Integrated circuit including standard cells, and method of designing the integrated circuit
An integrated circuit including a first standard cell placed continuously on a row having a first height and a row having a second height different from the first height. The integrated circuit also includes a second standard cell continuously placed on a row having the first height and a row having the second height, a plurality of first power lines formed on boundaries of the plurality of rows and configured to supply a first supply voltage to the standard cells, and a plurality of second power lines formed on boundaries of the plurality of rows and configured to supply a second supply voltage to the standard cells. A placement sequence of the power lines supplying a voltage to the first standard cell being different from a placement sequence of the power lines supplying a voltage to the second standard cell.
1 . An integrated circuit comprising standard cells placed on a plurality of rows extending in a first horizontal direction, the integrated circuit comprising:
a first standard cell continuously placed on a row having a first height in a second horizontal direction perpendicular to the first horizontal direction and a row having a second height in the second horizontal direction, the second height being different from the first height, the first standard cell including first conductive patterns;
a second standard cell continuously placed on a row having the first height in the second horizontal direction and a row having the second height in the second horizontal direction, the second standard cell including second conductive patterns;
a plurality of first power lines formed on boundaries of a first subset of the plurality of rows and configured to supply a first supply voltage to the standard cells; and
a plurality of second power lines formed on boundaries of a second subset of the plurality of rows and configured to supply a second supply voltage to the standard cells,
wherein the first conductive patterns included in the first standard cell is different from the second conductive patterns included in the second standard cell,
wherein the first conductive patterns and the second conductive patterns are formed in the same metal layer,
wherein the first standard cell and the second standard cell perform an identical function and have an identical height in the second horizontal direction, and
wherein, of the plurality of first power lines and the plurality of second power lines, a placement sequence in the second horizontal direction of a first set of power lines including at least one first power line and at least one second power line supplying a voltage to the first standard cell is different from a placement sequence in the second horizontal direction of a second set of power lines including at least one first power line and at least one second power line supplying a voltage to the second standard cell.
2 . The integrated circuit of claim 1 , further comprising a third standard cell having one of the first height and the second height and configured to perform an identical function to the first standard cell and the second standard cell.
3 . The integrated circuit of claim 1 , wherein the plurality of rows comprise rows of the first height and rows of the second height alternately placed at a ratio of 1:1.
4 . The integrated circuit of claim 1 , wherein the plurality of rows comprise M first rows having the first height and placed adjacent to each other, where Mis a natural number greater than 0, and N second rows having the second height and placed adjacent to each other, where N is a natural number greater than 0.
5 . The integrated circuit of claim 4 , further comprising a fourth standard cell continuously placed on two or more rows of the first rows, and configured to perform an identical function to the first standard cell and the second standard cell.
6 . The integrated circuit of claim 1 , wherein the plurality of rows comprise M first rows having the first height, and N second rows having the second height, where M and N are natural numbers greater than 0, and the first rows and the second rows are alternately placed.
7 . The integrated circuit of claim 1 , wherein the plurality of rows comprise rows having a third height in the second horizontal direction, the third height being different from the first height and the second height.
8 . The integrated circuit of claim 1 , wherein the plurality of first power lines and the plurality of second power lines are alternately placed at a ratio of 1:1.
9 . An integrated circuit comprising standard cells placed on a plurality of rows extending in a first horizontal direction, the integrated circuit comprising:
a first standard cell placed on a row having a first height in a second horizontal direction perpendicular to the first horizontal direction;
a second standard cell continuously placed on two or more rows, each of the two or more rows having the first height;
a third standard cell continuously placed on a row having the first height in the second horizontal direction and a row having a second height in the second horizontal direction, the second height being different from the first height;
a fourth standard cell placed on a row having the first height;
a plurality of first power lines formed on boundaries of a first subset of the plurality of rows and configured to supply a first supply voltage to the standard cells; and
a plurality of second power lines formed on boundaries of a second subset of the plurality of rows and configured to supply a second supply voltage to the standard cells,
wherein the first standard cell, the second standard cell, the third standard cell, and the fourth standard cell perform an identical function,
wherein the first standard cell includes first conductive patterns, the second standard cell includes second conductive patterns, the third standard cell includes third conductive patterns, and the fourth standard cell includes fourth conductive patterns,
wherein the first conductive patterns, the second conductive patterns, the third conductive patterns, and the fourth conductive patterns are formed in the same metal layer,
wherein the first conductive patterns included in the first standard cell are arranged differently from the fourth conductive patterns included in the fourth standard cell, and
wherein, of the plurality of first power lines and the plurality of second power lines, a placement sequence in the second horizontal direction of a first set of power lines including at least one first power line and at least one second power line supplying a voltage to the first standard cell is different from a placement sequence in the second horizontal direction of a second set of power lines including at least one first power line and at least one second power line supplying a voltage to the fourth standard cell.
