0.18 technology cadence
poly can be used to make gate , poly resistance and poly-poly cap. , each poly layer "i think" should be used for certain thing, u should refer to the PDK refrence for details about which poly is used for which thing,
i think that poly1 is used for gate and maybe resistors , while poly2 is used is used for caps. , note also that in caps the poly is required to be conductive as possible "ideally metal cap. which has infinte conductivity", while in resistors u want the resistor to be with low conductivity. " i think there is some special poly called HR (high resistance), but i am not sure , so u should refer to ur PDK to know which is he correct poly and to know also the rules for each layer.