Abstract: Provided is a polishing pad comprising a polishing layer made of a polyurethane resin foam containing an isocyanate-terminated prepolymer, and a curing agent, wherein the ratio (NC80/NC40) of a weight proportion (NC80) of an amorphous phase content in the polishing layer measured at 80° C. by a pulsed NMR method to a weight proportion (NC40) of the amorphous phase content in the polishing layer measured at 40° C. by the pulsed NMR method is between 1.5 and 2.5.

Abstract: A conductive wire welded structure of which a stator is composed can be obtained using a conductive wire welding method in which a plurality of conductive wires are welded together using a high-frequency induction heating device. This conductive wire welding method involves performing a disposition step in which a plurality of conductive wires are made to intersect and the end of at least one of the conductive wires is disposed at a location that is extended from an intersection portion, and a welding step in which the end of the at least one conductive wire that is at a location extended from the intersection portion is welded outside an induction heating coil by induction heating, and the welded material thereof is solidified at the intersection portion.

Abstract: A conductive wire welded structure of which a stator is composed can be obtained using a conductive wire welding method in which a plurality of conductive wires are welded together using a high-frequency induction heating device. This conductive wire welding method involves performing a disposition step in which a plurality of conductive wires are made to intersect and the end of at least one of the conductive wires is disposed at a location that is extended from an intersection portion, and a welding step in which the end of the at least one conductive wire that is at a location extended from the intersection portion is welded outside an induction heating coil by induction heating, and the welded material thereof is solidified at the intersection portion.