Method to fabricate self-aligned source and drain in split gate flash
First Claim
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1. A new structure for source/drain bit lines in arrays of MOSFET devices comprising:
- rows of conducting regions formed in a substrate under openings and below oxide filled isolation regions separating columns of active areas of said arrays;
insulating materials in said openings, wherein said openings are adjacent to gate structures and on said oxide filled isolation regions and wherein each of said openings has a bottom adjoining one of said conducting regions.
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Abstract
A new structure is disclosed for source/drain bit lines in arrays of MOSFET devices. Rows of conducting regions are formed by ion implantation through openings adjacent to gate structures and in isolation regions separating columns of active areas of the arrays. The openings are filled with insulating material.
7 Citations
10 Claims
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1. A new structure for source/drain bit lines in arrays of MOSFET devices comprising:
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rows of conducting regions formed in a substrate under openings and below oxide filled isolation regions separating columns of active areas of said arrays; insulating materials in said openings, wherein said openings are adjacent to gate structures and on said oxide filled isolation regions and wherein each of said openings has a bottom adjoining one of said conducting regions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification