer an impact. The base electrode layer includes a first region that is disposed on the ceramic element body and includes the buffer portion of equal to or more than about 15 vol % and equal to or less than about 50 vol %, and a second region that covers the first region and includes the buffer portion of equal to or more than about 1 vol % and equal to or less than about 10 vol %.
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Patent Agency Ranking
公开(公告)号：US10193333B2
公开(公告)日：2019-01-29
申请号：US15494615
申请日：2017-04-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Jun Adachi , Jun Urakawa , Issei Yamamoto
Abstract: An ESD protection device is manufactured such that its ESD characteristics are easily adjusted and stabilized. The ESD protection device includes an insulating substrate, a cavity provided in the insulating substrate, at least one pair of discharge electrodes each including a portion exposed in the cavity, the exposed portions being arranged to face each other, and external electrodes provided on a surface of the insulating substrate and connected to the at least one pair of discharge electrodes. A particulate supporting electrode material having conductivity is dispersed between the exposed portions of the at least one pair of discharge electrodes in the cavity.
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公开(公告)号：US09780533B2
公开(公告)日：2017-10-03
申请号：US14972517
申请日：2015-12-17
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Katsumi Yasunaka , Jun Adachi , Takayuki Tsukizawa
Abstract: An ESD protective device is provided which can lower a discharge start voltage. In an ESD protective device 1, first and second discharge electrodes 3 and 4 are disposed in a substrate 2 in a spaced relation with a discharge gap G interposed therebetween, and a conductor 9 is arranged around the discharge gap G. The conductor 9 has a nonlinear sectional shape in a section of the substrate 2 extending in a direction interconnecting a first principal surface 2a and a second principal surface 2b of the substrate 2 and passing the discharge gap G.
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公开(公告)号：US20150171618A1
公开(公告)日：2015-06-18
申请号：US14629860
申请日：2015-02-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takahiro Sumi , Jun Adachi , Takayuki Tsukizawa , Kumiko Ishikawa
IPC: H02H3/20
CPC classification number: H02H3/20 , H01C7/1006 , H01C7/102 , H01C7/105
Abstract: An ESD protection device having high insulation reliability and excellent discharge characteristics is provided. In an ESD protection device including a first and a second discharge electrode disposed to face each other, a discharge auxiliary electrode (18) formed so as to bridge the first and second discharge electrodes, and an insulating substrate holding the first and second discharge electrodes and the discharge auxiliary electrode (18), the discharge auxiliary electrode (18) is formed of an aggregate of metal grains (24) each having a core-shell structure comprising a core portion (22) primarily formed of a first metal and a shell portion (23) primarily formed of a metal oxide containing a second metal, and the aggregate of metal grains (24) further includes an insulating resin (27) which bonds the metal grains (24) to each other.
Abstract translation: 提供具有高绝缘可靠性和优异的放电特性的ESD保护装置。 在包括彼此相对配置的第一和第二放电电极的ESD保护装置中，形成有用于桥接第一和第二放电电极的放电辅助电极（18）以及保持第一和第二放电电极的绝缘基板 放电辅助电极（18），放电辅助电极（18）由金属颗粒（24）的集合体形成，每个金属颗粒具有芯壳结构，该芯壳结构包括主要由第一金属形成的芯部（22）和壳部 （23），其主要由含有第二金属的金属氧化物形成，并且金属颗粒（24）的集合体还包括将金属颗粒（24）彼此粘合的绝缘树脂（27）。
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公开(公告)号：US20140327993A1
公开(公告)日：2014-11-06
申请号：US14332638
申请日：2014-07-16
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takahiro Sumi , Kumiko Ishikawa , Jun Adachi , Takayuki Tsukizawa
IPC: H02H9/04
CPC classification number: H02H9/04 , H01T1/20 , H01T4/12 , H05K1/026 , Y10T29/49206
Abstract: Provided is an ESD protection device having excellent discharge characteristics at a low applied voltage. An ESD protection device includes a first discharge electrode and a second discharge electrode that are disposed so as to face each other, a discharge auxiliary electrode formed so as to span between the first discharge electrode and the second discharge electrode, and an insulator base that holds the first discharge electrode, the second discharge electrode, and the discharge auxiliary electrode. The discharge auxiliary electrode includes a plurality of metal particles (22) containing a first metal as a main component. Fine irregularities are formed on the surfaces of the metal particles (22). More specifically, the metal particles (22) has a fractal dimension D of 1.03 or more. Since electric charges are concentrated on the fine irregularities, discharge can be generated in the discharge auxiliary electrode by applying a relatively low voltage.
Abstract translation: 提供了在低施加电压下具有优异的放电特性的ESD保护装置。 ESD保护装置包括以彼此相对配置的第一放电电极和第二放电电极，形成为跨越第一放电电极和第二放电电极的放电辅助电极以及保持 第一放电电极，第二放电电极和放电辅助电极。 放电辅助电极包括含有第一金属作为主要成分的多个金属颗粒（22）。 在金属颗粒（22）的表面上形成微细凹凸。 更具体地，金属颗粒（22）的分形维数D为1.03以上。 由于电荷集中在微小的不规则性上，所以通过施加相对低的电压可以在放电辅助电极中产生放电。
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公开(公告)号：US10381806B2
公开(公告)日：2019-08-13
申请号：US15591223
申请日：2017-05-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Katsumi Yasunaka , Jun Adachi
Abstract: An ESD protection device includes a bare unitary body, and a first discharge electrode and a second discharge electrode that are disposed inside the bare unitary body. The first discharge electrode and the second discharge electrode are opposed to each other with a gap interposed therebetween. The bare unitary body includes a cavity in which the gap between the first discharge electrode and the second discharge electrode is located, and to which the first discharge electrode and the second discharge electrode are exposed. A first space of the cavity on a side closer to the first discharge electrode is smaller than a second space of the cavity on a side closer to the second discharge electrode.
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