公开(公告)号：JPH10105933A

公开(公告)日：1998-04-24

申请号：JP17977097

申请日：1997-07-04

Applicant: IBM

Inventor： ERHART THEODORE SELLECK ,  CLINTON DAVID SNYDER ,  MIKE SACK

IPC: G01N17/00 ,  G11B5/255 ,  G11B5/455

Abstract: PROBLEM TO BE SOLVED: To compose an open circuit indicating that a transducer has reached its wear limit, by monitoring a resistance of an electric circuit during disk drive operation, attaching a part of this circuit structure to a slider, and being physically worn together with the transducer. SOLUTION: A reading transducer 50 is a magneto-resistance type and a writing transducer 52 is an induction type, and lead wires 54 are connected to contact pads 55 of a slider 38; one pair of the lead wires 54 are connected to the reading transducer and the other pair of the lead wires are connected to the writing transducer. The transducers 50, 52 have usable thickness of chips to some extent, and when the usable thickness is worn out from wearing of the chips with the magnetic disk 32, the transducers become unusable. Thus, worn-out conditions, namely, usable lives of the transducers are indicated.

公开(公告)号：SG79174A1

公开(公告)日：2001-03-20

申请号：SG1996000130

申请日：1994-03-22

Applicant: IBM

Inventor： ROBERT EDWARD FONTANA JR ,  CHERNGYE HWANG ,  VLAD JOSEPH NOVOTNY ,  TIMOTHY CLARK REILEY ,  CELIA ELIZABETH YEACK-SCRANTON ,  CLINTON DAVID SNYDER

IPC: G11B5/10 ,  G11B5/187 ,  G11B5/255 ,  G11B5/31 ,  G11B5/39 ,  G11B5/48

Abstract: A contact recording disk file uses an integrated head-suspension assembly having a head carrier with a dual-layer wear pad for contacting the disk during read and write operations. The outer wear layer of the pad is relatively soft and wear prone compared to a harder and more wear-resistant inner layer. The outer wear layer wears away at a relatively rapid rate during initial wear-in of the head carrier. In this manner the head pole pieces, which extend into the wear pad, are rapidly put into contact with the disk, thereby compensating for initial misalignment of the wear pad with the surface of the disk. The inner wear layer then provides wear resistance over the life of the disk file. In the preferred embodiment, both the outer and inner wear layers are formed of essentially amorphous carbon doped with different amounts of hydrogen.