摘要:
A bonded body includes a supporting body composed of a ceramic, a bonding layer provided over a surface of the supporting body and composed of one or more material selected from the group consisting of mullite, alumina, tantalum pentoxide, titanium oxide and niobium pentoxide, and a piezoelectric single crystal substrate bonded with the bonding layer. The surface of the supporting body has an arithmetic average roughness Ra of 0.5 nm or larger and 5.0 nm or smaller.
摘要:
The present invention provides a MEMS and a sensor having the MEMS which can be formed without a process of etching a sacrifice layer. The MEMS and the sensor having the MEMS are formed by forming an interspace using a spacer layer. In the MEMS in which an interspace is formed using a spacer layer, a process for forming a sacrifice layer and an etching process of the sacrifice layer are not required. As a result, there is no restriction on the etching time, and thus the yield can be improved.
摘要:
Methods of preventing water from penetrating inside a pair of bonded wafers that are bonded to one another during manufacture of an electronic device. A method is provided for manufacturing an electronic device including a first substrate having a first side wall of a certain height formed along a periphery to surround an electronic circuit disposed on a bottom surface and a second substrate having a second side wall of a certain height formed along a periphery on a top surface, the second side wall being aligned and bonded with the first side wall. The method includes forming the first side wall on a bottom surface of a first wafer as the bottom surface of the first substrate and forming a first sealing portion of a certain height along a periphery; forming the second side wall on a top surface of a second wafer as the top surface of the second substrate and forming a second sealing portion of a certain height along a periphery; and aligning and bonding the first wafer and the second wafer with each other, the first sealing portion and the first side wall being bonded with the second sealing portion and the second side wall respectively by transient liquid phase bonding.
摘要:
Methods of manufacturing an electronic device formed in a cavity may include providing a first substrate having a first side wall including a first metal formed along a periphery on a bottom surface thereof and surrounding an electronic circuit disposed on the bottom surface, providing a second substrate having a second side wall including a second metal and a third metal formed along a periphery on a top surface thereof, aligning the first substrate with the second substrate with the first side wall opposing and contacting the second side wall to internally define a cavity between the bottom surface of the first substrate, the top surface of the second substrate, the first side wall ,and the second side wall, and heating and bonding the first substrate and the second substrate by transient liquid phase bonding.
摘要:
An acoustic wave device includes: a mounting substrate; a first wiring layer located on an upper surface of the mounting substrate, the first wiring layer including a first bond region and a first connection region connecting with the first bond region and having a thickness substantially equal to a thickness of the first bond region; an element substrate mounted on the mounting substrate; an acoustic wave element located on a lower surface of the element substrate; and a second wiring layer located on the lower surface of the element substrate, the second wiring layer including a second bond region and a second connection region, the second bond region directly bonding with the first bond region of the first wiring layer, the second connection region connecting the acoustic wave element with the second bond region and having a thickness substantially equal to a thickness of the second bond region.
摘要:
A piezoelectric actuator array includes a substrate plate with a number of signal leads and at least one common lead, and a number of piezoelectric bodies arranged in a row on one surface of the substrate plate and formed by dividing a common piezoelectric block. The piezoelectric bodies include a number of active bodies each of which has, on a first side of the row, a signal electrode in contact with one of the signal leads and, on an opposite second side of the row, a common electrode in contact with the common lead. The substrate plate has at least one connector lead disposed on the first side of the row and electrically connected to the common lead on the second side of the row. At least one piezoelectric body has a conductive outer surface layer that establishes an electrically conductive path from the connector lead to the common lead.
摘要:
A piezoelectric device includes a piezoelectric vibrating piece, a base, a wire, a conductive adhesive, and a buffer layer. The piezoelectric vibrating piece includes excitation electrodes and extraction electrodes at both principal surfaces. The base includes the piezoelectric vibrating piece and a first wiring electrode and a second wiring electrode connected to the extraction electrodes. The wire connects the extraction electrode on a surface opposite to a side of the base among the extraction electrodes to one wiring electrode of the first wiring electrode and the second wiring electrode. The conductive adhesive connects the extraction electrode at the base side among the extraction electrodes to the other wiring electrode among the first wiring electrode and the second wiring electrode. The buffer layer reduces stress of the wire between the extraction electrode to which the wire is connected and the piezoelectric vibrating piece.
摘要:
A method of fabricating an acoustic wave device includes: bonding a support substrate to a piezoelectric substrate on which an IDT is to be formed; forming a modified region in the support substrate by irradiation of a laser beam; and cutting the support substrate and the piezoelectric substrate in the modified region, wherein a distance from a boundary face between the support substrate and the piezoelectric substrate to an edge portion of the modified region at the boundary face side is greater than or equal to 20 μm and less than 69 μm.
摘要:
An electromechanical transformation device for an ultrasonic flow meter comprises an alkaline niobate piezoelectric ceramic composition and a rigid body adhered onto the major surface of the ceramic composition. The ceramic composition is made of crystal structures such as orthorhombic crystals formed at the side where the temperature is lower than the orthorhombic-to-tetragonal phase transition temperature, tetragonal crystals formed at the side where temperature is higher that the orthorhombic-to-tetragonal phase transition temperature as well as at the side where the temperature is lower than the tetragonal-to-cubic phase transition temperature, and the cubic crystals formed at the side where the temperature is higher than the tetragonal-to-cubic phase temperature. Young's modulus of the rigid is 60 GPa or more. THe volume percent of the ceramic composition existing within a range where the distance from the adhesion point of the piezoelectric ceramic composition and the rigid body is 40% or more.
摘要:
A piezoelectric device that prevents defects due to pyroelectric charge without limiting how the piezoelectric device can be used includes a first metal layer located on a bonding surface of a piezoelectric single crystal substrate. A second metal layer is located on a bonding surface of a support substrate. The first and second metal layers are overlaid on each other to define a metal bonded layer. Subsequently, by oxidizing the metal bonded layer, a semi-conducting layer is formed.