Abstract: To provide an optical element, an optical lowpass filter, and a solid-state imaging device of which quality and capability are hard to deteriorate even if they are continually subject to both of a high-temperature, high-humid environment and a normal environment. An optical lowpass filter includes a first birefringent plate, an IR-cut glass, a ¼ retardation film, a second birefringent plate, and a pressure sensitive adhesive as a bonding layer bonding these members. The pressure sensitive adhesive primarily contains a pressure sensitive adhesive main agent polymer composed of a monomer including many hydrophilic groups so as to enhance permeableness of water within the pressure sensitive adhesive. In addition, by selecting a mixing weight ratio of the pressure sensitive adhesive main agent polymer, the permeableness can be further enhanced.

Abstract: 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.

Abstract: An SH wave type surface acoustic wave device includes a piezoelectric substrate and an IDT electrode provided on the piezoelectric substrate and constituted of Al or an alloy mainly containing Al and that uses a SH wave as an excitation wave. The piezoelectric substrate is a crystal plate in which a cut angle ? of a rotary Y cut quartz substrate is set in a range of ?64.0°<?<?49.3° in a counter-clockwise direction from a crystal axis Z and in which a surface acoustic wave propagation direction is set at 90°±5° with respect to a crystal axis X. An electrode film thickness H/? standardized by a wavelength of the IDT electrode is 0.04<H/?<0.12, where ? is a wavelength of the surface acoustic wave to be excited, and a main surface of the piezoelectric substrate is etched by a thickness of 0.002 ?m or more.

Abstract: An AT cut quartz crystal resonator element includes a quartz crystal element piece having an exciting part formed from an AT cut quartz crystal plate in a rectangular shape having an X-axis direction of a quartz crystal set to a long side, and an exciting electrode formed on each of front and back main surfaces of the exciting part, in which each side surface in the longitudinal direction of the exciting part is composed of two faces, an m-face of a quartz crystal and a crystal face other than the m-face.

Abstract: An optical system of an atomic oscillator that regulates an oscillation frequency by using an optical absorption property by one of a double resonance method utilizing light and micro waves and a coherent population trapping (CPT) method utilizing a quantum interference effect produced by two kinds of resonance light, includes: a light source emitting the resonance light; a gas cell disposed at an emitting side of the light source, sealing a gaseous metal atom therein and transmitting the resonance light through a metal atom gas; a light detecting unit detecting the transmitted light that is transmitted through the metal atom gas; and a fluorescence blocking unit blocking at least a part of fluorescence, which is emitted from the metal atom gas to the light detecting unit, and disposed between the metal atom gas and the light detecting unit.

Abstract: A flexural vibration piece includes a base, and a vibrating arms extending therefrom, each pair of vibrating arms has a first groove formed in the extension direction of the vibrating arm in one main surface following the direction in which the pair of vibrating arms are aligned, and a second groove formed side by side to the first groove in another main surface, the sum of the depths of the first and second groove portions is greater than the interval between the one main surface and the other main surface, and a mass portion is provided on each of the pair of vibrating arms, on the one main surface which is the opening side of the first grooves formed toward the outer sides opposite the inner sides on which the vibrating arms face each other.

Abstract: A pressure sensor includes a housing, a pressure input orifice opened on a pipe sleeve formed on the housing, a diaphragm that seals the pressure input orifice and has one face as a pressure receiving face, a force transmitting unit connected to a central area of the other face of the diaphragm in the housing, and a pressure sensitive element whose detection direction of a force is a detection axis. A displacement direction and the detection axis of the force transmitting unit are roughly orthogonal to the pressure receiving face. One end and the other end of the pressure sensitive element are respectively fixed to the housing and the force transmitting unit with an adhesive therebetween, and the adhesive is an inorganic adhesive.

Abstract: A laminated plate having a wider bandwidth at a desired retardation is provided. A laminated wave plate 1 includes a first wave plate 2 and a second wave plate 3 that are laminated to each other so that respective optical axes of the first wave plate and the second wave plate intersect each other at an angle of 51.5 degrees when the first wave plate has a retardation ?1 of 360 degrees and an in-plane azimuth of ?8 degrees, while the second wave plate has a retardation ?2 and an in-plane azimuth of 43.5 degrees. Thus, the laminated wave plate 1 functions as a desired retardation ?2 in a wavelength from 600 nm to 800 nm as a whole.

Abstract: An inertial sensor, comprises a detection element detecting an amount of a physical quantity in a detection axis direction, a plurality of support members having flexibility and supporting nearly a center of the detection element, and a package substrate housing the detection element and the plurality of support members. In a case when an X-axis is defined as an extending direction of the plurality of support members, a Y-axis is perpendicular to the X-axis in a plane including the detection element, and a Z-axis is perpendicular to the X-axis and the Y-axis, one of load components in a direction of the Y-axis of the detection member applied to the plurality of support members is nearly equal to other among the plurality of support members, and one of load components in a direction of the Z-axis is nearly equal to the other among the plurality of support members.

Abstract: A piezoelectric device includes: a piezoelectric resonator element; a package storing the piezoelectric resonator element therein in a manner to mount the piezoelectric resonator element on a base portion thereof composed of at least three layers that are layered; and a through hole penetrating through the base portion. In the device, the through hole includes a first hole formed on a first layer which is positioned to face the piezoelectric resonator element among the three layers; a second hole formed on a second layer contacting with the first layer; a third hole formed larger than the second hole on a third layer contacting with the second layer; and a metal coat formed on an inner wall surface of the second hole, and a sealing part for sealing the package is formed with a sealant in at least the second hole.

