Patent · US Expired

Testing a write transducer as a reader

US6587805B2 · kind B2 · utility

4Cited by
31References
15Claims
0Family size

Assignee

Inventor

Key dates

Filing dateFeb 20, 2001
Grant dateJul 1, 2003
Priority date—
Expiry dateMar 11, 2021

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG11B2005/0016
  • WIPO fieldBiotechnology
  • WIPO sectorChemistry

Abstract

A system for testing inductive write head elements of a head stack assembly (“HSA”). A completed HSA is placed in a test apparatus. Test probes are aligned and placed in electrical contact with the head elements, preferably at a location between the head and the preamplifier. The HSA is then placed in a changing magnetic field. A low frequency magnetic field may be applied to test the head elements. The changing magnetic field induces electrical signals within the head elements. By analyzing these electrical signals, the condition and characteristics of the each head element can be determined.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.