公开(公告)号：US20180338372A1

公开(公告)日：2018-11-22

申请号：US16049880

申请日：2018-07-31

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takeshi MIKI ,  Hiromitsu HONGO ,  Takahiro SUMI

IPC: H05F3/04

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

Abstract: An ESD protection device includes a ceramic element assembly including a glass component, first and second discharge electrodes on the same plane in the ceramic element assembly and opposed to each other with a gap therebetween, a discharge auxiliary electrode that connects the first discharge electrode to the second discharge electrode on the same plane, and a seal layer that is disposed between the discharge auxiliary electrode and the ceramic element assembly and that reduces or prevents a glass component in the ceramic element assembly from entering the discharge auxiliary electrode. The seal layer includes a conductive component.

公开(公告)号：US20180062354A1

公开(公告)日：2018-03-01

申请号：US15795385

申请日：2017-10-27

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takeshi MIKI

IPC: H01T4/12 ,  H05K1/02 ,  H05K3/46 ,  H02H9/04

CPC classification number: H01T4/12 ,  H01T1/20 ,  H01T2/02 ,  H01T4/10 ,  H02H9/044 ,  H05K1/0259 ,  H05K1/026 ,  H05K3/4629

Abstract: An ESD protection device includes a multilayer substrate, first and second discharge electrodes, and a discharge auxiliary electrode. Discharge portions of the first and second discharge electrodes are opposed to each other in a lamination direction of insulating layers with the discharge auxiliary electrode interposed between both the discharge portions. A cavity is provided within the multilayer substrate in at least one of a region positioned adjacent to or in a vicinity of the discharge portion of the first discharge electrode on an opposite side to the discharge auxiliary electrode and a region positioned adjacent to or in a vicinity of the discharge portion of the second discharge electrode on an opposite side to the discharge auxiliary electrode.

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：US20180098410A1

公开(公告)日：2018-04-05

申请号：US15834187

申请日：2017-12-07

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Jun ADACHI ,  Takeshi MIKI ,  Takahiro SUMI

IPC: H05F3/04

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

Abstract: An ESD protection device includes an insulating ceramic body including a cavity portion, an auxiliary electrode including a first and second main surfaces, the auxiliary electrode being embedded in the insulating ceramic body such that a side end portion of the auxiliary electrode between the first and second main surfaces is exposed to the cavity portion, and first and second discharge electrodes embedded in the insulating ceramic body such that main surfaces of the first and second discharge electrodes face each other with the auxiliary electrode interposed therebetween, the auxiliary electrode including first and second auxiliary electrode layers, the first auxiliary electrode layer having a higher content of a conductive material than the second auxiliary electrode layer, the first auxiliary electrode layer being joined to at least one of the first and second discharge electrodes.