Patent ID: 8546732

Claim:
A heating plate for a substrate support assembly used to support a semiconductor substrate in a semiconductor processing apparatus, the heating plate comprising: an electrically insulating layer; planar heater zones comprising at least first, second, third and fourth planar heater zones, each comprising one or more heater element made of an insulator-conductor composite, the planar heater zones laterally distributed across the electrically insulating layer and operable to tune a spatial temperature profile on the semiconductor substrate; power supply lines comprising at least a first electrically conductive power supply line electrically connected to the first and second planar heater zones and a second electrically conductive power supply line electrically connected to the third and fourth planar heater zones; power return lines comprising at least a first electrically conductive power return line electrically connected to the first and third planar heater zones and a second electrically conductive power return line electrically connected to the second and fourth planar heater zones.