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Optical sensor and manufacturing method thereof

  • US 10,566,476 B2
  • Filed: 09/22/2017
  • Issued: 02/18/2020
  • Est. Priority Date: 08/12/2014
  • Status: Active Grant
First Claim
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1. An optical sensor, comprising:

  • a semiconductive substrate;

    a light sensing region on the semiconductive substrate;

    a waveguide region comprising;

    a first dielectric layer comprising a first refractive index;

    a second dielectric layer comprising a second refractive index; and

    a third dielectric layer comprising a third refractive index,wherein the first dielectric layer is disposed between the second dielectric layer and the third dielectric layer, and the third dielectric layer is disposed on the first dielectric layer,wherein the waveguide region is divided into a wave inset portion for receiving a light and a waveguide region adjacent to the wave insert portion and comprising at least one sample holding portion in the third dielectric layer, and light incident from the wave insert portion is guided to the sample holding portion through the first dielectric layer,wherein the second refractive index and the third refractive index are smaller than the first refractive index; and

    wherein an interconnect region, comprising at least one circuitry configured to process and/or output data information generated by the light sensing region, is below the waveguide region, and the interconnect region is disposed above the light sensing region.

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