Integrated circuit incorporating decoders disposed beneath memory arrays
First Claim
Patent Images
1. An integrated circuit, comprising:
- a first memory array;
a first row decoder, a portion of said first row decoder is folded beneath said first memory array, said first row decoder includes a first set of tabs;
a second memory array; and
a second row decoder, a portion of said second row decoder is folded beneath said second memory array, said second row decoder includes a second set of tabs, said first set of tabs and said second set of tabs are interdigitated.
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Abstract
A very high density field programmable memory is disclosed. An array is formed vertically above a substrate using several layers, each layer of which includes vertically fabricated memory cells. The cell in an N level array may be formed with N+1 masking steps plus masking steps needed for contacts. Maximum use of self alignment techniques minimizes photolithographic limitations. In one embodiment the peripheral circuits are formed in a silicon substrate and an N level array is fabricated above the substrate.
172 Citations
19 Claims
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1. An integrated circuit, comprising:
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a first memory array; a first row decoder, a portion of said first row decoder is folded beneath said first memory array, said first row decoder includes a first set of tabs; a second memory array; and a second row decoder, a portion of said second row decoder is folded beneath said second memory array, said second row decoder includes a second set of tabs, said first set of tabs and said second set of tabs are interdigitated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 14, 15, 16, 17, 18, 19)
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8. An integrated circuit, comprising:
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a first memory array; a first row decoder, a first portion of said first row decoder is beneath said first memory array; a second memory array; and a second row decoder, a first portion of said second row decoder is beneath said second memory array, a second portion of said first row decoder is interdigitated with a second portion of said second row decoder. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification