Abstract: A circuit block including standard cells (1) arranged therein is provided with switch cells (20) capable of switching between electrical connection and disconnection between power supply lines (3) extending in an X-direction and power supply straps (11) extending in a Y-direction. Each of the power supply straps (11) is provided with a single switch cell (20) arranged every M sets of power supply lines (3) (M is an integer of 3 or more). In the Y-direction, the switch cells (20) are arranged at different positions in the power supply straps (11) adjacent to each other, and are arranged at the same position every M power supply straps (11) in the X-direction.

Abstract: Power switch cells (20) respectively includes power switches (21), each of which is capable of performing switching between electrical connection and disconnection between a global power supply line (11) and a local power supply line (8) in accordance with a control signal (CTR). The power switches (21) are connected in a chain state to constitute a chain connection through which the control signal (CTR) is sequentially transmitted. A starting point switch (21a) in the chain connection has a greater distance to an edge (BE) of a region occupied by a power domain than an ending point switch (21b).

Abstract: Power switch cells (20) respectively includes power switches (21), each of which is capable of performing switching between electrical connection and disconnection between a global power supply line (11) and a local power supply line (8) in accordance with a control signal (CTR). The power switches (21) are connected in a chain state to constitute a chain connection through which the control signal (CTR) is sequentially transmitted. A starting point switch (21a) in the chain connection has a greater distance to an edge (BE) of a region occupied by a power domain than an ending point switch (21b).

Abstract: A circuit block including standard cells (1) arranged therein is provided with switch cells (20) capable of switching between electrical connection and disconnection between power supply lines (3) extending in an X-direction and power supply straps (11) extending in a Y-direction. Each of the power supply straps (11) is provided with a single switch cell (20) arranged every M sets of power supply lines (3) (M is an integer of 3 or more). In the Y-direction, the switch cells (20) are arranged at different positions in the power supply straps (11) adjacent to each other, and are arranged at the same position every M power supply straps (11) in the X-direction.

Abstract: A semiconductor device has: a first signal line formed in a first wiring layer formed on a semiconductor substrate, and disposed in a first direction; first and second shield lines formed in the first wiring layer, disposed on both sides of the first signal line in the first direction, and given a first fixed potential; and a plurality of third shield lines formed in a second wiring layer formed on the semiconductor substrate, disposed with a first wiring width and at a first wiring interval in a second direction almost orthogonal to the first direction in a manner to partially overlap with each of the first signal line and the first and second shield lines, and given the first fixed potential.

Abstract: A circuit design support method includes obtaining layout data that indicates positions of a plurality of clock receivers disposed in a circuit and positions of first clock wires disposed in the circuit; and calculating, by a computer, a value corresponding to lengths of wires respectively connecting the clock receivers to second clock wires on the basis of the obtained layout data, the value being calculated for each of a plurality of combinations of a count of the second clock wires and positions of the second clock wires, the second clock wires being disposed in a wiring layer of the circuit and being perpendicular to the first clock wires.

Abstract: A semiconductor device has: a first signal line formed in a first wiring layer formed on a semiconductor substrate, and disposed in a first direction; first and second shield lines formed in the first wiring layer, disposed on both sides of the first signal line in the first direction, and given a first fixed potential; and a plurality of third shield lines formed in a second wiring layer formed on the semiconductor substrate, disposed with a first wiring width and at a first wiring interval in a second direction almost orthogonal to the first direction in a manner to partially overlap with each of the first signal line and the first and second shield lines, and given the first fixed potential.

Abstract: An electric circuit device operable under a power supply includes: a circuit; a first switch connected between the power supply and the circuit; a capacitor tending to produce a first leakage current; a second switch connected between the power supply and the capacitor, the second switch producing a second leakage current when it is cut off, the second leakage current being less than the first leakage current; and a switch controller for turning on the second switch while both the first switch and the second switch are turned off, and after a first time passes for turning on the first switch.

Abstract: An electric circuit device operable under a power supply includes: a circuit; a first switch connected between the power supply and the circuit; a capacitor tending to produce a first leakage current; a second switch connected between the power supply and the capacitor, the second switch producing a second leakage current when it is cut off, the second leakage current being less than the first leakage current; and a switch controller for turning on the second switch while both the first switch and the second switch are turned off, and after a first time passes for turning on the first switch.