SEMICONDUCTOR MEASUREMENT APPARATUS

    公开(公告)号:US20250012556A1

    公开(公告)日:2025-01-09

    申请号:US18403801

    申请日:2024-01-04

    Abstract: A semiconductor measurement apparatus includes lighting unit; a light receiving unit; and a control unit configured to: generate a prediction equation representing the original image, where the prediction equation is based on a plurality of elements of a Mueller matrix, approximate each of the plurality of elements of the Mueller matrix to a polynomial including bases of a Zernike polynomial and coefficients, generate optimization coefficients based on a sum of the coefficients and a difference between the prediction equation and the original image, determine whether an optimization condition is satisfied based on the optimization coefficients and a minimum value, and select a dimension based on the optimization coefficients and the bases when the optimization condition is satisfied.

    Wearable device and method for controlling audio output using multi digital to analog converter path

    公开(公告)号:US12126975B2

    公开(公告)日:2024-10-22

    申请号:US17842044

    申请日:2022-06-16

    CPC classification number: H04R3/12 G10K11/17823 H04S3/008 H04R2205/022

    Abstract: A wearable device is provided and includes a plurality of speakers including a first speaker, a second speaker, and an Nth speaker, a plurality of digital to analog converter (DAC)s including a first DAC connected to the first speaker, a second DAC connected to the second speaker, and an Nth DAC connected to the Nth speaker, an audio signal processing module including N DAC output paths configured to filter an audio signal according to each frequency band and output the audio signal, a memory; and a processor electrically connected to the plurality of DACs, the audio signal processing module, and the memory, wherein the memory includes instructions causing the processor to, when the audio signal is reproduced, analyze a frequency component included in the audio signal, activate the N DAC output paths when the frequency component included in the audio signal has a full band range, activate only a DAC output path for processing a specific frequency band among the N DAC output paths when the frequency component included in the audio signal has only the specific frequency band, and output the audio signal through a speaker connected to the activated DAC output path.

    SEMICONDUCTOR MEASUREMENT APPARATUS
    18.
    发明公开

    公开(公告)号:US20240288265A1

    公开(公告)日:2024-08-29

    申请号:US18372391

    申请日:2023-09-25

    CPC classification number: G01B11/02 G01B2210/56

    Abstract: Provided is a semiconductor measurement apparatus that includes: a lighting unit comprising a light source, and a light modulator configured to decompose a light output by the light source into a plurality of wavelength bands and generate an output light of at least two selected wavelength bands; a first optical unit comprising an illumination polarizing element disposed in a path of the output light; a second optical unit comprising a beam splitter, an objective lens configured to allow light having passed through the first optical unit to be incident onto a sample, and a self-interference generator disposed on a path of a reflected light; a sensor configured to output an original image representing an interference pattern of light having passed through the self-interference generator; and a controller configured to process the original image and determine a selected critical dimension of a structure included in the sample.

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