circuit layout
software: IC-station
input: s1238_delay schematic
output: s1238_delay layout
Note that recently Mentor Graphics moves to a new integrated tool set, which is called "da-ic" that combining PCB, IC together.
1)create a cell
-create a folder .../s1238/layout
(Layout Versus Schematic check is to guarantee that the layout matches the schematic, that is, the function of the circuit is not changed after layout. )
-correct minimum distance problem
(Note: After circuit layout, you can exact mask lumped parameters and run accusim to check your delay unit again. Please refer to "Insert Delay Unit->check delay unit->verify the delay requirement by accusim after layout" for more details.)