Seiko Epson Corporation

Takeo Funakawa

Munehiro Shibuya

Takashi Yamazaki

Tsukasa Funasaka

Makoto Furuhata

Yuki Hanamura

Satoshi Fujii

Eiichi Nagasaka

Masahiro Ishii

Katsuo Takano

For example, an escape gear portion as a watch component includes a substrate containing silicon as a main component, and a light reflecting layer including a first silicon oxide layer, a silicon layer, and a second silicon oxide layer that are stacked, in this order, at the substrate, wherein, when the light reflecting layer is viewed in plan view, the light reflecting layer includes a first region and a second region, and a thickness of the silicon layer in the first region is different from a thickness of the silicon layer in the second region.

Watch component, watch movement and watch

An escape wheel (an example of a timepiece component) has a silicon-made substrate having an insertion portion into which an axle is inserted, and a coating film formed in a contact portion which comes into contact with at least the axle, at a surface of the substrate. The coating film contains metal alkoxide having a fluorine atom.

Timepiece component, timepiece movement, and timepiece

An escape wheel serving as a watch component that constitutes a drive mechanism of a watch includes a tooth portion, and a base mainly composed of silicon. A contact surface where the tooth portion makes contact with another component includes a recess.

Watch component and watch

Provided is a watch component made of silicon and including a front surface, a back surface, and a side surface intersecting with the front surface and the back surface, the watch component including a first recessed portion formed at the front surface side, a second recessed portion formed at the back surface side, and a communicating groove causing one of the first recessed portion and the second recessed portion to communicate with the side surface.

Watch component, movement, watch and method for manufacturing watch component

A watch component includes a shaft member including a shaft and a flange portion formed to protrude in a direction intersecting with an axial direction of the shaft, a body portion made of silicon and provided with an insertion hole through which the shaft is inserted, and a fixing member mounted on the shaft at a side of the body portion opposite from the flange portion. The body portion includes an accommodating recessed portion configured to accommodate the flange portion, and is fixed to the shaft member by being interposed between the flange portion and the fixing member.

Watch component, movement and watch

Provided are a mechanical part, a timepiece having the mechanical part, and a method of manufacturing a mechanical part that suppresses separation and rotation of a rotating member to a staff member, and can be manufactured at a competitive cost. A escape wheel and pinionas an example of a mechanical part has a staff member; an escape wheelwith a holeto which the staff memberis inserted, and ribsthat extend toward the staff member; and an annular fastening memberthat affixes the escape wheelto the staff member. The fastening memberis disposed touching the ribsand deforming to protrude into the hole

Mechanical part, timepiece, and method of manufacturing a mechanical part

An escape wheel and pinion includes an escape wheel that has an axle, a web arm which holds the axle, and a rim which has a plurality of teeth. The web arm has a spoke which radially extends from the rim, and a comb including a radial spine and cross beams branching from the spoke.

Mechanical component and timepiece

An escape wheel & pinion serving as a mechanical component includes an axle and an escape wheel serving as a rotary member having a holder for holding the axle. The axle has a recessed portion into which the holder is fitted. A tapered portion inclined in an axial direction of the axle is disposed in a portion where the recessed portion is in contact with the holder.

Mechanical component, timepiece, and manufacturing method of mechanical component

An optical filter includes a first substrate, a first mirror formed on the first substrate, a second substrate coupled to the first substrate, the second substrate including a concave portion, a second mirror formed on the concave portion and facing the first mirror, and an electrode formed on the second substrate and around the second mirror. The first substrate includes a plurality of first hinge portions and a plurality of second hinge portions inside the plurality of first hinge portions.

Optical filter and optical module having optical filter

Deterioration of the Q value caused by the thermoelastic effect is suppressed. Since a first depth of a first groove and a second depth of a second groove are smaller than a distance between a surface including a third surface and a surface including a fourth surface, the first and second grooves do not penetrate between the surface including the third surface and the surface including the fourth surface. In addition, the sum of the first depth of the first groove and the second depth of the second groove is greater than the distance between the third and fourth surfaces, a heat transfer path between a first expandable portion (the first surface) and a second expandable portion (the second surface) cannot be formed as a straight line. As such, the heat transfer path between the first expandable portion (the first surface) and a second expandable portion (the second surface) is made to detour to the first and second grooves and and thus be lengthened.

Flexural vibrating reed, flexural vibrator, and piezoelectric device

An optical filter comprising a first substrate, a first mirror formed on the first substrate, a second substrate coupled to the first substrate, the second substrate including a concave portion, and a second mirror formed on the concave portion and facing the first mirror, wherein the first substrate includes a first portion located on the first mirror, a second portion located around the first portion, a third portion located around the second portion, and a fourth portion located around the third portion, wherein both a thickness of the second portion and a thickness of the fourth portion are equal to or smaller than a thickness of the first portion.

A vibrator element includes a base section, vibration arms, and excitation electrodes provided to the respective vibration arms, the excitation electrodes each include a first electrode disposed on a principal surface side of the vibration arm, a second electrode disposed so as to be opposed to the first electrode, and a piezoelectric body extending between the first electrode and the second electrode, and ITO is used as at least one of the first electrode and the second electrode.

Vibrator element, vibrator, oscillator, and electronic apparatus

A vibrating piece manufacturing method includes: (a) preparing a supporting body having first and second surfaces, the first and second surfaces defining a thickness while being directed toward opposite directions, the supporting body including a base and a plurality of arms, the arms extending side-by-side in a direction orthogonal to a direction of the thickness from the base, a lower electrode film being disposed on the first surface of each of the arms, a piezoelectric film being disposed on the lower electrode films, at least one upper electrode film being disposed on the piezoelectric film, at least a part of the second surface of each of the arms being an exposed area; and (b) etching the exposed area of the second surface so as to reduce the thickness to reduce flexural rigidity of the arms with respect to the thickness direction.

Vibrating piece manufacturing method and vibrator manufacturing method

A resonator element includes: three or more resonating arms, each of the resonating arms including; a lower electrode provided on a first surface of the resonating arm, a piezoelectric film formed on the lower electrode, an upper electrode formed on the piezoelectric film, a first wiring line coupled to the lower electrode, and a second wiring line coupled to the upper electrode; and a base to which the resonating arms are connected. In the resonator element, the resonating arm vibrates in a thickness direction of the resonating arm. The resonating arms adjacent to each other vibrate in opposite directions from each other. The first surface is opposed to a second surface in the thickness direction. The second wiring line is drawn out to the second surface through side surfaces of the resonating arm so as to surround the resonating arm.

Growing community of inventors

Chino, Japan

Takeo Funakawa