JPH10244452A - Filamentary support polishing tape and method for polishing magnetic recording medium using filamentary support polishing tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a projecting material and a sticking material hindering low floating performance of a magnetic head by using a polishing tape by applying a mixture of abrasive grains and a binder solution to a filamentous support body. SOLUTION: A mixture of abrasive grains 2 and a binder liquid 3 is uniformly applied to a periphery of a filamentous support body 1, and a filamentous support body polishing tape 4 is formed. Therefore, the necessity of a slit is eliminated, and falling-off of the abrasive grains and a binder is restrained, and embedment of the abrasive grains 2 in a magnetic recording medium surface and a stain sticking to the binder can be restrained. A fishline or the like using a cotton thread or the like as a main component is used as the filamentous support body 1. It is better that a thickness of the thread is a core diameter smaller than a width of a magnetic head slider. A thickness of a binder layer is set to about 1/10 to about 1/100 of the core diameter, and flexibility is imparted. A magnetic medium is rotated and the filamentous support body polishing tape 4 is pressed against its surface, and the magnetic medium is moved and polished in the radial direction by a feed smaller than the core diameter. A projecting material and a sticking material of a surface can be uniformly removed thereby.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a thread-like support polishing tape and a method for polishing a magnetic recording medium using the thread-like support polishing tape.

[0002]

2. Description of the Related Art Conventionally, in polishing a surface of a magnetic recording medium such as a magnetic disk or the like, a mixture of abrasive grains 2 and a binder solution 3 is used as a polishing tape on a base film 1 having a polyethylene film as a support as shown in FIG. Is uniformly applied with a roll coater, and dried and slit at both ends to a predetermined tape width. However,
Since abrasive particles and binder fall off from the end surface of the slit, there is a problem in embedding the abrasive particles in the magnetic recording medium and in adhering and attaching the binder. The falling off of abrasive grains and binder generated from the slit end surface greatly varies depending on the slit position and the degree of wear of the knife edge, and is a serious hindrance in assuring low levitation of the magnetic head.

[0003] On the other hand, the width of a conventionally used polishing tape is 1/2 "(1) which is wider than the slider width of a magnetic head.
2.7 mm) width is the mainstream. As a problem in this case, as shown in FIG. 3, there is a problem that it is not possible to follow a minute change in the shape in the radial direction of the medium, polishing residue is generated, and the low flying property of the magnetic head is hindered. In particular, the medium outer peripheral region has minute inflection points called roll-off (surface sag) and ski jumps caused by the substrate manufacturing process, and these inflection points cannot be followed by the conventional polishing tape width. FIG. 4 shows the relationship between the radial position and the number of detected protrusions for a point where the number of detected protrusions in this area is large. As for the polishing of the polishing tape and the magnetic recording medium, for example, Japanese Patent Application Laid-Open No. 63-216678 and Japanese Patent Application Laid-Open No.
No. 73, and JP-A-3-104016.

[0004]

As described above, in the polishing tape of the prior art, no consideration is given to the removal of the abrasive grains or the binder from the end face of the slit. There was a problem of adhesion dirt. On the other hand, conventional polishing tapes do not take into account the ability to follow minute inflection points in the radial direction of the medium, and there is a problem in that polishing protrusions of minute projections that hinder the low flying performance of the magnetic head occur. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a polishing tape that suppresses the generation of falling off abrasive grains and binders, and to use this polishing tape to improve the ability to follow a radially inflection point on the medium surface and improve the magnetic field. It is an object of the present invention to provide a method for removing a projection or an adhering substance that hinders low flying performance of a head.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to provide a polishing tape in which a mixture of abrasive grains and a binder solution is uniformly applied to a thread-like support instead of a polyester film support, and a magnetic tape using the thread-like support polishing tape. This is achieved by polishing the recording medium.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a cross-sectional view of a thread-like support polishing tape according to the present invention. In this figure, the mixture of the abrasive grains 2 and the binder solution 3 is uniformly applied around the thread-like support 1 and there is no need for slits. It becomes a polishing tape with less embedding of abrasive grains in the binder and less contamination of the binder. Examples of the material of the thread-like support include cotton thread, silk thread, fishing line mainly composed of nylon, thread mainly composed of chemical fiber and the like. Also, the thickness of the yarn is preferably a core diameter smaller than the slider width of the magnetic head. Further, the thickness of the binder layer was applied to about 1/10 to 1/100 of the core diameter so as to have flexibility. FIG. 5 shows a method for polishing the surface of a magnetic recording medium using the thread-like support of the present invention. The magnetic medium 5 will be described as an example of the magnetic recording medium. The inner peripheral portion of the magnetic medium 5 is held and rotated, and a thread-like support polishing tape 4
To traverse the magnetic medium at a feed pitch smaller than the core diameter of the thread-like support polishing tape 4 in the radial direction of the magnetic medium 5 to uniformly remove protrusions or deposits interposed on the surface of the magnetic recording medium. In particular, the outer peripheral area of the magnetic medium
Roll-off (surface sag) that occurs during the substrate manufacturing process
There is a small inflection point called a ski jump, and it is possible to follow this inflection point by using a thread-like support polishing tape, and as a method to remove protrusions and deposits that hinder the low levitation of the magnetic head It is valid. At this time, the thread-like support polishing tape is always supplied from the supply reel at a predetermined speed so that new abrasive grains act.

[0008]

According to the present invention, there is no polishing tape slitting step causing embedding of abrasive grains and adhesion of binder, which are factors that hinder the low flying property of the magnetic head, and follows the inflection point. As a result, the uniform surface of the medium can be obtained without unevenness of removal of protrusions and adherents present on the surface of the medium.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a thread-like support polishing tape according to the present invention.

FIG. 2 is a sectional view of a conventional polishing tape.

FIG. 3 is a diagram showing a conventional method for polishing a magnetic recording medium.

FIG. 4 is a diagram showing a relationship between a radial position and the number of detected protrusions in a conventional polishing method.

FIG. 5 is a diagram showing a method for polishing a surface of a magnetic recording medium according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Support body, 2 ... Abrasive grains, 3 ... Binder solution, 4 ... Wrapping tape, 5 ... Magnetic medium,
6 ... Air nozzle part, 7 ... Contact roller part.

Claims (2)

[Claims] 1. A thread-like support polishing tape, wherein a mixture of abrasive grains and a binder solution is uniformly applied to the thread-like support. 2. A polishing method for a magnetic recording medium, comprising: bringing the thread-like support polishing tape into contact with the surface of a rotating magnetic recording medium and moving the polishing tape in a radial direction to polish the magnetic recording medium. Method.