Crown forming method of forming crown on floating type magnetic head

Abstract

A crown forming method of forming a crown on a floating type magnetic head which includes the steps of placing an approximately rectangular-prism-shaped bar, which has magnetic head elements of not less than 1 formed on a side wall thereof in a row, on the convex surface of a jig whose radius of curvature is R,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,with the relationship between the radius of curvatures set to R,≧R,, deforming the bar to an arc shape along the longitudinal direction thereof and bonding it on the convex surface together with the elastic sheet, and lapping the surface to be processed by abutting it against the processing surface and moving the surface to be processed relative to the processing surface. A plurality of grooves may be formed on the surface to be processed between the respective magnetic head elements along the short direction of the bar so that the bar is divided into a plurality of divided surfaces, and lapping the respective divided surfaces of the bar is performed by abutting them against the concave processing surface of the lapping surface plate and moving the bar relative to the processing surface.