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Lamb wave resonator

A Lamb wave resonator, one-to-one correspondence technology, applied in the direction of impedance network, electrical components, etc., can solve the problems of multi-band mobile phones, difficult miniaturization and high integration

Pending Publication Date: 2022-07-26
武汉敏声新技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a Lamb wave resonator, which can solve the technical problem that the multi-band mobile phone is difficult to miniaturize and highly integrate

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Embodiment Construction

[0035] In order to make the purposes, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0036] It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element cou...

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Abstract

The invention discloses a Lamb wave resonator, and relates to the technical field of semiconductors, the Lamb wave resonator comprises a piezoelectric layer and first interdigital electrodes arranged on the upper surface of the piezoelectric layer, the first interdigital electrodes comprise first positive interdigital electrodes and first negative interdigital electrodes, and the first positive interdigital electrodes and the first negative interdigital electrodes are alternately distributed at intervals; a protruding structure connected with the piezoelectric layer is arranged between the first positive interdigital electrode and the first negative interdigital electrode which are adjacent, and the protruding structure is used for changing the thickness of the piezoelectric layer. According to the Lamb wave resonator provided by the invention, the projection structure connected with the piezoelectric layer is arranged between the first positive interdigital electrode and the first negative interdigital electrode which are adjacent, so that the piezoelectric layer has different thicknesses, and one thickness corresponds to one harmonic peak, so that double-harmonic-peak or multi-harmonic-peak response is realized; the technical problem that high integration of multiple frequency bands of wireless communication is difficult is solved.

Description

technical field [0001] The present invention relates to the technical field of semiconductors, and in particular, to a Lamb wave resonator. Background technique [0002] With the development of wireless communication and the rapid commercialization of the fifth generation mobile communication technology (5G), the requirements for wide frequency band and high integration are getting higher and higher. Filters based on piezoelectric resonators play an important role in RF front-end modules, and their miniaturization and integration are today's development trends. [0003] However, the existing RF filters exhibit a single-band response because the resonator only has a single resonance peak (single resonance mode). To meet the requirements of multiple frequency bands, multiple filters must be embedded in the same mobile phone space, which greatly increases the The size and complexity of the device. SUMMARY OF THE INVENTION [0004] The purpose of the present invention is to ...

Claims

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Application Information

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IPC IPC(8): H03H9/02
CPCH03H9/02228Y02D30/70
Inventor 温志伟刘文娟刘婕妤罗天成蔡耀孙成亮孙博文
Owner 武汉敏声新技术有限公司
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