摘要:
In a longitudinally coupled multi-mode piezoelectric bulk wave filter, a laminated piezoelectric body obtained by overlapping a plurality of excitation electrodes with piezoelectric layers therebetween and piezoelectric portions aligned with the laminated piezoelectric body are integrated. The thickness of each of the piezoelectric portions is greater than the thickness of the laminated piezoelectric body. The input electrode, the output electrode, and the ground electrode are connected to the respective excitation electrodes of the piezoelectric body. When an input signal is applied between the input electrode and the ground electrode, harmonics, with a plurality of different orders of vibrations, using the piezoelectric longitudinal effect are efficiently generated and are combined to produce the filter characteristic.
摘要:
An electronic component includes a package member; a via hole electrode extending through the package member and protruding from a first surface of the package member; an electronic component located on the first surface of the package member with a space located between the package member and the electronic component. The space between the electronic component and the first surface of the package member is provided by a protruding portion of the via hole electrode which extends from the surface of the package member and a joining member joining the electronic component with the via hole electrode.
摘要:
A vehicle door latch device comprises a block member (66) displaceable between a blocking position (B) for restricting a displacement of a lock lever (23) to an unlocked position (UL) by a mechanical engagement with the lock lever (23) and an unblocking position (UB), a connecting lever (72) connected to an inside lock button (36) with no substantial lost-motion, and a connecting spring (73) for connecting the connecting lever (72) and the lock lever (23). The connecting lever (72) is substantially displaceable integrally with the lock lever (23) by an action of the connecting spring (73) when the block member (66) is located at the unblocking position (UB). The connecting lever (72) is displaced with respect to the lock lever (23) against a spring force of the connecting spring (73) when the unlocking operation of the inside lock button (36) is carried out at a state where the block member (66) is located at the blocking position (B).
摘要:
A method and apparatus for exposing an image of a pattern formed in a mask onto a sensitive substrate. The mask is irradiated with an irradiation light. Data is computed relating to the thermal expansion saturation point of the mask due to absorption of the irradiation light. The mask is expanded to the thermal expansion saturation point based on the computed data, and the image of the mask pattern is exposed onto the sensitive substrate.
摘要:
A piezoelectric resonator having a small spurious resonance and a large difference .DELTA.F between the resonant frequency and the antiresonant frequency has a compact size and an external electrode has a structure which prevents damage or breaking of the external electrode. The piezoelectric resonator has a substantially rectangular-parallelepiped base member which includes a plurality of laminated piezoelectric layers. A middle portion of the piezoelectric layers is polarized in opposite directions relative to each other. On main surfaces of the middle part of the piezoelectric layers, first and second groups of inner electrodes and are exposed alternately at both side surfaces of the base member. On both side surfaces of the base member, first and second external electrodes are arranged so as to alternately connect to the first and second groups of inner electrodes.
摘要:
A piezoelectric resonator has a substantially rectangular-parallelpiped-shaped base member including a plurality of laminated piezoelectric layers. The piezoelectric layers have different dimensions in the longitudinal direction of the base member. The piezoelectric layers are polarized in the longitudinal direction of the base member such that the direction of polarization differs at every other piezoelectric layer. At both surfaces of the piezoelectric layers, a plurality of internal electrodes are disposed. The internal electrodes are alternately covered by at least two insulating films disposed on opposing side surfaces of the base member such that the at least two insulating films cover different electrodes. External electrodes are provided on the opposing side surfaces of the base member and the external electrodes are connected to internal electrodes.
摘要:
Disclosed is a piezoelectric resonator device. This piezoelectric resonator device comprises a piezoelectric substrate having an almost rectangular plane shape. The piezoelectric substrate is provided with a slit extending to the inside from one edge of the piezoelectric substrate, for forming a tuning fork portion, and a pair of slits for separating the tuning fork portion, spaced apart from the slit forming the tuning fork portion by a predetermined distance on both sides of the slit forming the tuning fork portion, and approximately parallel with the slit forming the tuning fork portion. Vibrating electrodes are formed on both major surfaces of the piezoelectric substrate at a piezoelectric vibrating portion, between the slits separating the tuning fork portion from non-vibrating portions of the substrate.
摘要:
A door locking device with an antitheft mechanism comprises a main lock lever linked to a key cylinder and changed over from an unlock position to an antitheft position through a lock position, a sub lock lever linked to an inside lock button of the door and changed over to an unlock position and a lock position, and a linkage member having sufficient elasticity to connect the lock levers with each other between the lock position and unlock position. As the main lock lever is displaced from the lock position to the antitheft position the linkage member is elastically deformed and permits the sub lock lever to be left at the lock position, and as the main lock lever is displaced to the antitheft position the sub lock lever is composed so that it can not change over the main lock lever.
摘要:
An acceleration sensor includes a sensor body obtained by forming first and second signal electrodes on outer major surfaces of first and second piezoelectric ceramic plates which are pasted to each other through an intermediate electrode. The sensor body is formed to be mechanically supported in the form of a center beam, and has first to third regions formed so that stress is caused in different directions in adjacent ones of the first to third regions upon acceleration. The first and second piezoelectric ceramic plates are polarized in opposite directions in the second region so that charges which are opposite in polarity to charges generated in the second region are not drawn from the signal electrodes in the first and third regions.
摘要:
An acceleration sensor includes a circuit board having an acceleration signal output electrode and a ground electrode formed on its one major surface, a piezoelectric element fixed on the acceleration signal output electrode, a conductive member fixed on the ground electrode, and a weight member mounted in a crosslinked manner and fixed on the conductive member and the piezoelectric element, and wherein the piezoelectric element is so arranged that its axis of polarization is in a direction along the direction in which acceleration is applied, and the weight member is so constructed that its one surface in contact with the piezoelectric element and the conductive member has conductivity.