Skyworks Solutions, Inc.

Gong Bin Tang

Rei Goto

Keiichi Maki

Hiroyuki Nakamura

Jiansong Liu

Yosuke Hamaoka

Benjamin Paul Abbott

Chun Sing Lam

Jie Zou

Chih-Ming Lin

David Richard Pehlke

William John Domino

Paul T DiCarlo

Hironori Fukuhara

Grant Darcy Poulin

Kyohei Kobayashi

Yulin Huang

An acoustic wave device includes a piezoelectric layer and an interdigital transducer electrode disposed over the piezoelectric layer. The interdigital transducer electrode is thicker in a center region of the interdigital transducer electrode than in a gap region of the interdigital transducer electrode to thereby reduce a mass loading of the interdigital transducer electrode in the gap region. The interdigital transducer electrode has a layer of more dense material disposed of a layer of less dense material.

Acoustic wave device with multi-layer interdigital transducer electrode having layer of more dense material over layer of less dense material

Aspects of this disclosure relate to a surface acoustic wave device. The surface acoustic wave device includes a piezoelectric layer and an interdigital transducer. The interdigital transducer electrode includes a pair of electrodes, each electrode having a bus bar and fingers extending from the bus bar. The interdigital transducer electrode has an interdigital region defined by a portion of the fingers of the electrodes that interdigitate with each other. A dielectric layer is disposed over the interdigital transducer electrode outside the interdigital region and configured to reduce a loss of the surface acoustic wave device.

Surface acoustic wave device

Aspects of this disclosure relate to a filter that includes an acoustic wave device with a multi-layer substrate with heat dissipation. The multi-layer substrate includes a support substrate (e.g., a quartz substrate), a piezoelectric layer, an interdigital transducer electrode on the piezoelectric layer, and a thermally conductive layer configured to dissipate heat associated with the acoustic wave device. The thermally conductive layer is disposed between the support substrate and the piezoelectric layer. The thermally conductive layer has a thickness that is greater than 10 nanometers and less than a thickness of the piezoelectric layer.

Acoustic wave device with multi-layer piezoelectric substrate with heat dissipation

An acoustic wave filter includes a piezoelectric layer. A first acoustic wave device includes a portion of the piezoelectric layer and a first multi-layer interdigital transducer electrode disposed over the first portion of the piezoelectric layer. Additional acoustic wave devices are coupled to the first acoustic wave device, the additional acoustic wave devices including a second portion of the piezoelectric layer and a plurality of multi-layer interdigital transducer electrodes disposed over the second portion of the piezoelectric layer. At least one of the plurality of multi-layer interdigital transducer electrodes includes a layer that is thinner than a corresponding layer of the same material of the first multi-layer interdigital transducer electrode of the first acoustic wave device.

Acoustic wave filter with multiple acoustic wave devices on a subtrate

A surface acoustic wave device has a piezoelectric substrate having a cut angle (e.g., the piezoelectric angle is cut so as to have a crystal orientation) that allows the surface acoustic wave device to operate as a longitudinally leaky surface acoustic wave device that confines the acoustic wave energy within the piezoelectric substrate and that has less propagation attenuation and a higher electromechanical coupling coefficient k.

Multilayer piezoelectric substrate for acoustic wave device

An acoustic wave device includes a piezoelectric layer and an interdigital transducer electrode disposed over the piezoelectric layer. The interdigital transducer electrode is thicker in a center region of the interdigital transducer electrode than in a gap region of the interdigital transducer electrode to thereby reduce a mass loading of the interdigital transducer electrode in the gap region. The interdigital transducer electrode has a layer of less dense material disposed of a layer of more dense material.

