  The dynamical quantum effects arising due to the boundary presence with two
types of boundary conditions (BC) satisfied by scalar fields are studied. It is
shown that while the Neumann BC lead to the usual scalar field mass generation,
the Dirichlet BC give rise to the dynamical mechanism of spontaneous symmetry
breaking. Due to the later, there arises the possibility of the respective
phase transition from the normal phase to the spontaneously broken one. In
particular, at the critical value of the combined evolution parameter the usual
massless scalar QED transforms to the Higgs model.
