Image sensor
First Claim
1. An image sensor comprising:
- a substrate comprising a plurality of pixels arranged in a two-dimensional array structure, and having a front side and a back side opposite to the front side;
an interconnection arranged on the front side of the substrate;
an insulating layer, a color filter, and a micro-lens arranged on the back side of the substrate;
a pixel separation structure disposed in the substrate, wherein the pixel separation structure includes a conductive layer having a grid structure in a planar view of the image sensor and surrounding each of the plurality of pixels; and
a back side contact vertically overlapped with and electrically connected to a grid point portion of the grid structure of the conductive layer of the pixel separation structure.
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Accused Products
Abstract
A substrate includes a plurality of pixels arranged in a two-dimensional array structure and has a front side and a back side opposite to the front side. An interconnection is arranged on the front side of the substrate. An insulating layer, a color filter, and a micro-lens are arranged on the back side of the substrate. A pixel separation structure is disposed in the substrate. The pixel separation structure includes a conductive layer having a grid structure in a planar view of the image sensor and surrounds each of the plurality of pixels. A back side contact is vertically overlapped with and electrically connected to a grid point portion of the grid structure of the conductive layer of the pixel separation structure.
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Citations
20 Claims
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1. An image sensor comprising:
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a substrate comprising a plurality of pixels arranged in a two-dimensional array structure, and having a front side and a back side opposite to the front side; an interconnection arranged on the front side of the substrate; an insulating layer, a color filter, and a micro-lens arranged on the back side of the substrate; a pixel separation structure disposed in the substrate, wherein the pixel separation structure includes a conductive layer having a grid structure in a planar view of the image sensor and surrounding each of the plurality of pixels; and a back side contact vertically overlapped with and electrically connected to a grid point portion of the grid structure of the conductive layer of the pixel separation structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An image sensor comprising:
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a plurality of pixels each comprising a photodiode disposed in a substrate and comprising a front side and a back side, the plurality of pixels being arranged in a first direction and a second direction to form an array structure in a planar view of the image sensor; a pixel separation structure penetrating the substrate, wherein the pixel separation structure includes a plurality of sidewall insulating layers, and a conductive layer having a grid structure surrounding each of the plurality of sidewall insulating layers; and a plurality of back side contacts each partially inserted into one of a plurality of grid point portions of the grid structure of the conductive layer, wherein the plurality of grid point portions of the grid structure of the conductive layer is non-overlapped in the first direction and in the second direction with the plurality of pixels. - View Dependent Claims (13, 14, 15, 16)
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17. An image sensor having a voltage source generating a voltage, comprising:
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a substrate; a plurality of photodiodes disposed in the substrate and arranged in a first direction and in a second direction intersecting the first direction in a planar view of the image sensor; a pixel separation structure penetrating the substrate, and surrounding each of the plurality of photodiodes and separating the plurality of photodiodes from each other; an interconnection electrically connected to the pixel separation structure and applied with the voltage having a negative voltage or a ground voltage; and a plurality of back side contacts arranged in a third direction intersecting the first direction and the second direction in the planar view of the image sensor and electrically connected to the interconnection through the pixel separation structure, wherein the plurality of back side contacts each is partially inserted in a region of the pixel separation structure, and wherein the region of the pixel separation structure is surrounded by a predetermined number of the plurality of photodiodes. - View Dependent Claims (18, 19, 20)
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Specification