IMAGING DEVICES HAVING PIEZOELECTRIC TRANSCEIVERS

    公开(公告)号:US20220205836A1

    公开(公告)日:2022-06-30

    申请号:US17697837

    申请日:2022-03-17

    申请人: Exo Imaging, Inc.

    摘要: A micromachined ultrasonic transducer (MUT). The MUT includes: a substrate; a membrane suspending from the substrate; a bottom electrode disposed on the membrane; a piezoelectric layer disposed on the bottom electrode and an asymmetric top electrode is disposed on the piezoelectric layer. The areal density distribution of the asymmetric electrode along an axis has a plurality of local maxima, wherein locations of the plurality of local maxima coincide with locations where a plurality of anti-nodal points at a vibrational resonance frequency is located.

    Printed circuit board and driving method thereof

    公开(公告)号:US09661742B2

    公开(公告)日:2017-05-23

    申请号:US15016400

    申请日:2016-02-05

    发明人: Po-Hsiang Fan

    IPC分类号: H05K1/02 H01B5/02 H01G5/00

    摘要: A printed circuit board is disclosed, comprising a plate body, a conductive pattern disposed on the plate body, a conductive metal plate, and a metal layer. The conductive metal plate has a first terminal and a second terminal, wherein the first terminal and the second terminal are fixed to the plate body. An accommodating space is between the conductive metal plate and the plate body. The metal layer covers the conductive metal plate and the conductive pattern, and is filled into the accommodating space. Therefore, a printed circuit board which has metal blocks with enough thickness is provided. The metal blocks can provide sufficiently low resistance to increase resistance efficiency of the printed circuit.

    Method of fabricating graphene nano-mesh
    10.
    发明授权
    Method of fabricating graphene nano-mesh 有权
    制造石墨烯纳米网的方法

    公开(公告)号:US09595401B1

    公开(公告)日:2017-03-14

    申请号:US15066780

    申请日:2016-03-10

    摘要: Example embodiments relate to a method of fabricating a graphene nano-mesh by selectively growing an oxide layer on a defect site of a graphene layer and etching the oxide layer to form the graphene nano-mesh. The method includes forming a graphene layer on a catalyst layer, forming an oxide layer on a defect site of the graphene layer, forming the graphene nano-mesh including a plurality of openings by etching the oxide layer, and transferring, after removing the catalyst layer, the graphene nano-mesh onto a substrate.

    摘要翻译: 示例性实施例涉及通过选择性地生长石墨烯层的缺陷部位上的氧化物层并蚀刻氧化物层以形成石墨烯纳米网来制造石墨烯纳米网的方法。 该方法包括在催化剂层上形成石墨烯层,在石墨烯层的缺陷部位形成氧化层,通过蚀刻氧化层形成包括多个开口的石墨烯纳米网,并且在除去催化剂层之后转移 ,石墨烯纳米网到基底上。