Title :
An Exact Jumper-Insertion Algorithm for Antenna Violation Avoidance/Fixing Considering Routing Obstacles
Author :
Su, Bor-Yiing ; Chang, Yao-Wen ; Hu, Jiang
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei
fDate :
4/1/2007 12:00:00 AM
Abstract :
We study in this paper the problem of jumper insertion on general routing (Steiner/spanning) trees with obstacles for antenna avoidance/fixing at the routing and/or postlayout stages. We formulate the jumper insertion for antenna avoidance/fixing as a tree-cutting problem and present the first optimal algorithm for the general tree-cutting problem. We show that the tree-cutting problem exhibits the properties of optimal substructures and greedy choices. With these properties, we present an O((V+D)lgD)-time optimal jumper-insertion algorithm that uses the least number of jumpers to avoid/fix the antenna violations on a Steiner/spanning tree with V vertices and D obstacles. Experimental results show the superior effectiveness and efficiency of our algorithm
Keywords :
integrated circuit design; integrated circuit interconnections; network routing; Steiner tree; antenna effect; antenna violation avoidance; antenna violation fixing; design for manufacturability; general routing tree; greedy choices; jumper-insertion algorithm; optimal substructures; physical design; postlayout stages; routing obstacles; spanning trees; tree-cutting problem; Conductors; Etching; Integrated circuit interconnections; Integrated circuit manufacture; Integrated circuit technology; Manufacturing; Plasma applications; Plasma materials processing; Routing; Wires; Antenna effect; design for manufacturability; physical design; reliability; routing;
Journal_Title :
Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on
DOI :
10.1109/TCAD.2007.892338
