THREE-DIMENSIONAL TWO-PORT BIT CELL
First Claim
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1. A semiconductor memory, comprising:
- a read port array disposed on a first layer of a three-dimensional integrated circuit; and
a bit cell array disposed on a second layer of the three-dimensional integrated circuit,wherein the second layer being vertically positioned above or below the first layer, andwherein at least one bit cell of the bit cell array is coupled to at least one read port cell of the read port array by a via extending from the first layer to the second layer.
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Abstract
A semiconductor memory includes a read port array disposed on a first layer of a three-dimensional integrated circuit and a bit cell array disposed on a second layer of the three-dimensional integrated circuit. The second layer being vertically positioned above or below the first layer. At least one bit cell of the bit cell array is coupled to at least one read port cell of the read port array by a via extending from the first layer to the second layer.
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Citations
20 Claims
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1. A semiconductor memory, comprising:
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a read port array disposed on a first layer of a three-dimensional integrated circuit; and a bit cell array disposed on a second layer of the three-dimensional integrated circuit, wherein the second layer being vertically positioned above or below the first layer, and wherein at least one bit cell of the bit cell array is coupled to at least one read port cell of the read port array by a via extending from the first layer to the second layer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A semiconductor memory, comprising:
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a first layer of a three-dimensional integrated circuit including read input/output circuitry, a read decoder, and a read port array including a plurality of read port cells arranged in rows and columns, each row of read port cells coupled to the read decoder by at least one read word line, and each column of read port cells coupled to the read input/output circuitry by a global bit line; and a second layer of the three-dimensional integrated circuit disposed vertically above or below the first layer, the second layer including write input/output circuitry, a write decoder, and a bit cell array including a plurality of read port cells arranged in rows and columns, each row of bit cells coupled to the write decoder by a write word line, and each column of bit cells coupled to the write input/output circuitry by a pair of complementary bit lines, wherein each bit cell is coupled to a respective read port cell by a via extending from the first layer to the second layer. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method, comprising:
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forming circuitry on a first layer, the circuitry on the first layer including a read port array comprising a plurality of read port cells; forming circuitry on a second layer, the circuitry on the second layer including a bit cell array comprising a plurality of bit cells; and coupling a read port cell on the first layer to a respective bit cell on the second layer. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification