Image sensor and method for fabricating the same
First Claim
Patent Images
1. An image sensor comprising:
- a color filter array for converting an external light into a color light;
a microlens pattern under the color filter array for converging the color light passing through the color filter array;
a photodiode array in an active region of a semiconductor substrate for receiving the light converged at the microlens pattern, adapted to produce and store photo charges;
a light transmission layer over the photodiode array for supporting the microlens pattern and the color filter array, and transmitting the light converged at the microlens patterns toward the photodiode array.
4 Assignments
0 Petitions
Accused Products
Abstract
Image sensor and method for fabricating the same are disclosed, wherein, instead of a traditional microlens array over a color filter array, a microlens pattern is arranged under the color filter array, which can permit shortening a total travel distance of a converged light to the photodiode, improve intensity and focus of the light finally reaching the photodiode array, and improve a low luminance performance of the image sensor. The minimized travel distance of the converged light, which optimizes intensity and focus of the light reaching the photodiode array, permits significantly improving an image quality reproduced by the image sensor.
47 Citations
7 Claims
-
1. An image sensor comprising:
-
a color filter array for converting an external light into a color light;
a microlens pattern under the color filter array for converging the color light passing through the color filter array;
a photodiode array in an active region of a semiconductor substrate for receiving the light converged at the microlens pattern, adapted to produce and store photo charges;
a light transmission layer over the photodiode array for supporting the microlens pattern and the color filter array, and transmitting the light converged at the microlens patterns toward the photodiode array. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method for fabricating an image sensor comprising the steps of:
-
forming a photodiode array in an active region of a semiconductor substrate defined by an active cell isolation film;
forming a light transmission layer on the photodiode array;
forming a microlens pattern on the light transmission layer, the microlens pattern being adapted to converge an external light; and
forming a color filter array over the microlens pattern. - View Dependent Claims (7)
-
Specification