Provided are a varistor forming paste, a cured product thereof, and a varistor, that can increase the degree of freedom in designing an electronic device, and can exhibit appropriate varistor characteristics. The varistor forming paste contains an epoxy resin (A), a curing agent (B), and a carbon aerogel (C).

In an embodiment a method for manufacturing a multilayer varistor includes providing a first ceramic powder for producing a first ceramic material and at least one second ceramic powder for producing a second ceramic material, wherein the ceramic powders differ from each other in concentration of monovalent elements X.sup.+ by 50 ppm≤Δc(X.sup.+)≤5000 ppm, wherein X.sup.+=(Li.sup.+, Na.sup.+, K.sup.+ or Ag.sup.+), and wherein Δc denotes a maximum concentration difference occurring between an active region and a near-surface region of the multilayer varistor, slicking of the ceramic powders and forming of green films, partially printing of a part of the green films with a metal paste to form inner electrodes, stacking printed and unprinted green films, laminating, decarbonizing and sintering the green films and applying outer electrodes.

A multilayer device and a method for producing a multilayer device are disclosed. In an embodiment a multilayer device includes a main body having at least two external electrodes, at least one first internal electrode; at least one second internal electrode, wherein each internal electrode is electrically conductively connected to an external electrode, a plurality of ceramic layers, wherein the ceramic layers comprise the internal electrodes and at least one dielectric layer, wherein, viewed along a stack direction of the ceramic layers, the dielectric layer being arranged between the internal electrodes, and wherein the dielectric layer is printed onto at least one sub-region of one of the ceramic layers.

A complex device is provided. A complex device according to an embodiment of the present invention comprises: a suppressor including a pair of first dielectric sheet layers having a first dielectric constant and a pair of internal electrodes spaced apart from each other on one surface of one of the pair of first dielectric sheet layers; a capacitor including a plurality of second dielectric sheet layers having a second dielectric constant and a plurality of capacitor electrodes provided on each of the plurality of second dielectric sheet layers; and a pair of external terminals provided on both sides of the suppressor and the capacitor to be connected to the plurality of capacitor electrodes and the pair of internal electrodes. Here, provided is the complex device in which the first dielectric constant is greater than the second dielectric constant.

A transient voltage protection device includes: an element body; a cavity portion provided in the element body; a pair of internal electrodes disposed in the element body; and a pair of external electrodes connected to the pair of internal electrodes. The pair of internal electrodes extend along a first direction and face each other in a second direction intersecting the first direction. The cavity portion includes a gap region located between the pair of internal electrodes in the second direction. A tip portion of at least one of the pair of internal electrodes is in contact with only the element body.

A multilayer chip varistor includes an element body, first and second external electrodes, and first and second electrical conductor groups. The first electrical conductor group includes a first internal electrode connected to the first external electrode, and a first intermediate electrical conductor opposed to the first internal electrode. The second electrical conductor group includes a second internal electrode including a first electrically conductive material and connected to the second external electrode, and a second intermediate electrical conductor opposed to the second internal electrode. At least one of the first and second intermediate electrical conductors includes the second electrically conductive material. The element body includes a low electrical resistance region between the first and second internal electrodes. The second electrically conductive material is diffused in the low electrical resistance region.

A varistor includes a sintered body, an internal electrode, an insulating layer, and an external electrode. The internal electrode is disposed in an interior of the sintered body. The insulating layer covers at least part of the sintered body and includes Zn.sub.2SiO.sub.4. The external electrode is electrically connected to the internal electrode, covers part of the sintered body and part of the insulating layer, and is in contact with the part of the insulating layer. The insulating layer has a region being in contact with the external electrode, the region having a greater average thickness than a region of the insulating layer which is out of contact with the external electrode.

The present invention relates to a polymer voltage-dependent resistor (PVDR) in various physical forms and methods for manufacturing the varistor. The body of the PVDR is composed of a polymer matrix having a filler composed of doped zinc oxide particles, other semi conductive particles or metal particles uniformly distributed therein. Conductive electrodes may be affixed to the polymer matrix and electrical leads attached to the electrodes.

A multilayer varistor includes a sintered body, an internal electrode disposed in the sintered body, a high-resistance layer covering at least part of the sintered body, and an external electrode covering part of the high-resistance layer, the external electrode being electrically connected to the internal electrode. An arithmetic mean roughness of a surface of the high-resistance layer is greater than or equal to 0.06 μm.

It is aimed to provide a laminated varistor capable of reducing stray capacitance to occur between an internal electrode and an external electrode, and also capable of reducing a variation in the stray capacitance due to a variation in the external electrode. A laminated varistor of the present disclosure has external electrodes on first end surface, second end surface, and first side surface of sintered body. No external electrode is provided on second side surface opposite to first side surface. Varistor regions in which internal electrodes overlap each other in a laminating direction are provided at positions closer to second side surface than to first side surface.