  We explore the possibility of three phases in the core of neutron star in a
form of triple layers. From the center, strange quark matter, kaon condensed
nuclear matter and nuclear matter form a triple layer. We discuss how the phase
of strange quark matter is smoothly connected to kaon condensed nuclear matter
phase. We also demonstrate that the compact star with triple layered structure
can be a model compatible with the 1.97-solar-mass object PSR J1614-2230
recently observed.
