What is Global Routing and Detail Routing?

[energeticdin]

Hi all,

Can anyone tell me abt What is Global Routing and DetailRouting?
and its difference?

Thanks

 

[chetanbs]

Re: Reg: Routing

Global routing is focused on resolving congestion and timing issues. Global routing creates net segments and defines the initial routing topologies. The topologies include a layer assignment for each segment of each net. Each net segment is a total contiguous length of interconnect on a given layer.

Detailed routing:
• Analyzes the net-segment topologies
• Converts the segments to actual wires and vias that connect all pins of all nets
• Begins the process of correcting technology rule violations

Have told this from Magma perspective..... I feel there isnt much difference in other tools