Generating database for cells routable in pin layer

摘要

A method of wire routing is provided. The method comprises obtaining data of cell layouts, generating a first database for the cell layouts, identifying, for each cell in the first database, whether the cell and another cell in the first database are routable in a pin layer, and generating a second database for routable cells.

主权项

1. A method of wire routing, comprising:
obtaining data including information on connectivity of cells; obtaining data of cell layouts; generating a first database for the cell layouts; identifying for each cell in the first database, whether the cell and another cell in the first database respectively have pins that are routable in only a pin layer used for the pins; and generating, by at least one processor, a second database for routable cells; performing, by at the least one processor, a first placement based on the data including information on connectivity of cells; generating, by the at least one processor, a third database for the first placement; and performing, by the at least one processor, a second placement based on data from the second database and third database to generate a fourth database; wherein in the third database, a first pair in the pairs of cells are not positioned such that the respective pins of the first pair of cells are routable in only the pin layer; and
in the fourth database, the first pair of cells are re-positioned such that the respective pins of the first pair of cells are routable in only the pin layer.