WO2025000170 - A BULK ACOUSTIC WAVE RESONATOR
National phase entry is expected:
Publication Number
WO/2025/000170
Publication Date
02.01.2025
International Application No.
PCT/CN2023/102254
International Filing Date
26.06.2023
Title **
[English]
A BULK ACOUSTIC WAVE RESONATOR
[French]
RÉSONATEUR À ONDES ACOUSTIQUES DE VOLUME
Applicants **
HUAWEI TECHNOLOGIES CO., LTD.
Huawei Administration Building, Bantian, Longgang District
Shenzhen, Guangdong 518129, CN
Inventors
PLESSKI, Viktor
Huawei Technologies Duesseldorf GmbH, Riesstr. 25
80992, DE
ZHANG, Naiqing
Huawei Administration Building, Bantian, Longgang District
Shenzhen, Guangdong 518129, CN
Application details
| Total Number of Claims/PCT | * |
| Number of Independent Claims | * |
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| Number of Drawings | * |
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| Number of Pages with Drawings | * |
| Pages of Specification | * |
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International Searching Authority |
CNIPA
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| Applicant's Legal Status |
Legal Entity
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| * | |
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| Entry into National Phase under |
Chapter I
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| Translation |
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing | 1034 | |
| EPO | Filing, Examination | 6777 | |
| Japan | Filing | 531 | |
| South Korea | Filing | 482 | |
| USA | Filing, Examination | 2635 |
Total: 11459 USD
Abstract[English]
The invention allows a structure for a bulk acoustic wave resonator that enables an increase in piezoelectric coupling and in suppression of parasitic modes. The disclosed grooves be-tween interdigital transducer (IDT) electrodes decrease the generation of parasitic modes and block their propagation and resonant accumulation of their amplitudes. Furthermore, the disclosed grooves between the IDT electrodes suppress high-order modes along a horizontal direction and increase a resonance-antiresonance frequency gap of the bulk acoustic wave resonator.[French]
L'invention permet d'obtenir une structure pour un résonateur à ondes acoustiques de volume qui permet une augmentation du couplage piézoélectrique et la suppression de modes parasites. Les rainures entre des électrodes de transducteur interdigité (IDT) diminuent la génération de modes parasites et bloquent leur propagation et l'accumulation résonante de leurs amplitudes. En outre, les rainures décrites entre les électrodes IDT suppriment des modes d'ordre élevé le long d'une direction horizontale et augmentent un espace de fréquence de résonance-antirésonance du résonateur à ondes acoustiques de volume.