METHOD FOR MANUFACTURING BAW RESONATORS ON A SEMICONDUCTOR WAFER
    4.
    发明申请
    METHOD FOR MANUFACTURING BAW RESONATORS ON A SEMICONDUCTOR WAFER 有权
    在半导体波形上制造BAW谐振器的方法

    公开(公告)号:US20140075726A1

    公开(公告)日:2014-03-20

    申请号:US14084394

    申请日:2013-11-19

    Abstract: A method for manufacturing a wafer on which are formed resonators, each resonator including, above a semiconductor substrate, a stack of layers including, in the following order from the substrate surface: a Bragg mirror; a compensation layer made of a material having a temperature coefficient of the acoustic velocity of a sign opposite to that of all the other stack layers; and a piezoelectric resonator, the method including the successive steps of: a) depositing the compensation layer; and b) decreasing thickness inequalities of the compensation layer due to the deposition method, so that this layer has a same thickness to within better than 2%, and preferably to within better than 1%, at the level of each resonator.

    Abstract translation: 一种制造晶片的方法,其上形成有谐振器,每个谐振器包括在半导体衬底上方的一叠层,其从衬底表面依次包括:布拉格反射镜; 由具有与所有其它堆叠层相反的符号的声速的温度系数的材料制成的补偿层; 和压电谐振器,该方法包括以下连续步骤:a)沉积补偿层; 和b)由于沉积方法而减小补偿层的厚度不等式,使得该层在每个谐振器的电平上具有相同的厚度,优于2%以内,优选在1%以内。

    IMAGE SENSOR MANUFACTURING METHOD

    公开(公告)号:US20230050334A1

    公开(公告)日:2023-02-16

    申请号:US17815522

    申请日:2022-07-27

    Abstract: In an embodiment a method for manufacturing an image sensor includes forming of a plurality of microlenses at a first resin layer, forming a mask on top of and in contact with the first resin layer, the mask comprising a second resin; and chemical plasma etching the first resin layer through the mask.

    Method of etching a cavity in a stack of layers

    公开(公告)号:US10770306B2

    公开(公告)日:2020-09-08

    申请号:US16240044

    申请日:2019-01-04

    Abstract: A cavity is etched in a stack of layers which includes a first layer made of a first material and a second layer made of a second material. To etch the cavity, a first etch mask having a first opening is formed over the stack of layer. The stack of layers is then etched through the first opening to a depth located in the second layer. A second mask having a second opening, the dimensions of which are smaller, in top view, than the first opening, is formed over the stack of layer. The second opening is located, in top view, opposite the area etched through the first opening. The second layer is then etched through the second opening to reach the first layer. The etch method used is configured to etch the second material selectively over the first material.

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