Patent ID: 6276991
Filing Date: 2001-08-21
Classification: B24B,Y10T

Abstract:
A crown forming method of forming a crown on a floating type magnetic head by lapping a surface to be processed of an approximately rectangular-prism-shaped bar having a short direction and a longitudinal direction, the bar having a side wall which is adjacent to the surface to be processed, the side wall having magnetic head elements of not less than 1 disposed thereon in a row, and cutting the bar in the short direction thereof to manufacture the floating type magnetic head having a floating surface composed of the surface to be processed and at least one piece of the magnetic head elements, the method comprising the steps of:placing the bar on a convex surface of a jig whose radius of curvature is R.sub.1 through an elastic sheet while facing the surface to be processed of the bar to a lapping surface plate having a concave processing surface whose radius of curvature is R.sub.2 with the relationship between the radius of curvatures set to R.sub.1.gtoreq.R.sub.2 ;deforming the bar to an arc shape along the longitudinal direction thereof and bonding it on the convex surface together with the elastic sheet; andlapping the surface to be processed of the bar by abutting it against the processing surface of said lapping surface plate and moving the surface to be processed relative to the processing surface, thereby forming the crown on the floating surface of the floating type magnetic head.