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Image sensor

A technology of image sensor and pixel area, which is applied in the field of image sensor and can solve problems such as difficulties

Pending Publication Date: 2021-05-11
GENOPTICS PRECISION BIOTECHNOLOGIES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when applied to bioluminescent detection, it is necessary to detect the wavelength intensities of the analyte with two (including more than two) overlapping wavelengths separately. In the current practice, two different wavelengths can be set in the image sensor. Wavelength-sensitive photodiodes, however, when this method faces different DUTs, the process parameters and design of the photodiodes must be changed.
Especially when it is necessary to detect and distinguish two or more optical signals with similar wavelengths, it is necessary to produce a photodiode that can simultaneously correspond to multiple groups of different objects under test and can distinguish multiple similar wavelengths. difficult

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Embodiment Construction

[0058] figure 1 It is a schematic cross-sectional view of an image sensor according to an embodiment of the present invention. figure 2 shown as figure 1 In the image sensor, the depth of the photodiode is plotted against the PN concentration difference. Please refer to figure 1 , the image sensor 10 of this embodiment includes a plurality of pixel regions 100 . Each pixel area 100 includes a substrate 110 , a photodiode 120 , a first pinning layer 130 , a second pinning layer 131 and a third pinning layer 132 . The substrate 110 has a first surface 110a and a second surface 110b opposite to the first surface 110a. The substrate 110 may include a base 111 and an epitaxial layer 112 , and the epitaxial layer 112 is disposed on the base 111 . The substrate 111 and the epitaxial layer 112 may have the first conductivity type. Hereinafter, the first conductivity type and the second conductivity type described are different, and may be one and the other of the P-type conduct...

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Abstract

The invention provides an image sensor. The image sensor comprises a plurality of pixel regions. Each pixel region includes a substrate, a photodiode, a first pinning layer, a second pinning layer, and a third pinning layer. The photodiode is located in the substrate of the pixel region. The first pinning layer is located in the substrate between the first surface of the substrate and the photodiode. The second pinning layer is located in the substrate between the first pinning layer and the photodiode and is electrically connected to the first bias voltage. The third pinning layer is located in the substrate between the photodiode and the second surface of the substrate and is electrically connected to a second bias voltage. The second pinning layer and the third pinning layer are respectively arranged on two opposite sides of the photodiode. The sensing position of the photodiode in the substrate is adjusted by applying the first bias voltage and / or the second bias voltage, so that the photodiode can detect and distinguish optical signals with different wavelengths.

Description

technical field [0001] The invention relates to an image sensor, in particular to an image sensor capable of detecting and distinguishing light signals of different wavelengths. Background technique [0002] Currently, an image sensor (image sensor) including a photodiode can convert the sensed light signal into an electrical signal output, and then convert it into readable digital data and a digital image through an image signal processor. However, when applied to bioluminescent detection, it is necessary to detect the wavelength intensities of the analyte with two (including more than two) overlapping wavelengths separately. In the current practice, two different wavelengths can be set in the image sensor. For the wavelength-sensitive photodiode, however, when this method is faced with different DUTs, the process parameters and design of the photodiode must be changed. Especially when it is necessary to detect and distinguish two or more optical signals with similar wavel...

Claims

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Application Information

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IPC IPC(8): H01L27/146
CPCH01L27/14605H01L27/14643
Inventor 游腾健
Owner GENOPTICS PRECISION BIOTECHNOLOGIES INC