Cluster Method and Its Application to LSI/VLSI Layout
群法及其在LSI/VLSI自动布图设计中的应用

The cluster method is systematically studied. A series of new ideas, such as steady clusters,levels of steady clusters,absolutely closed steady clusters are introduced. Some important pro-perties of steady clusters are proven.The cluster intensity applied in the typical cluster me-thod is unreliable and is replaced by steady clusters.The comparison of the results obtainedby typical cluster method with the results obtained by our cluster method is very satisfactory.