Acoustic wave device with multi-layer interdigital transducer electrode

An acoustic wave device, a method of manufacture of the same, and a radio frequency filter including the same. The acoustic wave device comprises a multilayer piezoelectric substrate (MPS) including a layer of piezoelectric material having a lower surface disposed on an upper surface of a layer of a dielectric material having a lower surface disposed on an upper surface of a carrier substrate. An interdigital transducer (IDT) is disposed on the multilayer piezoelectric substrate and includes an active region configured to generate an acoustic wave. First and second high impedance portions are included within the multilayer piezoelectric substrate, the first and second high impedance portions each positioned outside the active region of the interdigital transducer and extending in the direction of propagation of the acoustic wave to be generated by the interdigital transducer. The first and second high impedance portions reduce side leakage and suppress transverse modes.

Multilayer piezoelectric substrate with reduced side leakage and transverse mode suppression

Filter modules having a wider passband are provided herein. In certain embodiments, the filter module comprises an input node; an output node; a filter disposed along a signal path extending from the input node to the output node; a strip line configured to generate an inductance between the filter and a ground such to increase a bandwidth of a passband of the filter module, the single strip line disposed on multiple layers, each of the multiple layers defined by a plurality of pulse-shaped) portions of the strip line disposed on a plane.

Filter module with widened passband

Reconfigurable patch antenna systems are provided herein. In certain embodiments, a mobile device includes a patch antenna configured to handle a radio frequency signal at a signal feed. The patch antenna includes a plurality of antenna segments. The front-end system further includes a plurality of switches each configured to control connection of a respective one of the first plurality of antenna segments to the first signal feed, and a control circuit configured to control the plurality of switches to provide a frequency adjustment to the patch antenna.

Patch antenna with reconfigurable size for frequency control

Aspects of this disclosure relate to a surface acoustic wave resonator having a multi-layer substrate with heat dissipation. The multi-layer substrate includes a support substrate, a piezoelectric layer, and a thermally conductive layer configured to dissipate heat associated with the surface acoustic wave resonator. The thermally conductive layer is disposed between the support substrate and the piezoelectric layer. Related surface acoustic wave filters, radio frequency modules, and wireless communication devices are also disclosed.

Surface acoustic wave resonator with multi-layer piezoelectric substrate with heat dissipation

Piston mode Lamb wave resonators are disclosed. A piston mode Lamb wave resonator can include a piezoelectric layer, such as an aluminum nitride layer, and an interdigital transducer on the piezoelectric layer. The piston mode Lamb wave resonator has an active region and a border region, in which the border region has a velocity with a lower magnitude than a velocity of the active region. The border region can suppress a transverse mode.

Piston mode lamb wave resonators

An acoustic wave device that includes a spinel layer, a piezoelectric layer and an interdigital transducer electrode on the piezoelectric layer is disclosed. The piezoelectric layer is disposed between the interdigital transducer electrode and the spinel layer. The acoustic wave device is configured to generate an acoustic wave having a wavelength of &#x3bb;. The piezoelectric layer can have a thickness than is less than &#x3bb;. In some embodiments, the acoustic wave device can include a temperature compensating layer that is disposed between the piezoelectric layer and the spinel layer.

Acoustic wave device with spinel layer and temperature compensation layer

A surface acoustic wave (SAW) resonator comprises a plurality of interdigital transducer electrodes disposed on a multilayer piezoelectric substrate (MPS) including a layer of piezoelectric material having a lower surface bonded to an upper surface of a layer of a second material different from the piezoelectric material that improves the temperature stability and reliability of the SAW resonator, and a layer of dielectric material disposed on an upper surface of the interdigital transducer electrodes and MPS.

Multilayer piezoelectric substrate

A surface acoustic wave (SAW) resonator comprises a plurality of interdigital transducer (IDT) electrodes disposed on a multilayer piezoelectric substrate including a layer of piezoelectric material having a lower surface bonded to an upper surface of a layer of a dielectric material. The dielectric material has a lower surface bonded to an upper surface of a carrier substrate. The plurality of IDT electrodes include an upper layer and a lower layer. The upper layer is formed of a material having a higher conductivity than the lower layer. The lower layer is formed of a material having a higher density than the upper layer to provide for reduction in size of the SAW resonator.

Growing community of inventors

Moriguchi, Japan

Gong Bin Tang