Wafer for magnetic head and magnetic head

摘要

A wafer includes an insulating layer provided on a wafer substrate and formed of a film composition represented by a formula, Al-N(1-x)-Ox (wherein 0.05<=x<=0.8).There is provided a wafer for a magnetic head as well as a magnetic head which is excellent in heat transferring property; in which the instability of a magnetic head characteristic due to a temperature rise is produced, and a reduction in output due to the polishing at a finishing step cannot be produced; and which is excellent in water resistance.