Dear prof. Parikh,
I am not sure what you wish to do - the default contact setting is "Perfect connection". In that case, there are no elements created for the contact, the nodes of the 2 surfaces of the adjacent volumes are connected using Master-Slave connections.
Only if an interface (GAP) material is applied to the contact, mesh is created for the contact.
The word "partial" describes a contact between 2 surfaces where one is smaller than the other or which only overlap partially. It has nothing to do with the connection type / interface material.