The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 09, 1988
Filed:
Apr. 28, 1986
Upali Bandara, Stuttgart, DE;
Gerhard Elsner, Sindelfingen, DE;
Volker Heinrich, Wiesbaden-Nordenstadt, DE;
Holger Hinkel, Boblingen, DE;
Artur Lang, Worms, DE;
Erwin Prinz, Aidlingen, DE;
Werner Steiner, Boblingen, DE;
Werner Zapka, Gaertringen-Rohrau, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Method for measuring the properties of a slider/disk interface in a magnetic disk storage apparatus by measuring a triboelectric current flowing between disk and slider. Rotational speed is adjusted between 100 and 500 rpm so as to obtain a frictional contact between disk and slider. The shape of the tribo current curve obtained during the measuring time interval is analyzed. An early maximum of the tribo current amplitude and a subsequent continual decay indicates a good slider/disk interface and a long lifetime.