Murata Manufacturing Co., Ltd.

Murata Manufacturingco., Ltd.

Kenichi Kotani

Masakazu Yoshio

Atsuhiko Hirata

Masaya Wajima

Takenobu Maeda

Kenichi Sakai

Mitsuhiro Yamada

Tsuneo Amano

Akio Ikeda

Yukio Yoshino

Toru Kasanami

Mikio Nakajima

A valve includes a lower valve housing, a diaphragm, and an upper valve housing. A top surface of a piezoelectric pump is bonded to a bottom surface of the lower valve housing. A circular hole portion is provided in a central portion of a region of the diaphragm that opposes a projecting portion of the lower valve housing. The diaphragm is bonded to the upper valve housing and the lower valve housing, and a divided interior of a valve housing configures a first lower valve chamber, a second lower valve chamber, a first upper valve chamber, and a second upper valve chamber. A groove is located in a wall portion of the upper valve housing that opposes the diaphragm in the first upper valve chamber.

Valve and fluid control appratus

Valve and fluid control apparatus

An energy trap type piezoelectric resonator component includes a piezoelectric resonator using a third overtone of a thickness longitudinal vibration. The piezoelectric resonator includes a piezoelectric substrate, and first and second vibrating electrodes, having an elliptical shape, and respectively arranged on portions of first and second major surfaces of the piezoelectric substrate such that the first and second vibrating electrodes face each other with the piezoelectric substrate interposed therebetween. A flattening ratio 'a/b' of a minor axis diameter 'b' to a major axis diameter &#x201c;a&#x201d; of the elliptical shape is within a range of from about 1.2 to about 1.45. The resonator is thus compact, effectively controls the fundamental wave of the thickness longitudinal vibration as a spurious wave, is relatively free from area restraints of the electrode and dimensional constraints, and meets a variety of frequency requirements in a wide range.

Energy trap type piezoelectric resonator component

A piezoelectric resonator component includes an energy-trapped piezoelectric resonator utilizing a third order harmonic wave of thickness longitudinal vibration and including a piezoelectric substrate having first and second major surfaces and polarized in a direction of thickness between the first and second major surfaces, and first and second vibrating electrodes opposed to each other with the piezoelectric substrate interposed therebetween, and first and second casing substrates respectively laminated on the first and second major surfaces of the piezoelectric resonator so that cavities are arranged so as not to interfere with vibration of a vibration section where the first and second vibrating electrodes face each other through the piezoelectric substrate. The first and second vibrating electrodes are dimensioned so that the difference between the peak values of the phases of S0 and S1 modes of the fundamental wave of the thickness longitudinal vibration falls within a range of about &#xb1;5 degrees.

Piezoelectric resonator component

An outer coating substrate for an electronic component is constructed to be calcined at a low temperature, and greatly decreases the cost thereof while greatly improving the dimensional precision of the substrate. The outer coating substrate for an electronic component includes a multi-layered substrate including a first material layer that is sintered in a liquid phase and a second material layer that is not sintered at the sintering temperature of the first material layer. The first and second material layers are laminated, and calcined at the calcining temperature of the first material layer.

Outer coating substrate for electronic component and piezoelectric resonant component

An electronic component includes a laminate having a structure in which an element substrate and a sealing substrate are bonded to each other through an adhesive layer, a terminal electrode is arranged on the element substrate so as to be exposed at an end surface of the laminate, an outside electrode is disposed on the outer surface of the sealing substrate, the terminal electrode and the outside electrode are electrically connected to each other through an end surface electrode disposed on the end surface of the laminate, and the thickness of the end surface electrode is between about one half of the thickness of the adhesive layer and about five times of the thickness thereof.

Electronic component and method of producing the same

A piezoelectric resonator includes a piezoelectric resonating element, and a first exterior substrate and a second exterior substrate, laminated over and under, respectively, the piezoelectric resonating element. In the piezoelectric resonator, the first exterior substrate and the second exterior substrate each include a multilayer substrate having at least one layer of an internal electrode.

Piezoelectric resonator and piezoelectric oscillator

A surface-mount electronic component includes a terminal electrode film that is formed by various film-forming processes on the surface of a main unit of the surface-mount electronic component. A lead-in terminal extends from an internal electrode and is arranged in the surface-mount electronic component so as to extend up to the surface of the main unit for establishing electrical connection between the internal electrode and the terminal electrode film. In the surface-mount electronic component, the lead-in terminal of the internal electrode extends to at least one of the surfaces of the main unit, except a surface-mount surface of the main unit and the surface that is opposite to the surface-mount surface. An exposed portion of the lead-in terminal is coated by at least one of the terminal electrode film and a protective film.

Surface-mount electronic component

A small and easily produced piezoelectric resonator, which effectively damps unwanted vibration and utilizes intended vibration includes excitation electrodes provided on both main surfaces of a piezoelectric substrate, and first and second lead-out electrodes and first and second terminal electrodes electrically connected to the excitation electrodes, respectively. At least one of the terminal electrodes includes an electrode extension portion arranged to extend into the imaginary region where the first and second excitation electrodes are extended to at least one of the side edges of the piezoelectric substrate.

Piezoelectric resonator

A piezoelectric resonator has a structure that enables easy manufacturing thereof and that damps the fundamental wave of a thickness vertical vibration mode with high accuracy, while effectively utilizing the resonance characteristics based on the third harmonic. In the piezoelectric resonator, first and second excitation electrodes are located on two main surfaces of a piezoelectric substrate, lead-out electrodes and terminal electrodes are provided for each of the first and second excitation electrodes, and each of the terminal electrodes is arranged to occupy an area that is not less than about 10% of the area of an annular region which ranges over a normal-line distance of about 1.2 d to about 2 d from the outer peripheral edge of each of the excitation electrodes, where d is the diameter of each of the excitation electrodes.

A piezoelectric component includes leads and being arranged to suppress the adhesion of solder or a conductive adhesive agent to lead-out electrodes or vibration electrodes thereof, which is therefore resistant to the deterioration of electrical characteristics such as resonance characteristics, and which minimizes fluctuation of the electrical characteristics. In this piezoelectric component having the leads, the vibration electrodes are provided on each of the first and second main surfaces of a piezoelectric plate, and each of the vibrating electrodes is connected to a terminal electrode via a lead-out electrode. Each of the holding portions of a lead terminal is bonded to the terminal electrode, and is arranged so as not to extend onto the lead-out electrode.

Piezoelectric component with leads

A piezoelectric resonance device wherein both ends of a piezo-resonator which has oscillation electrodes on both sides of a piezoelectric substrate are soldered to the inside of cup portions of input and output terminals respectively, and a pair of opposed capacity electrodes of a capacitor is soldered to the outside of the cup portions. The capacitor has a width larger than that of the cup portions.

Growing community of inventors

Toyama-ken, Japan

Kenichi Kotani