公开(公告)号：US20180351330A1

公开(公告)日：2018-12-06

申请号：US16055192

申请日：2018-08-06

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiromitsu HONGO ,  Takahiro SUMI ,  Takeshi MIKI ,  Jun ADACHI ,  Takayuki TSUKIZAWA ,  Takashi NOMA

IPC: H01T1/20 ,  H01T2/02 ,  H01T21/00 ,  H01T4/12 ,  H01L23/60

Abstract: An ESD protection device includes first and second discharge electrodes and a discharge auxiliary electrode that is electrically connected to the first and second discharge electrodes. The first and second discharge electrodes are located on or in an insulating substrate to at least partially face each other. The discharge auxiliary electrode includes first metal particles, second metal particles, and a binding agent. The first metal particles have a core-shell structure including a core section mainly including a first metal and a shell section which mainly includes an oxide of a second metal and which includes at least one portion with a cavity. The second metal particles have a core-shell structure including a core section mainly including the first metal and a shell section which mainly includes the oxide of the second metal and which has no cavity.

公开(公告)号：US20180103532A1

公开(公告)日：2018-04-12

申请号：US15834149

申请日：2017-12-07

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takayuki TSUKIZAWA ,  Takeshi MIKI

IPC: H05F3/04

CPC classification number: H05F3/04 ,  H01T1/20 ,  H01T2/02 ,  H01T4/10 ,  H01T4/12

Abstract: An ESD protection device includes a base body, first and second discharge electrodes provided in the base body and facing each other in a lamination direction, and a discharge auxiliary electrode that is provided between the first and second discharge electrodes and electrically couples the first and second discharge electrodes. The base body includes a cavity provided around at least a portion of an outer surface of the discharge auxiliary electrode and the cavity exposes the first discharge electrode, the second discharge electrode, and a region that is included in the outer surface of the discharge auxiliary electrode and is present between the first discharge electrode and the second discharge electrode.

公开(公告)号：US20170033097A1

公开(公告)日：2017-02-02

申请号：US15290089

申请日：2016-10-11

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takahiro SUMI ,  Jun ADACHI ,  Takayuki TSUKIZAWA ,  Katsumi YASUNAKA ,  Sumiyo NAKAMURA ,  Mayu SUZUKI

IPC: H01L27/02 ,  H01L21/283 ,  H01L21/02 ,  H01L49/02

CPC classification number: H01L27/0288 ,  H01L21/02529 ,  H01L21/283 ,  H01L28/60 ,  H01T4/10 ,  H01T4/12 ,  H01T21/00

Abstract: An ESD protection device includes an insulative substrate, first and second discharge electrodes contacting the insulative substrate, the first and second discharge electrodes being spaced apart from and opposed to each other, first and second outer electrodes provided on an outside surface of the insulative substrate and electrically connected to the first and second discharge electrodes, respectively; and a discharge auxiliary electrode extending from the first discharge electrode to the second discharge electrode in a region where the first and second discharge electrodes oppose each other. The discharge auxiliary electrode includes semiconductor particles and metal particles having an average particle diameter of about 0.3 μm to about 1.5 μm, and a density of the metal particles at a random cross-section of the discharge auxiliary electrode is greater than or equal to about 20 particles/50 μm2.

Abstract translation: ESD保护器件包括绝缘衬底，与绝缘衬底接触的第一和第二放电电极，第一和第二放电电极彼此间隔开并彼此相对，设置在绝缘衬底的外表面上的第一和第二外电极以及 电连接到第一和第二放电电极; 以及在第一和第二放电电极彼此相对的区域中从第一放电电极延伸到第二放电电极的放电辅助电极。 放电辅助电极包括平均粒径为约0.3μm至约1.5μm的半导体颗粒和金属颗粒，并且放电辅助电极的随机横截面处的金属颗粒的密度大于或等于约20 颗粒/50μm。

公开(公告)号：US20170093150A1

公开(公告)日：2017-03-30

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

IPC: H02H9/04

CPC classification number: H02H9/044 ,  H01T1/20 ,  H01T4/12

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.

公开(公告)号：US20170042007A1

公开(公告)日：2017-02-09

申请号：US15296132

申请日：2016-10-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Mayu SUZUKI ,  Jun ADACHI ,  Takayuki TSUKIZAWA

IPC: H05F3/04

CPC classification number: H05F3/04 ,  H01T1/20 ,  H01T1/22 ,  H01T2/02 ,  H01T4/04 ,  H01T4/10 ,  H01T4/12 ,  H05K1/026

Abstract: An electro-static discharge protection device includes a ceramic base material, first and second outer electrodes on the outer surface of the ceramic base material, a hollow portion inside the ceramic base material, a first discharge electrode including a first end portion electrically connected to the first outer electrode and a second end portion in the hollow portion, a second discharge electrode including a first end portion electrically connected to the second outer electrode and a second end portion spaced apart from the first discharge electrode in the hollow portion, and a discharge supporting electrode including silicon carbide and between the second end portion of the first discharge electrode and the second end portion of the second discharge electrode. The elemental alkali metal in the ceramic base material is about 3 percent by weight or less.

Abstract translation: 一种静电放电保护装置，包括陶瓷基材，陶瓷基材的外表面上的第一外电极和第二外电极，陶瓷基材内的中空部，第一放电电极，第一端部电连接到 第一外部电极和中空部分中的第二端部，第二放电电极，包括电连接到第二外部电极的第一端部和与中空部分中的第一放电电极间隔开的第二端部，以及放电支撑 包括碳化硅的电极和第一放电电极的第二端部和第二放电电极的第二端部之间。 陶瓷基材中的元素碱金属为约3重量％以下。

公开(公告)号：US20160044769A1

公开(公告)日：2016-02-11

申请号：US14922417

申请日：2015-10-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takayuki IMADA ,  Takayuki TSUKIZAWA ,  Jun ADACHI

IPC: H05F3/04

CPC classification number: H05F3/04 ,  H01T1/22 ,  H01T4/10 ,  H01T4/12 ,  H05K1/0259 ,  H05K1/026 ,  H05K1/0306 ,  H05K1/092 ,  H05K3/1291 ,  H05K3/4629 ,  H05K9/0067 ,  H05K2201/0209 ,  H05K2203/308

Abstract: There is provided an ESD protection device capable of lowering a discharge starting voltage. An ESD protection device 1 includes a ceramic multilayer substrate 2, a first discharge electrode 4 and a second discharge electrode 5 arranged at a height position of the ceramic multilayer substrate, an end 4a of the first discharge electrode 4 and an end 5a of the second discharge electrode 5 facing each other, in which each of the first discharge electrode 4 and the second discharge electrode 5 contains a metal and a shrinkage suppression material having a lower rate of shrinkage than that of the metal at a temperature at which firing for the production of the ceramic multilayer substrate 2 is performed.

Abstract translation: 提供能够降低放电起始电压的ESD保护装置。 ESD保护器件1包括布置在陶瓷多层基板的高度位置处的陶瓷多层基板2，第一放电电极4和第二放电电极5，第一放电电极4的端部4a和第二放电电极5的端部5a 放电电极5彼此面对，其中第一放电电极4和第二放电电极5中的每一个都包含金属，并且在生产焙烧温度下具有比金属低的收缩率的收缩抑制材料 的陶瓷多层基板2。