摘要:
An acoustic wave device is disclosed. The acoustic wave device includes a support layer, a ceramic layer positioned over the support layer, a piezoelectric layer positioned over the ceramic layer, and an interdigital transducer electrode positioned over the piezoelectric layer. The support layer has a higher thermal conductivity than the ceramic layer. The ceramic layer can be a polycrystalline spinel layer. The acoustic wave device can be a surface acoustic wave device configured to generate a surface acoustic wave.
摘要:
An acoustic wave device is disclosed. The acoustic wave device includes a support layer, a ceramic layer positioned over the support layer, a piezoelectric layer positioned over the ceramic layer, and an interdigital transducer electrode positioned over the piezoelectric layer. The support layer has a higher thermal conductivity than the ceramic layer. The ceramic layer can be a polycrystalline spinel layer. The acoustic wave device can be a surface acoustic wave device configured to generate a surface acoustic wave.
摘要:
An elastic wave device includes a supporting substrate, an acoustic multilayer film on the supporting substrate, a piezoelectric substrate on the acoustic multilayer film, and an IDT electrode on the piezoelectric substrate. An absolute value of a thermal expansion coefficient of the piezoelectric substrate is larger than an absolute value of a thermal expansion coefficient of the supporting substrate. The acoustic multilayer film includes at least four acoustic impedance layers. The elastic wave device further includes a bonding layer provided at any position in a range of from inside the first acoustic impedance layer from the piezoelectric substrate side towards the supporting substrate side, to an interface between the third acoustic impedance layer and the fourth acoustic impedance layer.
摘要:
A compound acoustic wave filter device comprises a support substrate having an including two or more circuit connection pads. An acoustic wave filter includes a piezoelectric filter element and two or more electrodes. The acoustic wave filter is micro-transfer printed onto the support substrate. An electrical conductor electrically connects one or more of the circuit connection pads to one or more of the electrodes.
摘要:
An elastic wave device includes a first elastic wave element, a second elastic wave element, and a first substrate. The first elastic wave element includes a first piezoelectric substrate. The second elastic wave element includes a second piezoelectric substrate. The second piezoelectric substrate is stacked on the first piezoelectric substrate. A coefficient of linear expansion of the second piezoelectric substrate is greater than a coefficient of linear expansion of the first piezoelectric substrate. The first substrate is bonded to the second piezoelectric substrate. A coefficient of linear expansion of the first substrate is lower than the coefficient of linear expansion of the second piezoelectric substrate.
摘要:
An elastic wave device includes a first elastic wave element, a second elastic wave element, and a first substrate. The first elastic wave element includes a first piezoelectric substrate. The second elastic wave element includes a second piezoelectric substrate. The second piezoelectric substrate is stacked on the first piezoelectric substrate. A coefficient of linear expansion of the second piezoelectric substrate is greater than a coefficient of linear expansion of the first piezoelectric substrate. The first substrate is bonded to the second piezoelectric substrate. A coefficient of linear expansion of the first substrate is lower than the coefficient of linear expansion of the second piezoelectric substrate.
摘要:
A supporting substrate and a piezoelectric substrate are prepared. A surface of the supporting substrate is bonded to the backside of the piezoelectric substrate with an organic adhesive layer interposed therebetween to form a laminated substrate. Subsequently, a peripheral surface of the laminated substrate is ground such that a peripheral surface of the piezoelectric substrate, a peripheral surface of the organic adhesive layer, and a peripheral surface of the supporting substrate on the side of the organic adhesive layer are made flush with each other. Subsequently, the surface of the piezoelectric substrate is polished to reduce the thickness of the piezoelectric substrate and performing mirror polishing of the surface.
摘要:
A device, comprising a substrate having opposing first and second surfaces, a first surface acoustic wave resonator disposed on the first surface of the substrate, a second surface acoustic wave resonator disposed on the second surface of the substrate, a first adhesive layer sandwiched between the first surface acoustic wave resonator and the substrate, and a second adhesive layer sandwiched between the second surface acoustic wave resonator.
摘要:
A capped chip is provided in which a cap member has a bottom surface facing a front surface of the chip and a top surface opposite the front surface. A plurality of through holes is desirably provided in the cap member which extend from the bottom surface to the top surface. A plurality of metallic interconnects electrically connected to the chip are provided which project upwardly from the front surface of the chip at least partially through the through holes. Desirably, the metallic interconnects include stud bumps.
摘要:
Capped chips and methods of forming a capped chip are provided in which electrical interconnects are made by conductive elements which extend from bond pads of a chip at least partially through a plurality of through holes of a cap. The electrical interconnects may be solid, so as to form seals extending across the through holes. In some cases, stud bumps extend from the bond pads, forming parts of the electrical interconnects. In some cases, a fusible conductive medium forms a part of the electrical interconnects.