| US 7,496,878 B2 | ||
| Automatic wiring method and apparatus for semiconductor package and automatic identifying method and apparatus for semiconductor package | ||
| Tamotsu Kitamura, Nagano (Japan); and Norihide Hanami, Nagano (Japan) | ||
| Assigned to Shinko Electrics Industries Co., Ltd., Nagano (Japan) | ||
| Filed on Apr. 12, 2005, as Appl. No. 11/103,626. | ||
| Claims priority of application No. 2004-118242 (JP), filed on Apr. 13, 2004. | ||
| Prior Publication US 2005/0229138 A1, Oct. 13, 2005 | ||
| Int. Cl. G06F 17/50 (2006.01) | ||
| U.S. Cl. 716—13 [716/12; 716/14; 716/15] | 44 Claims |
| 1. A semiconductor package automatic wiring apparatus which determines an optimum wiring route from each pad to a corresponding
one of vias on a semiconductor package having a multi-tier bonding pad structure in which pads to be connected to a semiconductor
chip are arranged in multiple rows, said apparatus comprising:
a row identifier identifying a row for said each pad as to which row said pad belongs to;
a tentative placer mapping a position of said each pad to a position on a matrix table after said each pad has been identified
by said row identifier as to which row said pad belongs to; and
a determiner reading out said matrix table and determining said optimum wiring route based on said read matrix table, wherein
a pad-to-pad space through which said wiring route can pass corresponds to a blank entry between adjacent columns in said
matrix table,
wherein said tentative placer includes
a drawer drawing an extension line on a virtual plane from said each pad identified by said row identifying as to which row
said pad belongs to, said extension line extending in a direction in which a wiring line is run from said semiconductor chip
to said pad or in a direction in which said pad is oriented, and
an evaluator evaluating a positional relationship between the extension line drawn from said pad belonging to a first row
and a pad belonging to a second row adjacent to said first row, and
wherein said matrix table is generated based on said positional relationship evaluated by said evaluator.
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