摘要:
A monolithic type varistor in which a plurality of inner electrodes are arranged in a sintered body composed of semiconductor ceramics so as to be overlapped with each other while being separated by semiconductor ceramic layers. The plurality of inner electrodes are electrically connected to first and second outer electrodes formed on both end surfaces of the sintered body. One or more non-connected type inner electrodes are arranged between adjacent ones of the plurality of inner electrodes and are not electrically connected to the outer electrodes, each of the non-connected type inner electrodes being spaced apart from each adjacent inner electrode or non-connected type inner electrode while being separated therefrom by a semiconductor ceramic layer. Voltage non-linearity is obtained by Schottky barriers formed at the interface of the inner electrode and the semiconductor ceramic layer and the interface of the non-connected type inner electrode and the semiconductor ceramic layer. The value of the number of grain boundaries between semiconductor particles in at least one semiconductor ceramic layer is two or less.
摘要:
A chip type varistor in which first and second inner electrodes are embedded in a sintered body obtained by laminating a plurality of semiconductor ceramics layers so as not to be overlapped with each other in the direction of thickness of the ceramics layers, respective one edges of the first and second inner electrodes are led out to one and the other of a pair of side surfaces opposed to each other of the sintered body and are electrically connected to outer electrodes formed on the pair of side surfaces of the sintered body, respectively, a non-connected type inner electrode which is not electrically connected to the above described outer electrodes is embedded in the sintered body, and the non-connected type inner electrode is arranged so as to be overlapped with the first and second inner electrodes while being separated by the semiconductor ceramics layer.
摘要:
Respective first end portions of first and second internal electrodes are exposed at respective end surfaces of a varistor body, which is in the form of a rectangular parallelepiped. These end surfaces of the varistor body are covered with low resistance parts which include ceramic material in order to prevent the internal electrodes from decomposition. External electrodes are formed on the low resistance parts, so as, to be electrically connected with corresponding ones of the internal electrodes through the low resistance parts.
摘要:
A noise filter including semi-conductor ceramics having voltage non-linearity characteristics. End surface electrodes are formed on a pair of opposing end surfaces of the semi-conductor ceramics and side surface electrodes are formed on a pair of side surfaces thereof. A first inner electrode is formed inside the semi-conductor ceramics having one end surface electrically connected to one of the end surface electrodes. A second inner electrode is formed inside the semi-conductor ceramics so as to be overlapped with the first inner electrode and separated therefrom by a ceramic layer. Both end surfaces of the second inner electrode are electrically connected to the pair of side surface electrodes. At least one resistance layer is embedded in the semi-conductor ceramics so that both end surfaces of the resistance layer are electrically connected to the pair of end surface electrodes.
摘要:
A noise filter of a monolithic type in which a common electrode is formed in a sintered body having varistor characteristics so as to extend from a first portion to a second portion of side surfaces of the sintered body, and at least one through electrode is formed in a position at a height spaced apart from the common electrode through a sintered body layer in the direction of thickness so as to extend from a third portion to a fourth portion of the side surfaces of the sintered body and to intersect the common electrode.
摘要:
A resistor 1 in which at least one resistance film 4 is embedded in a ceramic sintered body 3, glass is diffused into the sintered body 3 to form a glass diffusion layer 6, and both end faces 4a and 4b of the resistance film 4 are respectively exposed to both end faces 3a and 3b of the ceramic sintered body 3.
摘要:
A method for producing negative temperature coefficient thermistor units, comprising the steps of forming a pair of green sheets of insulating ceramic material, stacking the green sheets interposing therebetween in predetermined areas a layer of paste for thermistor elements; providing for each thermistor unit a coating of paste to be formed into internal electrodes; cutting the stacked sheets into individual thermistor units; co-firing the thermistor units whereby the thermistor element is enclosed in an envelope of sintered ceramic material or sandwiched between two layers of sintered ceramic material. A pair of external electrodes is then provided on each thermistor unit.
摘要:
A negative temperature coefficient thermistor and a method of producing the same are disclosed. A thermistor element is placed between a pair of sheets of insulating ceramic and co-fired to be sintered into an independent thermistor unit. A pair of internal electrodes are provided on both sides of the thermistor unit and electrically connected to corresponding external electrodes.
摘要:
A metallized ceramic structure includes a ceramic substrate preferably aluminum nitride and a metallic layer preferably tungsten bonded to the ceramic substrate. First and second mixture layers are formed between the ceramic substrate and the metallic layer to bond the ceramic substrate and the metallic layer. The first mixture layer is in contact with the ceramic substrate and the second mixture layer is in contact with the metallic layer. Each of the mixture layers includes a mixture of ceramic of the ceramic substrate and the metal of the metallic layer. The second mixture layer has a lower percentage of the ceramic than the first mixture layer.
摘要:
A resistor having a ceramic sintered body and at least one resistor film embedded therein so as to be covered by the ceramic sintered body except for portions of the resistor film-chat are connected to external electrodes. The sintered body is mainly composed of ZnO, and contains at least one element of Bi, Pb, B and Si as a subcomponent with respect to the main component.