Seiko Epson Corporation

Epson Toyocom Corporation

Hideo Tanaya

Fumitaka Kitamura

Junichiro Sakata

Yoshiyuki Yamada

Yoji Nagano

Tatsuya Anzai

Jun Amako

Kazushige Umetsu

Katsumi Kuroda

Kazuya Hirasawa

Toshinari Jokura

Atsushi Oshiro

A quartz crystal vibrator element having the weight section is provided with the intermediate weight section formed to have an arm width Wlarger (thicker) than the arm width W of the vibrating arm section and smaller (thinner) than the arm width Wof the tip weight section, thereby making the intermediate weight section follow the vibration (the amplitude) of the vibrating arm section. Further, the tip weight section formed to have an arm width Wlarger (thicker) than the arm width Wof the intermediate weight section is provided, thereby making the tip weight section follow the vibration (the amplitude) of the vibrating arm section and the intermediate weight section. Therefore, the vibration characteristics of the vibrating arm section can be stabilized.

Vibrator element, vibrator, oscillator, and electronic apparatus

A flexural mode resonator element includes: a vibration arm extending from a base end toward a tip; a base joined to the vibration arm at the base end; and supporting arms arranged on both sides of the base in a width direction perpendicular to an extending direction of the vibration arm and joined to the base, wherein the base has a reduced cross-section portion disposed along the extending direction of the vibration arm between a joint portion with the vibration arm and a joint portion with the supporting arms, and the reduced cross-section portion is disposed so as to satisfy a relationship 2&#xd7;W&#x2266;L&#x2266;6&#xd7;Wwhere L is the length of the reduced cross-section portion in the extending direction of the vibration arm, and Wis the arm width of the vibration arm.

Flexural mode resonator element, resonating device, and electronic apparatus

A quartz crystal device includes a crystal resonator element and a package including a plurality of components. The plurality of components are bonded using a metal paste sealing material containing a metallic particle having an average particle size from 0.1 to 1.0 &#x3bc;m, an organic solvent, and a resin material in proportions of from 88 to 93 percent by weight, from 5 to 15 percent by weight, and from 0.01 to 4.0 percent by weight, respectively, to hermetically seal the crystal resonator element in the package.

Quartz crystal device and method for sealing the same

A tuning fork resonator element that has a base portion, first and second resonating arms extending from the base portion in a first direction, and a support frame sandwiching the first and second resonating arms and being connected to the base portion includes: a first excitation electrode, formed in an area close to a connection portion with the base portion of the support frame, being connected to a mount electrode with a conductive adhesive; a second excitation electrode, formed in at least one of an area sandwiching the first and second resonating arms of the support frame and an area positioned farther than the first and second resonating arms in the first direction, being connected to a mount electrode with the conductive adhesive; and a cut portion of the support frame formed on an external surface of the support frame.

Tuning fork resonator element and tuning fork resonator

A quartz crystal device includes a crystal resonator element and a package including a plurality of components. The plurality of components are bonded using a metal paste sealing material containing a metallic particle having an average particle size from 0.1 to 1.0 &#x3bc;m, an organic solvent, and a resin material in proportions of from 88 to 93 percent by weight from 5 to 15 percent by weight, and from 0.01 to 4.0 percent by weight, respectively, to hermetically seal the crystal resonator element in the package.

Method for sealing a quartz crystal device

A package for electronic component includes: a rectangular package body, a lid hermetically sealing the package body, an electrode pad provided in the package body, a mounting terminal provided at least near four corners of a bottom surface of the package body and having a bump on a mounting surface, and a plurality of coupling electrodes electrically coupling the pad to the mounting terminal.

Package for electronic component and piezoelectric resonator

A piezoelectric vibration element having a favorable drive level characteristic for miniaturization, and a piezoelectric oscillator. The piezoelectric vibration element includes a base made of a piezoelectric material, a plurality of vibration arms extended from the base, a long groove formed along a longitudinal direction of a main surface of each of the plurality of vibration arms, and an exciting electrode provided inside the long groove. A center position in a width dimension of the long groove is decentered in a minus X-axis direction from a center position of an arm width dimension.

Piezoelectric vibration element and piezoelectric device

There is provided a piezoelectric vibrating reed, including: a base formed of a piezoelectric material and having a predetermined length; a plurality of vibrating arms extended from one side of the base; a support arm extended in a width direction from the other side spaced apart from the one side of the base by a predetermined interval and extended outside the vibrating arms in the same direction as the vibrating arms; and a cut portion formed of the piezoelectric material reduced in its width direction at a location closer to the vibrating arms than a connection portion where the support arms are connected to the base as one body, wherein a through-hole is also disposed at a location closer to the vibrating arms than the connection portion where the support arms are connected to the base as one body.

Piezoelectric vibrating reed and piezoelectric device

A piezoelectric device comprises: a piezoelectric resonator element having a base, a plurality of oscillating arms paralleled each other and extended from the base, a plurality of supporting arms extended from the base and in parallel with the side surface of each of the plurality of oscillating arms so as to sandwich the plurality of oscillating arms, a groove formed in at least one of a front surface and a back surface of each of the plurality of oscillating arms and an end weight layer formed in at least one of the front surface and the back surface near to an end portion of each of the plurality of oscillating arms; a package storing the piezoelectric resonator element within a containable recess and being air-tightly sealed by a lid; a bottom surface recess rimmed in the bottom surface of the containable recess; and a connecting pad formed as a protrusion in an region that is connected with the plurality of supporting arms in the bottom surface of the containable recess. A part of the plurality of supporting arms is connected to the connecting pad via a joint portion. The bottom surface recess includes an edge in a region of the bottom surface of the containable recess opposing a part of the plurality of oscillating arms between the groove and the end weight layer, and the edge rims the bottom surface recess so as to allocate a part of the bottom surface of the containable recess opposing the end weight layer inside of the edge.

Piezoelectric device

A piezoelectric resonator element including: a base formed of a piezoelectric material and having a given length; a plurality of vibration arms extending from one part of the base; and a supporting arm extending from another part of the base spaced apart from the one part of the base by the given length in a width direction, the supporting arm extending in a common direction with the vibration arms outboard the vibration arms.

Piezoelectric resonator element and piezoelectric device

[Problem to be Solved] A piezoelectric device is provided in which, when the piezoelectric device is miniaturized, drive level characteristics are favorable, stress does not remain in a bonding portion of a housing body, and a factor causing deterioration of characteristics does not remain. [Solution] A piezoelectric device includes a base substrate, a resonator elementwith a frame, and a lidlayered over and fixed to the resonator element with a frame, in which the base substrate, the resonator element with a frame, and the lid are all formed from a same material. The resonator elementwith a frame includes a resonator element main bodyand a frame section. Each bonding surface bonding the base substrate, the resonator element with a frame, and the lid is bonded by surface activation bonding and hermetically sealed. An electrode for driving of the resonator element main bodyis routed to the frame section as an extraction electrode. As a result of bonding, the extraction electrode of the frame section is electrically connected to a mounting electrode serving as an external terminal provided on the base substrate, via a conductive pattern formed on the bonding surface of the base substrate.

Growing community of inventors

Suwa, Japan

Hideo Tanaya