Abstract: A piezoelectric oscillator includes: a piezoelectric resonator including a container, the container containing a piezoelectric resonator element: and a semiconductor device including an oscillation circuit for vibrating the piezoelectric resonator. The semiconductor device is bonded to a surface of the container. The container has an external coupling terminal and a cut-off part, the external coupling terminal being coupled to the semiconductor device, the cut-off part being disposed on a side surface of the container. The external coupling terminal is disposed in an area of the container, the area being opposed to the semiconductor device, and in the cut-off part. The semiconductor device has a coupling terminal on a surface thereof, the surface being opposed to the container. The coupling terminal of the semiconductor device and the external coupling terminal of the container are coupled with a conductive material.

Abstract: An AT cut quartz crystal resonator element includes a quartz crystal element piece having an exciting part formed from an AT cut quartz crystal plate in a rectangular shape having an X-axis direction of a quartz crystal set to a long side, and an exciting electrode formed on each of front and back main surfaces of the exciting part, in which each side surface in the longitudinal direction of the exciting part is composed of two faces, an m-face of a quartz crystal and a crystal face other than the m-face.

Abstract: 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.

Abstract: A method for manufacturing a piezoelectric resonator element from a substrate made of piezoelectric material is provided. The method includes forming a first dry etching mask in a first masking region of a first surface of the substrate in a first mask forming process and performing a first dry etching process to remove a portion of the substrate in areas between the first dry etching mask after the first mask forming process. The method further includes maintaining a first un-etched portion of the substrate between the first dry etching mask after the first dry etching process and removing the first dry etching mask in a mask removing process after the first dry etching process. A wet etching process is performed to remove the first un-etched portion of the substrate after the mask removing process, thereby forming the piezoelectric resonator element.

Abstract: An angular velocity detection apparatus (i.e., physical quantity detection apparatus) includes a gyro sensor element (i.e., physical quantity detection element) that allows an angular velocity detection signal that corresponds to the magnitude of an angular velocity (i.e., physical quantity) and a leakage signal of vibrations based on a drive signal (square-wave voltage signal) to flow through a detection electrode, a driver circuit that generates the drive signal, a synchronous detection circuit that performs a synchronous detection process on a detection target signal that includes the angular velocity detection signal and the leakage signal based on a detection signal that is synchronized with the drive signal, and a phase change circuit that changes a relative timing of at least one of a rising edge and a falling edge of the detection signal with respect to the detection target signal based on a control signal so that at least part of the leakage signal is output by the synchronous detection process.

Abstract: A pressure sensor includes: a diaphragm having a pressure-receiving portion receiving a pressure and a thick portion adjacent to the pressure-receiving portion; and a pressure sensitive element having a first and a second ends facing each other. The pressure sensitive element extends in a direction intersecting the thick portion and the first end of the pressure sensitive element is bonded to a pressure-receiving surface of the pressure-receiving portion, and a central portion of a portion at which the pressure-receiving portion and the first end are bonded is positioned at a side closer to the second end of the pressure sensitive element than a center of the pressure-receiving portion.

Abstract: A piezoelectric resonator includes a piezoelectric resonator element having a resonating arm and a metal film that is formed on the resonating arm; a package including a bottom part on which the piezoelectric resonator element is fixed and a frame wall that surrounds the bottom part, and having an opening above the bottom part; and a lid including a frame in which a through hole is provided and an optically transparent part that has an upper face and a lower face of the frame and is disposed at the through hole, the through hole penetrating a front face and a back face, the lower face of the optically transparent part being disposed so as to oppose the metal film, and the lid closing the opening of the package such that the lid overlaps with the bottom part and the frame wall, the through hole having a curved inner wall face whose curved face is coupled with at least one of the front face and the back face at least one opening edge of the front face and the back face and a vertical inner wall face that is pro

Abstract: There is provided a multilayered phase difference plate that serves as a half-wavelength phase difference plate in the range of 400 nm to 700 nm by bonding together a first phase difference plate and a second phase difference plate in a manner that their respective optical axes intersect each other. The multilayered phase difference plate obtains a high incident light polarization conversion efficiency because the respective plate thicknesses of the first and second phase difference plates are within a range such that phase difference deviation amounts become offset by each other.

Abstract: A piezoelectric oscillator includes: a piezoelectric resonator; an oscillation circuit including a variable resistance circuit and a transistor for oscillation; a constant current circuit, the constant current circuit including a first current mirror circuit, and a current control circuit having an output terminal and controlling a current flowing in the first current circuit so as to enable an output current of the constant current circuit to be adjusted, the output terminal of the first current mirror circuit being coupled to at least one of a collector and a base of the transistor for oscillation with the variable resistance circuit; and a control circuit coupled to the current control circuit and the variable resistance circuit, the control circuit controlling the current control circuit and a resistance value of the variable resistance circuit.

Abstract: A gyro module includes: two gyro element pieces outputting a signal, the signal being obtained by combining a signal of an angular velocity of a first detection axis and a signal of an angular velocity of a second detection axis; and an arithmetic circuit for performing an addition and a subtraction with respect to the signal outputted from the two gyro element pieces. The two gyro element pieces are a first gyro element piece and a second gyro element piece. The first and second gyro element pieces are arranged such that a detection sensitivity polarity of the first detection axis of the first gyro element piece is same as that of the second gyro element piece, and a detection sensitivity polarity of the second detection axis of the first gyro element piece and that of the second gyro element piece are inverted.