摘要:
In an ultrathin piezoelectric resonator including an ultrathin vibratory portion and thick frame-like marginal portion formed integrally therewith for supporting it around, an electrode and an electrode lead pattern extending therefrom are provided on one surface of the vibratory portion and an electrode is provided on the other surface of the vibratory portion in an area except at least an area corresponding to the electrode lead pattern, thereby preventing that a capacitor is formed between the electrode and the electrode pattern deposited on the opposite surfaces of the vibratory portion and increases the parallel capacitance of the resonator. The electrode lead pattern is formed narrow to reduce an ohmic loss and suppress a spurious resonance. A through hole is made in the frame-like marginal portion and extends therethrough in its thickwise direction. By electrically connecting via the through hole an electrode lead portion on one surface of the frame-like marginal portion and a terminal pad on the other surface thereof, it is possible to ensure good conduction between a conductive film on the bottom of a resonator package and the electrode on the said other surface of the vibratory portion on the side where a cavity is provided.
摘要:
Since split electrodes are disposed along the x-axis of an AT cut quartz crystal plate on its ultrathin vibratory portion formed integrally with a thick frame-like marginal portion surrounding it, desired acoustic coupling can be obtained although the split electrodes are disposed closely to such an extent as not to cause shorting between them. It is therefore possible to obtain, with a satisfactory yield, filter elements which have center frequencies in the range greater than about ten megahertz and sufficiently wide passbands.
摘要:
In a resonator which has an ultrathin vibratory portion formed integrally with a thick frame-like rib surrounding it, a pair of opposed thick marginal portions of the frame-like rib are formed so that their widths gradually decreases toward another marginal portion of the rib from the other remaining one perpendicular to the above-noted pair of opposed marginal portions and to be fixed to a resonator case. This structure substantially increases the mechanical strength of the piezoelectric resonator, even if it is held in a cantilever fashion, and protects it from breakage by an external vibration or shock.
摘要:
In a piezoelectric resonator having an ultrathin vibratory portion formed by a cavity made in a piezoelectric block and a thick frame-like rib formed integrally with said vibratory portion and surrounding it, an excess adhesive receiving groove or the like is cut in one marginal portion of the frame-like rib between an adhesive coated region. The resonator is fixedly housed in a package by use of an adhesive coated on one marginal portion of the frame-like rib along the z-axis direction, or by means of elastic pawls without using the adhesive. In this case, one marginal portion of the frame-like rib on the opposite side from a pad deposited on one side of the piezoelectric resonator is bonded to the bottom of the package. With such a structure, it is possible to prevent the adhesive from flowing into the cavity to cause variations in the resonance frequency of the piezoelectric resonator, to reduce the scatter of the temperature-frequency characteristic of a piezoelectric device using the resonator housed in a package during mass production, and to increase the bond strength of wire bonding for electrical connection of the piezoelectric resonator incorporated in the package.
摘要:
A piezoelectric resonating element includes a piezoelectric substrate that includes a rectangular vibrating section and a thick section integrally formed with the vibrating section, excitation electrodes, and lead electrodes. The thick section includes a first thick section and a second thick section of which one end is formed continuous to the first thick section. The first thick section includes a first inclined section of which the thickness changes and a first thick section main body of a quadrangle column shape, and at least one slit is provided in the first thick section.
摘要:
A white light-emitting device using a fluorescent fiber includes a blue semiconductor light-emitting element (2) for emitting an excitation light (a), and an optical fiber (3) having one side end face and the other side end face, the excitation light (a) emitted from the blue semiconductor light-emitting element (2) being made incident to the one side end face to be guided to the other side end face. The optical fiber (3) includes a core containing therein a phosphor for emitting wavelength conversion lights by being excited by the excitation light (a) received from the blue semiconductor light-emitting element (2), and a cladding member (3B) having a light emission surface in its peripheral surface, at least a part of optically multiplexed lights, which are obtained by optically multiplexing the wavelength conversion lights and the excitation light, being emitted through the light emission surface.
