Bulk acoustic wave filter
First Claim
1. A filter arrangement with a carrier substrate (1), a resonator unit, and a reflection element (2) between the carrier substrate and the resonator unit, characterized in that the reflection element (2) consists of a unitary layer formed of an acoustically reflecting substance selected from the group consisting of silica aerogel or organic aerogel, xerogel, glass foam, foam-type adhesive, foamed synthetic resin and a low density synthetic resin.
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Accused Products
Abstract
The invention describes a filter arrangement as well as an electronic component, each with a bulk acoustic wave resonator unit which is present on a carrier substrate (1). A reflection element (2) is provided between the carrier substrate (1) and the bulk acoustic wave resonator unit for the purpose of acoustic insulation of the generated oscillations. This reflection element (2) may consist either of several layers of alternately high and low impedance or, if the acoustically reflecting substance has a sufficiently low impedance, of a single layer. In addition, a mobile telephone device, a transmitter, a receiver, and a wireless data transmission system as well as a method of manufacturing an electronic component are described.
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Citations
12 Claims
- 1. A filter arrangement with a carrier substrate (1), a resonator unit, and a reflection element (2) between the carrier substrate and the resonator unit, characterized in that the reflection element (2) consists of a unitary layer formed of an acoustically reflecting substance selected from the group consisting of silica aerogel or organic aerogel, xerogel, glass foam, foam-type adhesive, foamed synthetic resin and a low density synthetic resin.
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2. A mobile telephone device provided with a filtier arrangement having a carrier substrate (1), a resonator unit, and a reflection element (2) between the carrier substrate (1) and the resonator unit, characterized in that the reflection element (2) consists of a unitary layer formed of an acoustically reflecting substance selected from the group consisting of silica aerogel or organic aerogel, xerogel, glass foam, foam-type adhesive, foamed synthetic resin and a low density synthetic resin.
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3. A transmitter provided with a filter arrangement having a carrier substrate (1), a resonator unit, and a reflection element (2) between the carrier substrate (1) and the resonator unit, characterized in that the reflection element (2) consists of a uinitary layer formed of an acoustically reflecting substance selected from the group consisting of silica aerogel or organic aerbgel, xerogel, glass foam, foam-type adhesive, foamed synthetic resin and a low density synthetic resin.
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4. A receiver provided with a filter arrangement having a carrier substrate (1), a resonator unit, and a reflection element (2) between the carrier substrate (1) and the resonator unit, characterized in that the reflection element (2) consists of a unitary layer formed of an acoustically reflecting substance selected from the group consisting of silica aerogel or organic aerogel, xerogel, glass foam, foam-type adhesive, foamed synthetic resin and a low density synthetic resin.
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5. A wireless data transmission system provided with a filter arrangement having a carrier substrate (1), a resonator unit, and a reflection element (2) between the carrier substrate (1) and the resonator unit, characterized in that the reflection element (2) consists of a unitary layer formed of an acoustically reflecting substance selected from the group consisting of silica aerogel or organic aerogel, xerogel, glass foam, foam-type adhesive, foamed synthetic resin and a low density synthetic resin.
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6. An electronic component with a carrier substrate (1), a resonator unit, and a reflection element (2) between the carrier substrate (1) and the resonator unit, characterized in that the reflection element (2) consists of a unitary layer formed of an acoustically reflecting substance selected from the group consisting of silica aerogel or organic aerogel, xerogel, glass foam, foam-type adhesive, foamed synthetic resin and a low density synthetic resin.
Specification