Method for manufacturing image sensor structure having wide contact
First Claim
1. A method for manufacturing an image sensor structure, comprising:
- forming an isolation structure in a substrate to divide the substrate into a first region and a second region;
forming a first light sensing region in the first region and a second light sensing region in the second region;
forming a first gate structure over the first region and a second gate structure over the second region, wherein the first gate structure and the second gate structure are positioned at a front side of the substrate;
forming a first source/drain structure adjacent to the first gate structure and a second source/drain structure adjacent to the second gate structure;
forming an interlayer dielectric layer over the front side of the substrate to cover the first gate structure and the second gate structure;
forming a contact trench through the interlayer dielectric layer, such that a portion of the first source/drain structure, a portion of the second source/drain structure, and the isolation structure are exposed by the contact trench; and
forming a contact in the contact trench.
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Abstract
Methods for forming image sensor structures are provided. The method includes forming an isolation structure in a substrate and forming a first light sensing region and a second light sensing region. The method further includes forming a first gate structure and a second gate structure, and the first gate structure and the second gate structure are positioned at a front side of the substrate. The method further includes forming a first source/drain structure adjacent to the first gate structure and a second source/drain structure adjacent to the second gate structure and forming an interlayer dielectric layer over the front side of the substrate. The method further includes forming a contact trench through the interlayer dielectric layer and forming a contact in the contact trench.
36 Citations
20 Claims
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1. A method for manufacturing an image sensor structure, comprising:
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forming an isolation structure in a substrate to divide the substrate into a first region and a second region; forming a first light sensing region in the first region and a second light sensing region in the second region; forming a first gate structure over the first region and a second gate structure over the second region, wherein the first gate structure and the second gate structure are positioned at a front side of the substrate; forming a first source/drain structure adjacent to the first gate structure and a second source/drain structure adjacent to the second gate structure; forming an interlayer dielectric layer over the front side of the substrate to cover the first gate structure and the second gate structure; forming a contact trench through the interlayer dielectric layer, such that a portion of the first source/drain structure, a portion of the second source/drain structure, and the isolation structure are exposed by the contact trench; and forming a contact in the contact trench. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for manufacturing an image sensor structure, comprising:
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forming an isolation structure in a substrate; forming a first light sensing region and a second light sensing region at opposite sides of the isolation structure; forming a first source/drain structure and a second source/drain structure at opposite sides of the isolation structure; forming an interlayer dielectric layer over the substrate to cover the first source/drain structure and the second source/drain structure; forming a contact trench through the interlayer dielectric layer, such that a portion of the first source/drain structure, a portion of the second source/drain structure, and the isolation structure are exposed by the contact trench; and forming a contact in the contact trench. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for manufacturing an image sensor structure, comprising:
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forming an isolation trench in a substrate; forming an isolation structure in the isolation trench; forming a first light sensing region and a second light sensing region at opposite sides of the isolation structure; forming a first source/drain structure and a second source/drain structure at opposite sides of the isolation structure; and forming a contact over a portion of the first source/drain structure, a portion of the second source/drain structure, and the isolation structure. - View Dependent Claims (17, 18, 19, 20)
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Specification