Patent ID: 8624168

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 comprising upper and lower electrically insulating layers; planar heater zones comprising at least first, second, third and fourth planar heater zones, each comprising one or more diodes as heater elements, the planar heater zones located between the upper and lower electrically insulating layers, 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 anodes of the one or more diodes of the first and second planar heater zones and a second electrically conductive power supply line electrically connected to anodes of the one or more diodes of the third and fourth planar heater zones; power return lines comprising at least a first electrically conductive power return line electrically connected to cathodes of the one or more diodes of the first and third planar heater zones and a second electrically conductive power return line electrically connected to cathodes of the one or more diodes of the second and fourth planar heater zones.