Abstract:
In an embodiment, the invention provides a method for forming a wafer-level package. A bonding pad is formed on a first wafer. After forming the bonding pad, an optoelectronic device is located on the first wafer. A gasket is formed on a second wafer. After a gasket is formed on a second wafer, the second wafer is attached to the first wafer with a bond between the gasket and the bonding pad.
Abstract:
Disclosed is an acoustic resonator that includes a substrate, a first electrode, a layer of piezoelectric material, a second electrode, and an alternating frame region. The first electrode is adjacent the substrate, and the first electrode has an outer perimeter. The piezoelectric layer is adjacent the first electrode. The second electrode is adjacent the piezoelectric layer and the second electrode has an outer perimeter. The alternating frame region is on one of the first and second electrodes.
Abstract:
An acoustic resonator that includes a substrate, a first electrode, a layer of piezoelectric material, a second electrode, and a fill region. The first electrode is adjacent the substrate, and the first electrode has an outer perimeter. The piezoelectric layer is adjacent the first electrode. The second electrode is adjacent the piezoelectric layer and the second electrode has an outer perimeter. The fill region is in one of the first and second electrodes.
Abstract:
An oscillator including a high tone bulk acoustic resonator (HBAR), a film bulk acoustic resonator (FBAR) filter and a method of fabrication are described.
Abstract:
A sensor senses an environmental condition. The sensor includes a film bulk acoustic resonator that includes a layer of material that causes resonant frequency and/or quality factor shifts of the film bulk acoustic resonator in response to changes in the environmental condition. The environmental condition may be relative humidity and the layer of material may be a moisture absorptive material.
Abstract:
An apparatus including vertically separated acoustic resonators are disclosed. The apparatus includes a first acoustic resonator on a substrate and a second acoustic resonator vertically separated above the first acoustic resonator. Because the resonators are vertically separated above another, total area required to implement the resonators is reduced thereby savings in die size and cost are realized. The vertically separated resonators are supported by standoffs that are fabricated on the substrate, or on a resonator.
Abstract:
Method for fabricating an acoustical resonator on a substrate having a top surface. First, a depression in said top surface is generated. Next, the depression is filled with a sacrificial material. The filled depression has an upper surface level with said top surface of said substrate. Next, a first electrode is deposited on said upper surface. Then, a layer of piezoelectric material is deposited on said first electrode. A second electrode is deposited on the layer of piezoelectric material using a mass load lift-off process.
Abstract:
A wafer-level package includes a first wafer comprising a bonding pad, an optoelectronic device on the first wafer, and a second wafer comprising a gasket. The second wafer is attached to the first wafer by a bond between the gasket and the bonding pad.
Abstract:
The acoustically-coupled transformer includes first and second stacked bulk acoustic resonators (SBARs), each having a stacked pair of film bulk acoustic resonators (FBARs) with an acoustic decoupler between them. In one embodiment, the acoustic decoupler comprises a layer of decoupling material has having a nominal thickness equal to an odd integral multiple of one quarter of the wavelength of an acoustic wave having a frequency equal to the transformer's center frequency. In another embodiment, the acoustic decoupler comprises a Bragg stack. Each FBAR has opposed planar electrodes with piezoelectric material between them. The transformer additionally has first terminals, second terminals, a first electrical circuit connecting one FBARs of the first SBAR to one FBAR of the second SBAR and the first terminals, and a second electrical circuit connecting the other FBAR of the first SBAR to the other FBAR of the second SBAR and the second terminals.
Abstract:
A method for fabricating an apparatus, and an apparatus embodying the same is disclosed. First a device chip having circuit elements is fabricated. Next, a cap with a cap circuit is fabricated. Finally, the cap is placed on the device chip to connect a first contact point with a second contact point using the connector on the cap. The apparatus includes a device chip and a cap. The device chip has the first contact point and a second contact point. The cap has the cap circuit that, when the cap is placed on the device chip, connects the first contact point with the second contact point.