Method for automatic tab artwork building

Details Method for automatic tab artwork building Method for automatic tab artwork building

1993-08-16

1995-11-07

Teska, Kevin J.

Boots, shoes, and leggings

364488, 364490, 364491, H01L 2348, G06F 1750

Patent

active

054652170

ABSTRACT:
A method for automated artwork building which comprises determining a desired die pad pitch, assigning inner lead bonding positions for each lead based on the average die pitch. The desired outer lead bonding position is then determined for each lead. The allowable range of fan in and fan out angles for each lead is computed according to design and manufacturing constraints. An electrical cost function is formulated based on signal lead crosstalk and ground lead simultaneous switching noise. Each lead is then routed. The routing is repeated for each lead for each allowable combination of fan in and fan out angles. Finally the optimal routing is selected based on electrical characteristics.

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