Patent US3086218A successfully refreshed from Google Patents.
Patent JPS6484486A successfully refreshed from Google Patents.
← Back to Patent Explorer
JPS6484486A Expired / Lapsed JP ⏱️ 0.0 years remaining

Magnetic recording/reproducing device and magnetic head

Assignee: TDK Corp
•
Filing: 1987-09-26
•
Granted: —
•
Expires: 2007-09-26
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract PURPOSE:To obtain a device with high durability and without an absorption phenomenon by combining a magnetic disk with a surface roughness of <=100Angstrom , and a magnetic head with the area of a medium facing surface to be the lift generating part of a slider of <=2mm<2>. CONSTITUTION:A magnetic recording layer 32 with a film width of approximately 0.5mum is formed on the surface of a rigid structure 31 of a glass plate, etc., by a vacuum film forming method. The surface characteristics of the structure 31 becomes those of the recording layer 32, and its surface roughness Rmax is set at <=100Angstrom . Especially when it is at <=50Angstrom , the magnetic disk 3 and the magnetic head 4 do not collide even if they are operated in a semi-contact condition, and the durability is improved. Next, a slider 41, in which the area of a medium facing surface 411 to be the lift generating part of the magnetic head 4 is <=2mm<2>, holds a reading/writing element 42. By constituting in such a way, even at the time of the operation of a semi-contact system, the device can be highly durable without the absorption phenomenon.

Inventors

  • 👤 Kazumasa Fukuda
  • 👤 Masanori Sakai
  • 👤 Jiyouichirou Ezaki
  • 👤 Mikio Matsuzaki

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-07 21:20
CPC Classifications
—

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

JPS56107363A Cited
JPS61287028A Cited

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag