Data Sheet

LABCENTER ELECTRONICS LTD.
122
2) Place a rectangle around the bottom half of the IC as shown below.
U3 with a Keepout
This time we cannot move the keepout to remove the DRC errors as the positioning is sensitive.
Instead we can manually override the errors by launching the DRC dialogue, right clicking and
selecting the Ignore option from the resulting context menu.
Ignoring DRC errors
Design Rooms
Alternatively, we can designate this area of the board to have different design rules from
everywhere else. To do this, we select the room icon and drag a box around the area. Then we
set it up as a DRC room which needs to cover all layers (since the keepout is on all layers) and
give it a sensible name.