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Acoustic tweezers

US11731127B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-11731127-B2
Application numberUS-201616085424-A
CountryUS
Kind codeB2
Filing dateMar 15, 2016
Priority dateMar 15, 2016
Publication dateAug 22, 2023
Grant dateAug 22, 2023

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  1. Title

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  2. Abstract

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  3. Assignees and inventors

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  4. Key dates

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  5. First independent claim

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  6. CPC / IPC classifications

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  7. Citations and related patents

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Abstract

Official abstract text for this publication.

Electroacoustic device having a transducer including a piezoelectric substrate, first and second electrodes of inverse polarity having respective first and second tracks provided on said substrate, the first and second tracks spiraling around a same center (C), the transducer being configured for generating a swirling ultrasonic surface wave in the substrate.

First claim

Opening claim text (preview).

The invention claimed is: 1. An electroacoustic device comprising a transducer comprising a piezoelectric substrate, first and second electrodes of inverse polarity comprising respective first and second tracks provided on said substrate, the first and second tracks spiraling around a same center, the transducer being configured for generating a swirling ultrasonic surface wave in the substrate, wherein each of the first and second tracks spirals along a line defined by the equation R ⁡ ( Θ ) = φ 0 - ω ⁢ ⁢ μ 0 ⁡ ( Θ ) + α ⁡ ( ψ _ ⁡ ( Θ ) ) - π 4 ⁢ sgn ⁡ ( h ″ ⁡ ( ψ _ ⁡ ( Θ ) , Θ ) ) - l ⁢ ⁢ Θ ω ⁢ ⁢ s r ⁡ ( ψ _ ⁡ ( Θ ) ) ⁢ cos ⁡ ( ψ _ ⁡ ( Θ ) - Θ ) wherein: R(θ) is the polar coordinate of the line with respect with the azimuthal angle θ, φ 0 is a free parameter, l is the vortex order of a swirling SAW of pulsation ω, l being an integer such that |l|≥1. μ 0 (θ) is given by: μ 0 ⁡ ( Θ ) = ∑ i = 1 n ⁢ s z ( i ) ⁡ ( Θ ) ⁢ ( z i - z i - 1 ) where z i −z i-1 is the distance between two successive interfaces separating materials stacked onto the substrate, z 0 being the height of the interface between the substrate and the layer contacting the substrate, μ 0 (θ)=0 in case of the absence of stacked layers h ″ ⁡ ( ψ _ ) ⁢ ⁢ is ⁢ ⁢ ∂ 2 ∂ ψ 2 ⁡ [

Assignees

Inventors

Classifications

  • B01L3/502715Primary

    characterised by interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces · CPC title

  • B01L3/50273

    characterised by the means or forces applied to move the fluids · CPC title

  • B01L3/502761

    specially adapted for handling suspended solids or molecules independently from the bulk fluid flow, e.g. for trapping or sorting beads or physically stretching molecules · CPC title

  • G01N15/1404

    Handling flow, e.g. hydrodynamic focusing · CPC title

  • G02B21/32

    Micromanipulators structurally combined with microscopes · CPC title

Patent family

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View patent family 55538222

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Frequently asked questions

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What does patent US11731127B2 cover?
Electroacoustic device having a transducer including a piezoelectric substrate, first and second electrodes of inverse polarity having respective first and second tracks provided on said substrate, the first and second tracks spiraling around a same center (C), the transducer being configured for generating a swirling ultrasonic surface wave in the substrate.
Who is the assignee on this patent?
Centre Nat Rech Scient, Univ Lille, Lille Ecole Centrale, and 1 more
What technology area does this patent fall under?
Primary CPC classification B01L3/502715. Mapped technology areas include Operations & Transport.
When was this patent published?
Publication date Tue Aug 22 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).