Patent ID: 6141859
Filing Date: 2000-11-07
Classification: G11B,Y10T

Abstract:
A method for making a merged head device, comprising the steps of:forming two magnetic shield films which are close and parallel disposed on a wafer of composite ceramics composed of alumina and titanium carbide and a magnetoresistive effect unit composed of a magnetoresistive effect element which is disposed through a magnetic separating layer of an insulator between said two magnetic shield films;forming an inductive head unit which is composed of one magnetic pole film corresponding to one of said two magnetic shield films, the other magnetic pole film and a coil to be sandwiched by an insulator which are disposed on the other side of said one magnetic pole film where said magnetoresistive effect head does not exist, and recording is conducted by magnetic field which generates at a magnetic gap between said one magnetic pole film and said other magnetic pole film;cutting said wafer to form a bar shape;polishing a medium opposing plane of said bar shaped wafer;forming concave portions on both sides of said other magnetic pole film so as to define a width of said other magnetic pole film exposed on said medium opposing plane;providing alumina film to fill said concave portions;polishing said medium opposing plane on which non-magnetic film is formed so as to define a depth of said magnetoresistive effect element and said magnetic pole films from said medium opposing plane; andprocessing a slider after said concave portions are completely filled with alumina film.