Method for detection of end of grinding of a thin layer magnetic head

摘要

PCT No. PCT/FR88/00518 Sec. 371 Date Jun. 26, 1989 Sec. 102(e) Date Jun. 26, 1989 PCT Filed Oct. 21, 1988 PCT Pub. No. WO89/04038 PCT Pub. Date May 5, 1989.The invention concerns a method for the detection of the end of grinding of at least one thin layer magnetic head, the head comprising, at the stage of implementation of said method, an active face, formed by two magnetic poles (1, 2) separated by a gap (4). The method comprises the following steps: deposition of a conductive layer (7) on the entire active face (3) etching of the active face coated with said conductive layer; deposition of a layer of dielectric material (8) on the etched active face; grinding of the active face starting from the face that is free of the layer of dielectric material (8) until total removal of that part of the conductive layer (7) located above the gap (4), this removal being detected by the sudden variation in resistivity between the two magnetic poles (1, 2).