  The effect of quark-antiquark potential on the dissociation energy and
critical screening length of heavy meson like $b\overline{b}$ and
$c\overline{c}$ have been investigated when the respective meson is in quark
Gluon Plasma(QGP). The different types of interquark potential have been used
which get screened in the QGP medium. The dissociation energy and critical
screening length have been studied for both ground and excited states. It has
been observed that the form of interquark potential has substantial effect on
the critical screening length when the meson is in QGP. A comparison with other
theoretical studies are made.
