公开(公告)号：JP2000348303A

公开(公告)日：2000-12-15

申请号：JP16071199

申请日：1999-06-08

Applicant: IBM

Inventor： TANAKA HIDETSUGU ,  KANAMARU MASAYUKI ,  NAGAYOSHI MASAHIRO

IPC: G11B5/10 ,  G11B5/127 ,  G11B5/187 ,  G11B5/40 ,  G11B5/60 ,  G11B11/105

Abstract: PROBLEM TO BE SOLVED: To obtain a head which repels water and which has improved corrosion resistance by coating at least a part of the surface of a writing element or a reading element of the head surface with a substance having low surface energy. SOLUTION: A coating as a substitute for the substrate surface is formed so as to decrease the surface energy of the substrate surface, and the coating has moisture resistance and resistance against wetting. As for the material suitable for the thin film, FCOC(fluorinated carbon compds.) are used. As for an example of RCOC, a compd. containing perfluoroalkyl polyoxyethylene ethanol is selected. The FCOC is preferable because it can be formed into a thin film as a solid and a method for its formation by dipping and drawing up or by plasma CVD can be carried out.

公开(公告)号：GB2351839A

公开(公告)日：2001-01-10

申请号：GB0010554

申请日：2000-05-03

Applicant: IBM

Inventor： TANAKA HIDETSUGU ,  KANAMARU MASAYUKI ,  NAGAYOSHI MASAHIRO

IPC: G11B5/10 ,  G11B5/127 ,  G11B5/187 ,  G11B5/40 ,  G11B5/60 ,  G11B11/105 ,  G11B5/255

Abstract: To select suitable materials for highly corrosion resistant coating, and to form magnetic head coating in thin films of suitable thickness, in order to improve corrosion resistance of magnetic heads in HDDs and secure reliability of HDDs. At least parts of surfaces of write element or read element of the surface of the magnetic head are coated with low surface energy materials. Therefore, these coated surfaces do not easily attract water due to their humidity resistance, wetting resistance and hydrophobicity, resulting in improvement of corrosion resistance of these coated surfaces. As particular evaluation, surface energy values of water and low surface energy materials are determined. Then, as low surface energy materials FCOC (fluorocarbon compounds), and especially materials containing perfluoroalkylpolyoxyethyleneethanol are selected. Particular surface energy values of selected materials are also determined. Further, in forming thin films of low surface energy materials on magnetic heads, their preferable thickness is selected to be 5 - 100 Ñ, 10 - 20 Ñ being more preferable.