  The purpose of this paper is to investigate the geometric properties of real
hypersurfaces of D'Angelo infinite type in ${\mathbb C}^n$. In order to
understand the situation of flatness of these hypersurfaces, it is natural to
ask whether there exists a nonconstant holomorphic curve tangent to a given
hypersurface to infinite order. A sufficient condition for this existence is
given by using Newton polyhedra,which is an important concept in singularity
theory. More precisely,equivalence conditions are given in the case of some
model hypersurfaces.
