Murata Manufacturing Co., Ltd.

Takeshi Yamazaki

Shigemasa Kusabiraki

Tetsuo Takeshima

Yutaka Kawai

Toshio Nishimura

Toshiyuki Baba

Hirohide Yoshino

Yuji Kosugi

Jiro Inoue

Toshihiko Unami

Manabu Sumita

Mamoru Ogawa

Takashi Mizuguchi

Takashi Shimura

Kiyoshi Iyama

Tatsunori Kakuda

Sadayuki Kato

Sigeo Ojima

Masaaki Tutiya

Takashi Hosoe

Masanari Nishikigawa

Kenichi Nishimoto

Takeshi Kubo

While suppressing that a vibration of a piezo-electric element propagates to a substrate by devising the composition of an electro-conductive support body, the piezoelectric resonant component which secures electroconductivity and can maintain a fall-proof shock property is provided. The piezoelectric resonant component has a substrate on the top surface of which pattern electrodes and are formed, and on the lower surface of which it has electrodes and It has a piezoelectric element using the length vibration on the substrate Electro-conductive support bodies and are fixed to the length direction center section of the lower surface electrodes of the piezoelectric element The connection fixation of these support bodies and to the pattern electrodes and of the substrate is performed by electro-conductive adhesives and The electro-conductive support bodies and include an urethane resin which contains an electro-conductive filler, making the rate of content of the electro-conductive filler 75-85 wt %.

Piezoelectric resonant component

A piezoelectric resonator supporting structure supports a piezoelectric resonator at a supporting member through a connecting member. The piezoelectric resonator is adapted to vibrate in a longitudinal vibration mode. A portion of the fixing member that contacts the piezoelectric resonator is made of a vibration transmission restricting material for restricting transmission of vibration from the piezoelectric resonator to the supporting member through the connecting member.

Piezoelectric resonator supporting structure and a piezoelectric component including the same

A method of manufacturing a resonance element includes the steps of preparing a multilayered body having a plurality of piezoelectric layers and a plurality of inner electrodes laminated to each other, forming an insulating film on one surface of the multilayered body at exposed portions of the inner electrodes, the insulating film having a plurality of openings constituting substantially parallel rows which are substantially parallel to the laminating direction of the multilayered body, forming an outer electrode on substantially the entire surface on which the insulating film is formed, forming a plurality of grooves on the surface on which the outer electrode is formed and cutting the multilayered body substantially parallel to the grooves, wherein a first group of the openings in a first of the rows are disposed on every alternate exposed portion of the internal electrodes, and a second group of remaining openings in a second row adjacent to the first row are disposed on each of the remaining alternate exposed portions of the internal electrodes, the first and second row are separated from each other by a predetermined distance and the groove is formed between the first and second rows.

Method of manufacturing piezoelectric resonator

A stacked piezoelectric resonator and a characteristics-adjusting method therefor from which a desired capacitance can be obtained without changing outer dimensions of stacked piezoelectric resonators and without changing the design of a mother substrate used for forming a base for the resonators. A stacked piezoelectric resonator includes the base on which piezoelectric layers and internal electrodes are mounted. Each of the stacked surfaces of the piezoelectric layers and internal electrodes is arranged at an angle so as not to be perpendicular relative to a length of the base. The internal electrodes are alternately covered by insulators, and the external electrodes are disposed thereon and alternately connected to the internal electrodes arranged adjacent to each other to the external electrodes. To obtain the base, the mother substrate on which the piezoelectric layers and the internal electrodes are mounted is cut at an angle so as not to be perpendicular relative to each of the stacked surfaces.

Stacked piezoelectric resonator, characteristics-adjusting method thereof, and ladder-type filter including the same

A piezoelectric resonator includes a base member in which piezoelectric layers and internal electrodes are laminated. At one side surface of the base member, the internal electrodes are alternately covered with a first insulating film and with a second film, and first and second external electrodes are disposed thereon alternately connecting the internal electrodes to the first and second external electrodes. An additional material is disposed on the side surface of the base member opposite from the side surface on which the external electrodes are formed by applying ink via an ink jet printer or the like. The additional material is disposed at the opposite ends of the base member in the longitudinal direction. A metal film may also be disposed at a central portion of the base member by a thick film forming method.

Piezoelectric resonator, method for adjusting frequency of piezoelectric

A piezoelectric resonator which vibrates in a longitudinal vibration mode includes first insulating films disposed on a side surface of a base member so as to cover at least part of exposed portions of a first group of the internal electrodes and second insulating films disposed on the side surface of the base member so as to cover at least part of the exposed portions of a second group of the internal electrodes. A first thin-film external electrode extends continuously in the longitudinal direction of the base member on the first insulating films and a second thin-film external electrode extends continuously in the longitudinal direction of the base member on the second insulating film. A first conductive resin film and a second conductive resin film are respectively provided on the first thin-film external electrode and the second thin-film external electrode such that even if the thin-film external electrodes are broken or damaged, the piezoelectric resonator still functions.

Piezoelectric resonator and electronic component using the same

A base member of a piezoelectric resonator includes a laminated body having a plurality of piezoelectric layers which are alternately polarized in opposite directions along the longitudinal direction of the base member and inner electrodes provided between the piezoelectric layers. On a first side surface of the base member, each of two external electrodes is arranged so as to be connected to one of two groups of alternate inner electrodes. Cut portions for adjusting a frequency of the piezoelectric resonator to a higher frequency are respectively formed at edge portions of the base member at opposite ends in the longitudinal direction of a second side surface opposite from the first side surface of the base member.

Piezoelectric resonator method for adjusting frequency of piezoelectric

A piezoelectric resonator includes a piezoelectric resonator element vibrating in a longitudinal vibration mode and having a mounting surface, wherein a resin material is provided on the mounting surface of the piezoelectric resonator element, and the resin material has a hardness of about 0 to about 50 in units defined in the JIS-A standards and/or an elastic modulus of about 0.1 to 10 MPa.

Piezoelectric resonator and electronic component including same

An electronic device which has piezoelectric resonators and terminals piled in a box-like case. The electronic device has a couple of terminals, each of which has a contact portion and a junction portion extending from the contact portion. In the case, the couple of terminals are integrated by electrically connecting the junction portions.

Growing community of inventors

Ishikawa-ken, Japan

Takeshi Yamazaki