Semiconductor device including regions for reducing density gradient effect and method of forming the same

A method, comprising:

• receiving a circuit design;
• generating a design layout according to the circuit design by placing a first component, wherein the design layout includes a first power rail electrically coupled to the first component;
• determining a first area surrounding and in contact with the first component;
• identifying a first cell configuration of the first component;
• selecting a first cell comprising a first capacitor from a cell library, wherein the first cell has the first cell configuration;
• and
• placing a first cell array formed of the first cell in the first area,
• wherein the design layout includes a second power rail electrically coupled to the first cell array,
• wherein at least one of the receiving, generating, determining, identifying, selecting and placing steps is performed by a processor.

A method, comprising:

• receiving a circuit design;
• generating a design layout according to the circuit design by defining a first zone and a second zone adjacent to the first zone;
• placing a first component in the first zone and a second component in the second zone;
• defining a third zone of the design layout adjacent to the first zone and the second zone;
• placing a third component comprising a third cell in the third zone;
• providing a line between the first zone and the second zone;
• determining a first area and a second area between the first component and the second component;
• determining a first cell configuration of the first component and a second cell configuration of the second component;
• selecting a first cell comprising a first capacitor from a cell library, wherein the first cell has a third cell configuration identical to the first cell configuration of the first component;
• selecting a second cell comprising a second capacitor from a cell library, wherein the second cell has a fourth cell configuration identical to the second cell configuration of the second component;
• placing a first cell array formed of the first cell in the first area;
• and
• placing a second cell array formed of the second cell in the second area.