Patent ID: 6411464
Filing Date: 2002-06-25
Classification: G11B

Abstract:
A magnet head which includes a sliding member made from a polycrystalline nonmagnetic ceramic formed of at least two or more compound phases with different etching properties and a core member, wherein a center line average roughness Ra of a bearing surface of the core member that faces a magnetic recording medium is 3.0 nm or less, the sliding member consists of a surface with fine irregularities that the center line average roughness Ra of the bearing surface that faces the magnetic recording medium exceeds 3.0 nm, and a tip of each protrusion is an almost flat surface, while the average diameter Da of the surface of the tip of each protrusion is 2 &mgr;m to 10 &mgr;m, and furthermore a height of the surface of the core member is provided co-planar with a height of a substantially flat surface at said tip of each protrusion of the sliding member.