10 . The integrated circuit of claim 9 , further comprising:
wherein each of the plurality of first power lines and each of the plurality of second power lines are alternately placed on the boundaries of the plurality of rows.
11 . The integrated circuit of claim 10 ,
wherein the first standard cell and the fourth standard cell have an identical height.
12 . The integrated circuit of claim 10 , further comprising a fifth standard cell having a height in the second horizontal direction identical to a height of the second standard cell and configured to perform an identical function to the second standard cell,
wherein, of the plurality of first power lines and the plurality of second power lines, a placement sequence in the second horizontal direction of a first set of power lines including at least one first power line and at least one second power line supplying a voltage to the fifth standard cell is different from a placement sequence in the second horizontal direction of a second set of power lines including at least one first power line and at least one second power line supplying a voltage to the second standard cell.
13 . The integrated circuit of claim 10 , further comprising a fifth standard cell having an identical height to the third standard cell and configured to perform an identical function to the third standard cell,
wherein, of the plurality of first power lines and the plurality of second power lines, a placement sequence in the second horizontal direction of a first set of power lines including at least one first power line and at least one second power line supplying a voltage to the fifth standard cell is different from a placement sequence in the second horizontal direction of a second set of power lines including at least one first power line and at least one second power line supplying a voltage to the third cell.
14 . The integrated circuit of claim 9 , wherein the plurality of rows comprise M first rows having the first height and placed adjacent to each other, where Mis a natural number greater than 0, and N second rows having the second height and placed adjacent to each other, where N is a natural number greater than 0.
15 . The integrated circuit of claim 9 , wherein the plurality of rows comprise rows having a third height that is different from the first height and the second height, and comprise rows having a fourth height that is different from the first through third heights.
16 . An integrated circuit comprising standard cells placed on a plurality of rows extending in a first horizontal direction, the integrated circuit comprising:
a first standard cell placed on two or more rows, each of the two or more rows having a first height in a second horizontal direction perpendicular to the first horizontal direction;
a second standard cell placed on two or more rows each of which having the first height in the second horizontal direction;
a plurality of first power lines formed on boundaries of a first subset of the plurality of rows and configured to supply a first supply voltage to the standard cells; and
a plurality of second power lines formed on boundaries of a second subset of the plurality of rows and configured to supply a second supply voltage to the standard cells,
wherein the first standard cell and the second standard cell perform an identical function and have an identical height,
wherein, of the plurality of first power lines and the plurality of second power lines, a placement sequence in the second horizontal direction of a first set of power lines including at least one first power line and at least one second power line supplying a voltage to the first standard cell is different from a placement sequence in the second horizontal direction of a second set of power lines including at least one first power line and at least one second power line supplying a voltage to the second standard cell,
wherein the first standard cell includes first conductive patterns and the second standard cell includes second conductive patterns,
wherein the first conductive patterns and the second conductive patterns are formed in the same metal layer, and
wherein the first conductive patterns included in the first standard cell are arranged differently from the second conductive patterns included in the second standard cell.
17 . The integrated circuit of claim 16 , further comprising a third standard cell having the first height and configured to perform an identical function to the first standard cell and the second standard cell.
18 . The integrated circuit of claim 16 , further comprising a third standard cell placed on a row having a second height in the second horizontal direction, the second height being different from the first height, and wherein the third standard cell has a height in the second horizontal direction identical to the second height, and the third standard cell is configured to perform an identical function to the first standard cell and the second standard cell.