Image sensor having multiple layers of dielectrics adjacent the photosensitive area for improved quantum efficiency
AssigneeEastman Kodak Company
InventorsChristopher Parks, James P. Lavine
Life of this patent
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Abstract
An image sensor for capturing an image includes a photosensitive area for receiving incident light; a substance placed covering a portion of the photosensitive area which substance includes a first index of refraction; and a plurality of electrodes positioned adjacent the substance having a dielectric placed between a portion of the electrodes, which dielectric includes a second index of refraction lower than the first index of refraction.
Claims12
An image sensor for capturing an image comprising:
- (a) a photosensitive area for receiving incident light;
- (b) a second dielectric covering a portion of the photosensitive area which substance includes a second index of refraction;
- (c) at least one first dielectric positioned adjacent the substance having a first index of refraction lower than the second index of refraction for assisting in directing a substantial portion of the incident light to the photosensitive area;
- and
- (d) a layer of a third dielectric with a lower index of refraction than the second dielectric positioned between the first and second dielectrics.
A method for manufacturing an image sensor, the method comprising the steps of:
- (a) providing a photosensitive area for receiving incident light;
- (b) covering a portion of the photosensitive area with a second dielectric, which includes a second index of refraction;
- (c) providing a first dielectric positioned adjacent the second dielectric having a first index of refraction lower than the second index of refraction for assisting in directing a substantial portion of the incident light to the photosensitive area;
- and
- (d) providing a layer of a third dielectric with a lower index of refraction than the second dielectric positioned between the first and second dielectric.
A digital camera for capturing an image, comprising:
- (a) an image sensor;
- (b) a photosensitive area for receiving incident light;
- (c) a second dielectric covering a portion of the photosensitive area which substance includes a second index of refraction;
- (d) a first dielectric positioned adjacent the substance having a first index of refraction lower than the second index of refraction for assisting in directing a substantial portion of the incident light to the photosensitive area;
- (e) a layer of a third dielectric with a lower index of refraction than the second dielectric positioned between the first and second dielectric.
Dependencies are inferred from the claim text.