A spin cast film of poly(bisphenol-A carbonate) was analyzed by XPS using monochromatic AlKαexcitation. The measured atomic composition closely matched the expected stoichiometry of the polymer. Peak positions of the individual chemically shifted C 1sand O 1scomponents are reported. The results are in general agreement with other reported spectra of polycarbonate polymers: experimental, C 83.4% and O 16.6%; theoretical, C 84.2% and O 15.8%.