blockages

Here have some narrow channels which we want to fill with some placement blockages so cells don't place in these area.
Here is the way to do this:

1) Using finishFloorplan

The finishFloorplan command can be used to fill channels of a specified width with the specified blockage type.
For example, the following will fill any channels with a hard blockage if the channel width is less than 10um wide occurring between the core edge , hard macros, and hard blockages:

setFinishFPlanMode -activeObj {core macro hardBlkg} -direction xy -override false
finishFloorplan -fillPlaceBlockage hard 10

2)Use checkFPlan -narrow_channel to determine narrow channels and fill them

This method uses the violation markers from checkFPlan -narrow_channel to identify where to create blockages.

1. clearDrc

2. Source the file containing the code below. Change the width of the channel to your desired value.

## to check narrow channel of 10 um
checkFPlan -narrow_channel 10

proc mk_create_narr_ch_blk { } {
  set f [open narrowChannels_blk.tcl "w"]
  foreach marker_id [dbGet top.markers] {
    set db_userType [dbget $marker_id.userType]
    set db_box [dbget $marker_id.box]
    if {[regexp "narrowChannels" $db_userType] } {
      #Puts " $db_userType"
      puts $f "createPlaceBlockage -type hard -name NARROWCHANNEL -box $db_box"
    }
  }
  close $f
}

## End

3. Run the procedure above:

mk_create_narr_ch_blk

4. Source the resulting file to add the blockages:

source narrowChannels_blk.tcl