  We develop a new version of the superfield Hamiltonian quantization. The main
new feature is that the BRST-BFV charge and the gauge fixing Fermion are
introduced on equal footing within the sigma model approach, which provides for
the actual use of the quantum/derived antibrackets. We study in detail the
generating equations for the quantum antibrackets and their primed
counterparts. We discuss the finite quantum anticanonical transformations
generated by the quantum antibracket.
