  Characteristics of relaxed density profile and conformation of polymer chains
are studied by a Monte Carlo simulation on a discrete lattice in three
dimensions using different segmental (kink-jump $K$, crank-shaft $C$, reptation
$R$) dynamics. Three distinct density regimes, substrate, bulk, and interface,
are identified. With the $KC$ segmental dynamics we find that the substrate
coverage grows with a power-law, $d_s \propto t^{\gamma}$ with a field
dependent nonuniversal exponent $\gamma = 0.23 + 0.7 E$. The bulk volume
fraction $d_b$ and the substrate polymer density ($d_s$) increases
exponentially with the field ($d_b \propto E^{0.4}$, $d_s \propto E^{0.2}$) in
the low field regime. The interface polymer density $d_f$ increases with the
molecular weight. With the $KCR$ segmental dynamics, bulk and substrate density
decreases linearly with the temperature at high temperatures. The bulk volume
fraction is found to decay with the molecular weight, $d_b \propto
L_c^{-0.11}$. The radius of gyration remains Gaussian in all density regions.
