Patent ID: 6081402
Filing Date: 2000-06-27
Classification: G11B

Abstract:
A thin film magnetic head linear arm, having a head surface, comprising:(a) a support member having a surface which constitutes a part of said head surface;(b) a plurality of thin film magnetic heads etched into said support member;(c) said thin film magnetic heads being of first and second types: the heads of the first type each having first and second pole pieces connected by a back portion, a front portion of the first pole piece being a long pole tip, P1T, and a front portion of the second pole piece being a short pole tip, p2T; the heads of the second type each having first and second pole pieces connected by a back portion, a front portion of the first pole piece being a short pole tip, p1T, and a front portion of the second pole piece being a long pole tip, P2T;(d) a gap layer, G, being placed between the long and short pole tips of said thin film magnetic head of the first type forming a tip and gap layer relationship P1T.vertline.G.vertline.p2T, and being placed between the short and long pole tips of said thin film magnetic head of the second type forming the tip and gap layer relationship p1T.vertline.G.vertline.P2T;(e) said long pole tip, and short pole tip, of each said thin film magnetic head having top and bottom oppositely facing film walls which are bounded in part by a side wall, a left (or front) wall, and a right (or back) wall, the top wall and side wall and bottom wall being contiguous with respect to each another;(f) said side walls of each pair of pole tips being oppositely faced one another;(g) said gap layer having top and bottom oppositely facing film walls being bounded in part by two side walls and a left (or front) wall and a right (or back) wall;(h) the bottom walls of all said long pole tips and short pole tips and the bottom walls of all said gap layers, of all said thin film magnetic heads, being arranged lying on a common plane forming a portion of said head surface;(i) each said thin film magnetic head being coiled by a conductor a number of turns about the first pole piece and/or the second pole piece, or about the back portion, said conductor having first and second terminal ends for feeding signals to said head or reading signals from said head;(j) all said thin film magnetic heads of two types being stacked into said support member alternatively in a first type head, second type head, first type head, second type head arrangement in a one-by-one, front-back relationship;(k) all said conductor terminal ends of all said thin film magnetic heads in said support member being connected to a demultiplexer which connects to a read/write signal integrated circuit;(l) means for connecting said conductor terminal ends of all said thin film magnetic heads to said demultiplexer and said read/write signal integrated circuit.