Method for producing a layout of element portions for a semicond

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364490, 364489, 364488, G06F 1560

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active

052126536

ABSTRACT:
A method for producing layout comprises the steps of: producing power line and other blocks according to inputted circuit configuration data represent kind, attribute data and element to be included in the semiconductor integrated circuit; determining kind of element portions arranged at each of the blocks according to the total area of each kind of the element portion in each block; moving the different kind of element portion in each block to one of blocks including the same kind of element portion; and arranging the element portions according to the data of a horizontal position. For obtaining a vertical length of each block, a minimum lengths of resistor and capacitor blocks are inputted; then the actual vertical length of the transistor block is determined; and then final vertical lengths of resistor and capacitor blocks are determined. A resistor or capacitor is modified in its shape if it has large length than the determined vertical length. A resistor or capacitor with large area is made with full vertical length of the layout. Other components are arranged between full vertical length blocks.

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"Automatic Placement and Routing of Gate Arrays" by G. Rabson, VLSI Design, Apr. 1984, pp. 35-43.
"Automatic Generation of Digital System Schematic Diagrams" by Arya et al., IEEE 22nd Design Automation Conf., 1985, pp. 388-395.

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