摘要:
Electromagnetic noise absorbing material and filter, which are small, light, and effective even with respect to unwanted electromagnetic waves of a few hundred MHz or more, are provided. A small and flexible electromagnetic noise filter cable and tape-shaped electromagnetic noise filter, as well as a manufacturing method and manufacturing apparatus therefor, are also provided. The electromagnetic noise absorbing material has a thickness or particle diameter of the alloy magnetic substance which is within a range of from 1/10 to 10 times the skin depth thereof, and thereby, a large eddy current loss can be generated, so that it is possible to manufacture electromagnetic noise filters having various shapes, which are small, light, and which realize a large electromagnetic noise suppression effect as a result of eddy current loss, and these possess a large relative magnetic permeability even at levels of a few hundred MHz or more. According to the thin film manufacturing method and apparatus, it is possible to easily manufacture an electromagnetic noise absorbing material having small hysteresis, possessing a hard axis of uni-axial magnetic anisotropy, which is superior in high-frequency response, and has a large electromagnetic noise suppression effect.
摘要:
In a magnetic field sensing method in accordance with the invention of the present application, a magnetic sensor comprising a conductor and at least one magnetic material provided on any of the surfaces of this conductor, is employed. This magnetic sensor is disposed in the vicinity of an external magnetic field which is to be sensed, and by means of supplying a high frequency current to this conductor, the impedance of the conductor changes in accordance with the external magnetic field, and based on this, the external magnetic field is sensed.
摘要:
A plastic cap having a peripheral band 4 which is provided at the lower end of the skirt-like side wall portion of the cap body, wherein the lower end of the skirt-like side wall portion outwardly protrudes, the peripheral band 4 downwardly extends from the protruded portion 10 at the lower end via a breaking line 11 that is circumferentially formed leaving a plurality of bridges 12, a downwardly extending stopper piece 20 is disposed on the side of closing the cap with respect to at least one of the bridges 12, the stopper piece 20 comes into contact with the bridge 12 at the time of closing the cap, and the cap body and the peripheral band 4 turn together. There is no need of providing space for forming stoppers between the lower end of the skirt-like side wall and the upper end of the peripheral band portion. Therefore, the coupling portion between the two is easily formed by providing a breaking line in the subsequent working of cutting. The cap is integrally molded without the need of using a metal mold having complex surface shapes or a split mold, and the rate of production can be enhanced.
摘要:
.gamma.-Fe.sub.2 O.sub.3 film added at least one selected from the group consisting of Pd, Au, Pt, Rh, Ag, Ru, Ir, Os as additive, especially Os are disclosed. Reduction from .alpha.-Fe.sub.2 O.sub.3 to Fe.sub.3 O.sub.4 is accelerated by additive Os to accompany to a uniform reduction and increased the ratio of magnetic phase in the film. .gamma.-Fe.sub.2 O.sub.3 film medium added Os improves the saturation magnetization and increases the coercive force in proportion to amount of additive Os. Application of an external field to said film introduced magnetic anisotropy into said film, therefore said film medium improves coercive force and squareness of hysteresis loop by the grant of anisotropy. .gamma.-Fe.sub.2 O.sub.3 crystal grain is prepared by additive Os to obtained fine grain. The resultant .gamma.-Fe.sub.2 O.sub.3 film medium decreases the noise.
摘要翻译:公开了添加了选自Pd,Au,Pt,Rh,Ag,Ru,Ir,Os中的至少一种作为添加剂的γ-Fe 2 O 3膜。 通过添加剂Os可以促进从α-Fe2O3向Fe3O4的还原,从而均匀地还原并增加膜中磁相的比例。 添加的γ-Fe2O3膜介质可以提高饱和磁化强度,并且与添加剂的量成比例地增加矫顽力。 对所述膜施加外部场,将磁各向异性引入所述膜,因此所述膜介质通过赋予各向异性来提高磁滞回线的矫顽力和矩形度。 通过添加剂Os制备γ-Fe 2 O 3晶粒以获得细晶粒。 所得的γ-Fe2O3薄膜介质会降低噪音。