Tdk Corporation

Yasuhiro Hirobe

Kensaku Asakura

Atsushi Hitomi

Takeshi Urano

Tomokazu Ito

Yuji Terada

Masao Asakawa

Shingo Suzuki

Makoto Morita

Sho Nakagomi

The present invention provides an ESD protection device that not only has small electrostatic capacitance and an excellent discharge property but also has high durability against repeated use with the occurrence of short-circuiting between electrodes after discharge inhibited. An ESD protection device including an insulating substrate, electrodes arranged on this insulating substrate away from and opposite each other, and a discharge induction section located between these electrodes, wherein the discharge induction section is composed of a porous body, in which micropores are discontinuously scattered, and has a hollow structure having at least one or more hollow sections.

ESD protection device

The present invention is provided with a composite electronic device comprising an inductor element and an ESD protection element formed between two magnetic substrates, wherein the inductor element includes insulation layers made of a resin, and spiral conductors formed on the insulation layers, the ESD protection element includes a base insulation layer, a pair of gap electrodes arranged via gap formed therebetween on the base insulation layer, and an ESD absorbing layer arranged at least between the gap electrodes, and a gap protection layer provided on at least one of the upper side and lower side of the gap, the ESD absorbing layer includes a composite material having an insulation inorganic material and a conductive inorganic material discontinuously dispersed in a matrix of the insulation inorganic material. The gap protection layer is made of resin including magnetic powder and carbon.

Composite electronic device

The present invention is provided with a composite electronic device comprising an inductor element and an ESD protection element formed between two magnetic substrates, wherein the inductor element includes insulation layers made of a resin, and conductor patterns formed on the insulation layers, the ESD protection element includes a base insulation layer, a pair of electrodes arranged via gap formed therebetween on the base insulation layer, and an ESD absorbing layer arranged at least between the electrodes, and the ESD absorbing layer includes a composite material having an insulation inorganic material and a conductive inorganic material discontinuously dispersed in a matrix of the insulation inorganic material.

Composite electronic device, manufacturing method thereof, and connection structure of composite electronic device

An ESD protection device that has low capacitance, excellent discharge characteristics, and improved heat resistance and weather resistance is provided. A functional layer, which is a composite having a conductive inorganic materialdiscretely dispersed in a matrix of an insulating inorganic material, is disposed between electrodesanddisposed on an insulating substrateand facing but spaced apart from each other.

A composite electronic device includes first and second magnetic substrates, and a functional layer sandwiched between these magnetic substrates, and the functional layer is configured by a common-mode filter layer and a ESD protection element layer. An electrostatic capacitance of the ESD protection elements is equal to or lower than 0.35 pF. The common-mode filter layer includes a first spiral conductor formed on an insulation layer, and a second spiral conductor formed on an insulation layer. DC resistance of a common mode filter is equal to or higher than 0.5&#x3a9; and equal to or lower than 5&#x3a9;, and an electrostatic capacitance of the ESD protection elements is equal to or lower than 0.35 pF. A width W and a length L of the first and second spiral conductors satisfy a relational equation expressed by &#x221a;(L/W)&#x3c;(7.6651&#x2212;fc)/0.1385.

Composite electronic device and digital transmission circuit using thereof

The present invention is provided with a composite electronic device comprising an inductor element and an ESD protection element formed between two magnetic substrates, wherein the inductor element includes insulation layers made of a resin, and spiral conductors formed on the insulation layers, the ESD protection element includes a base insulation layer, a pair of gap electrodes arranged via gap formed therebetween on the base insulation layer, and an ESD absorbing layer arranged at least between the gap electrodes, and the ESD absorbing layer includes a composite material having an insulation inorganic material and a conductive inorganic material discontinuously dispersed in a matrix of the insulation inorganic material. The gap of the ESD protection element is provided at exterior of the spiral conductor so as not to be overlapped with the spiral conductor in view of a laminating direction.

The present invention provides an ESD protection device and the like having improved durability against repeated use. An ESD protection device includes a base having an insulating surface, electrodes disposed on the insulating surface and facing but spaced apart from each other, and a functional layer disposed on at least between the electrodes. The electrodes have a multistage structure in which a gap between the electrodes is narrower toward the base.

ESD protection device and composite electronic component of the same

An object of the present invention is to provide an ESD protection device and the like which offer a reduced discharge starting voltage and improved durability against repeated use. The present invention provides an ESD protection device including a basehaving an insulating surface, electrodesanddisposed on the insulating surfaceand facing but spaced apart from each other, and a functional layerdisposed on at least between the electrodesand, wherein the gap distance &#x394;G between the electrodesandranges from 0.5 &#x3bc;m to 10 &#x3bc;m, and the thickness &#x394;T of each of the electrodesandmeets a relationship of &#x394;G/&#x394;T=1 to 30.

Growing community of inventors

Tokyo, Japan

Yasuhiro Hirobe