Patent ID: 6987269

Claim:
An integrated apparatus for monitoring charge erasure efficiency in a charge erasure tool, the apparatus comprising: a radiation chamber comprising a light source adapted to emit broadband radiation at or within wavelengths of about 180 nm to about 270 nm, wherein the radiation chamber contains a gas that is substantially non-absorbing at the wavelengths during operation; a process chamber comprising an in situ probe for monitoring an intensity of the broadband radiation at about 180 nm to about 270 nm, the in situ probe comprising a reflective and diffusive layer adapted for collecting light disposed within the process chamber, and a waveguide having one end in optical communication with the reflective and diffusive layer and an other end in optical communication with a sensor, wherein the waveguide has greater than about 50 percent transmission at wavelengths from about 180 nm to about 270 nm, and a filter intermediate to the waveguide and the sensor, wherein the filter is adapted to absorb wavelengths greater than about 270 nm; and a plate intermediate to the radiation chamber and the process chamber, wherein the plate is transmissive at wavelengths at about 180 nm to about 270 nm.