Image sensing device and method for fabricating the same
First Claim
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1. An image sensing device, comprising:
- a substrate, comprising a pixel array having a plurality of pixels;
a light guide structure, disposed over the substrate, forming a plurality of light pipes and a plurality of reflecting portions defining the light pipes, wherein the light pipes are aligned with the pixels of the pixel array;
a microlens array, disposed between the substrate and the light guide structure;
the microlens array including a plurality of microlenses; and
a color filter array, disposed between the substrate and the microlens array,wherein the substrate, the light guide structure, the microlens array and the color filter array are formed on a single die, andwherein each light reflecting portion extends to and contacts an outer edge of at least one of the plurality of microlenses.
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Abstract
An image sensing device is provided. The image sensing device includes a substrate having a pixel array with a plurality of pixels. A light guide structure is disposed over the substrate, forming a plurality of light pipes and a plurality of reflecting portions surrounding the light pipes. The light pipes are aligned with the pixels of the pixel array. The invention also provides a method for fabricating the image sensing device.
8 Citations
19 Claims
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1. An image sensing device, comprising:
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a substrate, comprising a pixel array having a plurality of pixels; a light guide structure, disposed over the substrate, forming a plurality of light pipes and a plurality of reflecting portions defining the light pipes, wherein the light pipes are aligned with the pixels of the pixel array; a microlens array, disposed between the substrate and the light guide structure;
the microlens array including a plurality of microlenses; anda color filter array, disposed between the substrate and the microlens array, wherein the substrate, the light guide structure, the microlens array and the color filter array are formed on a single die, and wherein each light reflecting portion extends to and contacts an outer edge of at least one of the plurality of microlenses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for fabricating an image sensing device, comprising:
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providing a substrate, wherein the substrate comprises a pixel array having a plurality of pixels; forming a photosensitive layer over the substrate; forming a microlens array between the substrate and the photosensitive layer, the microlens array including a plurality of microlenses; forming a color filter array between the substrate and the microlens array; and performing an exposure process on the photosensitive layer to form a plurality of light pipes and a plurality of reflecting portions defining the plurality of light pipes, wherein the light pipes are aligned with the pixels of the pixel array, each light reflecting portion extending to and contacting an outer edge of at least one of the plurality of microlenses, wherein the substrate, the microlens array, the color filter array, the plurality of light pipes and the plurality of reflecting portions are formed on a single die. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. An image sensing device, comprising:
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a substrate, comprising a pixel array having a plurality of pixels; a light guide structure, disposed over the substrate, forming a plurality of light pipes and a plurality of reflecting portions defining the light pipes, wherein the light pipes are aligned with the pixels of the pixel array; a microlens array, disposed between the substrate and the light guide structure, the microlens array including a plurality of microlenses; and a color filter array, disposed between the substrate and the microlens array, wherein each microlens is aligned with a corresponding one of the light pipes, and wherein each light reflecting portion extends to and contacts an outer edge of at least one of the plurality of microlenses.
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Specification