| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that micropores of 100-500 nm in diameter are easily generated in a flow channel face, which is gained by an ion milling processing method or a reactive ion etching method, due to the insufficient homogenization of crystal texture in a substrate for a magnetic head suitably used in a miniaturized slider such as a femto-slider and an ato-slider. <P>SOLUTION: A substrate 1 for a magnetic head comprises a sintered body which comprises Al<SB>2</SB>O<SB>3</SB>of 35 mass% or more to 70 mass% or less and TiC of 30 mass% or more to 65 mass% or less. In addition, a difference in lattice constant between the both main face parts 3 and center part 2 in the thickness direction of the substrate 1 for a magnetic head is 1×10<SP>-4</SP>nm or smaller. By this, variations in roughness of flow channel faces are made small, the flow channel faces being obtained by removing the parts of mirror planes by an ion milling processing method or a reactive ion etching method after the substrate for a magnetic head is cut into rectangular slices and the sections are polished to make them the mirror planes. <P>COPYRIGHT: (C)2008,JPO&INPIT |
