Patent ID: 8841629

Claim:
A substrate processing system comprising: a chamber body; a substrate support positioned within the chamber body; an ultraviolet radiation lamphead assembly fixed to the chamber body and spaced apart from the substrate support, the lamphead assembly having an ultraviolet bulb positioned in a resonant cavity, one or more microwave generators, and a screen positioned between the ultraviolet bulb and the substrate support; and an RF detector comprising an antenna and a circuit having a diode detector and an amplifier, wherein the RF detector is positioned to monitor low-level microwave excursions in a range that prevents damage to a substrate, wherein the antenna is unshielded and has two leg portions coupled to a hoop-shaped portion, the RF detector further comprises a circuit board within an RF housing, and the two leg portions of the antenna are coupled to the circuit board within the RF housing, wherein the RF housing has an antenna opening, and the two leg portions of the antenna extend a distance from the circuit board through the antenna opening to the hoop shaped portion of the antenna.