Design system for flip chip semiconductor device
First Claim
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1. A computer aided design (CAD) system for designing a layout of a flip chip semiconductor integrated circuit comprising:
- a first storage section for storing first information including information for locations and types of circuit blocks in an internal circuit, and information for prohibition of arrangement of interconnect lines which depends on said type of said circuit block concerned;
a second storage section for storing second information including design rule information and information for prohibition of arrangement of electrode pads which depends on said types of said circuit block concerned;
a third storage section for storing third information including information for a plurality of layout parts to be arranged, each of said layout parts including an electrode pad and an associated connection cell having a specified length; and
a layout/wiring design section for performing design arrangement and wiring of at least one circuit block and a plurality of said layout parts in an internal circuit based on said first through third information.
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Abstract
A CAD system includes a storage device for storing information for the types and positions of cell blocks to be disposed in an internal circuit area, prohibition of arrangement of power source lines and electrode pads, and a plurality of layout parts each including an electrode pad and a connection cell. Each of the layout parts is selected based on the distance between the electrode pad and an associated I/O cell, thereby obviating the step of wiring between the electrode pad and the I/O cell.
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Citations
8 Claims
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1. A computer aided design (CAD) system for designing a layout of a flip chip semiconductor integrated circuit comprising:
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a first storage section for storing first information including information for locations and types of circuit blocks in an internal circuit, and information for prohibition of arrangement of interconnect lines which depends on said type of said circuit block concerned;
a second storage section for storing second information including design rule information and information for prohibition of arrangement of electrode pads which depends on said types of said circuit block concerned;
a third storage section for storing third information including information for a plurality of layout parts to be arranged, each of said layout parts including an electrode pad and an associated connection cell having a specified length; and
a layout/wiring design section for performing design arrangement and wiring of at least one circuit block and a plurality of said layout parts in an internal circuit based on said first through third information. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. The CAD system as defined in
claim 8 , wherein said connection cell has an offset between a center of said connection cell and a center of said electrode pad, said offset being an integral multiple of a pitch of I/O cells.
Specification