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US 9,806,115 B2Granted
Image sensor with inner light-condensing scheme
AssigneesSK hynix Inc., Postech Academy-Industry Foundation
InventorsHae Wook Han, Young Woong Do
Life of this patent
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Abstract
An image sensor may include: a photoelectric conversion layer suitable for converting light into an electrical signal; a spacer layer formed over the photoelectric conversion layer, and suitable for preventing light reflection while adjusting a focus; and a first condensing layer formed at the inner bottom of the spacer layer, and suitable for condensing incident light.
Claims14
An image sensor comprising:
- a photoelectric conversion layer suitable for converting light into an electrical signal;
- a spacer layer formed over the photoelectric conversion layer and directly contacting the photoelectric conversion layer, and suitable for preventing light reflection while adjusting a focus of light;
- a color filter layer formed over the spacer layer and directly contacting the spacer layer, and suitable for transmitting a specific wavelength of light;
- and
- a first condensing layer formed at the inner bottom of the spacer layer and directly contacting the photoelectric conversion layer, and suitable for condensing incident light;
- wherein the spacer layer has a smaller refractive index than the first condensing layer, and
- wherein the first condensing layer has a smaller refractive index than the photoelectric conversion layer.
4 more elements
An image sensor comprising a pixel array in which a plurality of pixels are arranged,
- wherein each of the pixels comprises:
- a microlens suitable for primarily condensing incident light;
- a color filter formed under the microlens and suitable for transmitting a specific wavelength of light;
- a spacer faulted under the color filter and directly contacting the color filter, and suitable for preventing light reflection while adjusting a focus of light;
- a photo diode formed under the spacer, and suitable for absorbing light penetrating the digital microlens and converting the absorbed light into an electrical signal;
- and
- a digital microlens formed at the inner bottom of the spacer directly contacting the spacer and directly contacting the photo diode, and suitable for additionally condensing light penetrating the spacer,
- wherein the spacer has a larger refractive index than the color filter and a smaller refractive index than the digital microlens, and
- wherein the digital microlens has a smaller refractive index than the photo diode.
6 more elements
Dependencies are inferred from the claim text.