Aspects of the disclosure include an integrated circuit that includes a plurality of functional circuit cells and a plurality of inactive spare functional circuit cells. Ones of the functional circuit cells respectively includes a set of first electrically interconnected transistors that define a first logic component and a first power rail configured to carry a first supply voltage. Ones of the inactive spare functional circuit cells respectively includes a set of second electrically interconnected transistors configured to define a second logic component. The set of electrically interconnected transistors is interconnected through a second set of conductive lines formed in the first conductive layer. The set of second electrically interconnected transistors is not connected to any power rail.

Aspects of the disclosure include an integrated circuit that includes a plurality of functional circuit cells and a plurality of inactive spare functional circuit cells. Ones of the functional circuit cells respectively includes a set of first electrically interconnected transistors that define a first logic component and a first power rail configured to carry a first supply voltage. Ones of the inactive spare functional circuit cells respectively includes a set of second electrically interconnected transistors configured to define a second logic component and a second power rail configured to carry the first supply voltage. The set of electrically interconnected transistors is interconnected through a second set of conductive lines formed in the first conductive layer. The set of second electrically interconnected transistors is electrically disconnected from the second power rail.