A carrier head that has a base assembly, a retaining ring assembly, a carrier ring, and a flexible membrane is described. Between the first auxiliary wire and the second auxiliary wire, there are provided a positive-polarity amplifier circuit for receiving a positive data signal from the data signal line driving circuit and a negative-polarity amplifier circuit for receiving a negative data signal from the data signal line driving circuit. The resins are useful as tackifies in hot melt adhesives and hot melt pressure sensitive adhesives.