摘要:
An automated wiring pattern layout method is provided. With this method, a first wiring pattern is generated with width W and extending in a first direction, and a second wiring pattern is generated with width W and extending in a direction perpendicular to the first wiring pattern in a manner such that the end thereof ends at the end portion of the first wiring pattern. Moreover, an overlapping region is generated by bending an end of either one of the first or the second wiring pattern at a right angle to produce an L-shaped extension and overlaying the first and the second wiring pattern, and a rectangular-shaped VIA pattern is generated at the overlapping region.
摘要:
A computer-implemented method for designing a semiconductor integrated circuit, which optimizes the propagation delay of a path from a signal input terminal (source) to a signal output terminal (sink) on the same net, includes: calculating the ratio of the total sum of a gate input load capacitance to the wiring capacitance of the path from the source to the sink as a process variation sensitivity relating to the capacitance component of the path to be designed from the source to the sink, based on a circuit design information of a gate level of the semiconductor integrated circuit to be designed; and optimizing the process variation sensitivity relating to the capacitance component of each path in order that the process variation sensitivities relating to the capacitance components of all the paths are smaller than a reference value.
摘要:
An automated wiring pattern layout method is provided. With this method, a first wiring pattern is generated with width W and extending in a first direction, and a second wiring pattern is generated with width W and extending in a direction perpendicular to the first wiring pattern in a manner such that the end thereof ends at the end portion of the first wiring pattern. Moreover, an overlapping region is generated by bending an end of either one of the first or the second wiring pattern at a right angle to produce an L-shaped extension and overlaying the first and the second wiring pattern, and a rectangular-shaped VIA pattern is generated at the overlapping region.
摘要:
A semiconductor integrated circuit of a low power consumption type has modules (1) to which various supply voltages are provided. In each module (1), cells (3) are grouped into cell rows or cell columns. Only one of a wire (7) of a high supply voltage and a wire (5) of a low supply voltage is formed on each cell row or cell column in the module (1). Various supply voltages are provided into the target cell (3) through the electrical wires (5, 7).
摘要:
A method for arranging a group of logical cells through which a signal is transmitted within an allowable delay time, consisting of the steps of determining signal lines interconnecting the logical cells of the equipotential net, defining a critical path consisting of the signal lines of all the equipotential nets, classifying the logical cells positioned between the equipotential nets as path core cells and classifying the other logical cells as path branch cells, positioning the path core cells to shorten the length of a main signal route passing through the path core cells, positioning the path branch cells to shorten the distance between the main signal route and the path branch cell for each equipotential net, and decreasing the delay time of the critical path formed by the replaced path core cells and the replaced path branch cells within the allowable delay time.
摘要:
An arrangement method for logic cells in a semiconductor IC device, in which a plurality of logic cells are arranged on a semiconductor chip and wiring is performed between the logic cells so as to realize a desired circuit, comprises the steps of developing the logic cell informations to be arranged on the chip and already-arranged cell and wiring informations into connection pins and inhibited areas for wiring, converting the inhibited areas for wiring into equivalent pins so as to treat the inhibited areas for wiring equivalently with respect to the connection pins, and imaginarily dividing the chip into lattices and subsequently uniforming a ratio of a sum of the numbers of the connection pins and the equivalent pins to a region capable of arrangement in each lattice, whereby a position of each logic cell is determined.
摘要:
A reticle set includes a first reticle including a first wiring pattern having a first termination pattern; a second reticle including a plurality of via patterns; and a third reticle including a second wiring pattern having a second termination pattern and a second line pattern connected to an end of the second termination pattern.
摘要:
A noise suppression circuit encompasses an internal circuit, a bypass capacitor, first and second transistors. The internal circuit has high and low level terminals, and the low level terminal is connected to a low level power supply line. The internal circuit is supplied with enable and inverted enable signals. The first transistor has a first control electrode, and one main electrode is connected to the high level terminal. The first control electrode is supplied with the inverted enable signal. The bypass capacitor is connected between the other main electrode of the first transistor and the low level power supply line. The second transistor is connected between the other main electrode of the first transistor and a high level power supply line. The second transistor has a second control electrode supplied with the enable signal. The second transistor is not conductive when the internal circuit is active.
摘要:
In a pattern correction method, design layout data of a pattern designed by an automated layout unit is entered. An environmental profile is determined based on whether or not another graphics pattern exists at the surroundings of each correction target cell included in the entered design layout data. A target cell name is replaced with a prescribed cell name of correction pattern corresponding to the determined environmental profile by referencing a cell replacement table. An OPC correction pattern corresponding to the replaced cell name is imported from a cell library.
摘要:
A noise suppression circuit encompasses an internal circuit, a bypass capacitor, first and second transistors. The internal circuit has high and low level terminals, and the low level terminal is connected to a low level power supply line. The internal circuit is supplied with enable and inverted enable signals. The first transistor has a first control electrode, and one main electrode is connected to the high level terminal. The first control electrode is supplied with the inverted enable signal. The bypass capacitor is connected between the other main electrode of the first transistor and the low level power supply line. The second transistor is connected between the other main electrode of the first transistor and a high level power supply line. The second transistor has a second control electrode supplied with the enable signal. The second transistor is not conductive when the internal circuit is active.