Method for achieving the planarity of an active face for a magnetic recording/reading head

Abstract From the Canadian patent

The disclosure concerns a method for achieving the planarity of an active face for magnetic recording/reading heads, the planarity of the active face being obtained by grinding, the active face being of the type where, before the grinding operation the level of, the material forming the gap is in recess with respect to the magnetic poles, the method comprising the following steps:, - first step: deposition on said active face of a thin layer of non-magnetic material with a thickness at least equal to the recess of the gap - second step: grinding of the non-magnetic thin layer to obtain the planeity of the active face.