100  US 9,551,933 B2  no acid-decomposable group. The alicyclic hydrocarbon  structure in the alicyclic hydrocarbon structure substituted  with a hydroxyl group or a cyano group is preferably an  adamantyl group, a diamantyl group or a norbomane group.  The alicyclic hydrocarbon structure substituted with a  hydroxyl group or a cyano group is preferably a partial  structure represented by the following formulae (VIIa) to  (Vlk). Thanks to this repeating unit, adherence to substrate  and affinity for developer are enhanced.  In formulae (VIIa) to (Vlk), each of R$_{2}$c to Ric inde› pendently represents a hydrogen atom, a hydroxyl group or  a cyano group, provided that at least one of R$_{2}$c to Ric  represents a hydroxyl group. A structure where one or two  members of R$_{2}$c to R$_{4}$ c are a hydroxyl group with the  remaining being a hydrogen atom is preferred. In formula  (VIIa), it is more preferred that two members ofR$_{2}$c to Ric  are a hydroxyl group and the remaining is a hydrogen atom.  The repeating unit having a partial structure represented  by formulae (VIIa) to (Vlk) includes repeating units rep› resented by the following formulae (Alla) to (AIIc):  In the case where the polar group contained in the  repeating unit having a polar group is an alcoholic hydroxy  group or a cyano group, one preferred embodiment of the  repeating unit is a repeating unit having an alicyclic hydro- carbon structure substituted with a hydroxyl group or a  cyano group. At this time, the repeating unit preferably has  (Alla)  4:-4R;c  R2c  (Vila)  R$_{2}$c  ~c  R$_{3}$c  (Vllb)  (Vile)  -continued  Ra  Ra  OH  HO  OH  OH  Ra  Ra  Ra  Ra  Ra  Ra  .  OH  OH  OH  Ra  Ra  HO  OH  OH  HO  Ra  Ra  Ra Ra  •tt•  *  ~OH  OH  OH  99 