Semiconductor integrated circuit
According to an aspect of the present invention, there is provided a semiconductor IC that includes a plurality of standard cells arranged in a first direction on a semiconductor substrate, and a first diffusion layer connected to a first power source and a second diffusion layer connected to a second power source in the each standard cell, wherein the first diffusion layers as well as the second diffusion layers of neighboring standard cells are integrally formed.
1. A semiconductor integrated circuit comprising:
a plurality of standard cells arranged in a first direction on a semiconductor substrate, each cell being separated from neighboring standard cells by a cell boundary between the neighboring standard cells; and
a first diffusion layer connected to a first power source and a second diffusion layer connected to a second power source in each of the plurality of standard cells,
wherein the first diffusion layer as well as the second diffusion layer of all of the plurality of standard cells are integrally formed;
wherein no isolation region is formed between neighboring standard cells at the cell boundary,
wherein a dummy MOSFET is positioned at one end of all of the arranged standard cells beyond the cell boundaries.
2. The semiconductor integrated circuit according to claim 1 , wherein each width of the first diffusion layer and the second diffusion layer is constant throughout all of the arranged standard cells.
3. The semiconductor integrated circuit according to claim 1 , wherein a plurality of gate electrodes are formed at even intervals in the first direction throughout all of the arranged standard cells.
4. The semiconductor integrated circuit according to claim 3 , wherein the plurality of gate electrodes have the same gate length.
5. The semiconductor integrated circuit according to claim 1 , wherein each of the plurality of standard cells has a first connecting portion to connect the first diffusion layer to the first power source and a second connecting portion to connect the second diffusion layer to the second power source, the first connecting portion and the second connecting portion both being shared by the neighboring standard cells at each cell boundary.
6. The semiconductor integrated circuit according to claim 1 , wherein the first diffusion layer and/or the second diffusion layer are separately arranged in a second direction crossing the first direction.
7. The semiconductor integrated circuit according to claim 1 , wherein dummy MOSFETs are positioned at both ends of all of the arranged standard cells beyond the cell boundaries.
8. The semiconductor integrated circuit according to claim 1 , wherein each of the first diffusion layer and the second diffusion layer include at least one MOSFET which functions as a circuit element in each of the plurality of standard cells.