Collaborative design method for power/ground network and layout planning based on pattern matching
A technology of pattern matching and layout planning, applied in computing, electrical digital data processing, special data processing applications, etc.
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[0075] Step (1) The computer reads in the initial layout information and the constraint file, which includes three kinds of electrical performance constraints:
[0076] a. Voltage drop constraint, for each power supply pin p of module k i must be satisfied: the voltage value V on this pin pi Greater than or equal to the minimum value V that the module needs to obtain voltage from the power line min,k , for each ground pin p of module k i must satisfy V pi Less than or equal to the maximum voltage V that the module needs to get from the power line max,k; ;
[0077] b. Minimum line width constraint, a connection node n on the power / ground network 1 and n 2 The width of the branch b must be greater than the given minimum width value;
[0078] c. Electromigration constraints, that is, maximum current density constraints, expressed as:
[0079] |V n1 -V n2 |≤ρ·l b σ,
[0080] Among them, V n1 , V n2 node n i1 and n i2 voltage on, l b for connecting node n 1 and n ...
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