Complexity results for automatic layout design

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6636057

Tuan, T C

Three approaches of the layout design problem of integrated circuits are examined. The first approach of interest is river routing. The single layer wiring problem of providing a one-to-one connection between two sets of terminals that lie on two horizontal lines by means of wires, in the forms of disjoint rectilinear curves in the plane, is called the river routing problem. The second approach of interest is single row routing. Given a set of terminals on a line, and a partition of these terminals into nets, the single layer wiring problem that any two rectilinear wires have no point in common is called the single row routing problem. This problem is of interest because a general multilayer Printed Circuit Board (PCB) routing problem can be systematically decomposed into a number of independent single layer single row routing problems. The third approach of interest is two-layer channel routing, which has two parallel rows of terminals along a channel. Each net consists of one terminal from an upper row and the other from a lower row, and a rectilinear wire connects these two terminals. Horizontal segments lie on one layer and vertical segments on the other layer. Segments on different layers can be connected through vias.

• Research Organization: Northwestern Univ., Evanston, IL (USA)
• OSTI ID: 6636057
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
990210* -- Supercomputers-- (1987-1989)
ALGORITHMS
AUTOMATION
DESIGN
ELECTRONIC CIRCUITS
INTEGRATED CIRCUITS
MATHEMATICAL LOGIC
MICROELECTRONIC CIRCUITS
OPTIMIZATION
PRINTED CIRCUITS
ROUTING