The invention relates to silicone-urethane copolymers and methods for making the copolymers. The method includes: administering an effective amount of a phospholipase C inhibitor to a subject at a time in which enhanced paracellular permeability is desired; and enhancing paracellular permeability in the subject at the absorption site through the administering of the effective amount of the phospholipase C inhibitor. The correction value calculating means 7 calculates a correction value on the basis of the thermal displacement estimated by the thermal displacement estimating means 5 alone when the main spindle 15 is started up and rotated. A write pole is formed using a mask that includes a hard mask, a RIEable layer and an endpoint detection layer.