JPH0271420A - Manufacture of floating type magnetic head - Google Patents

Abstract

PURPOSE:To obtain a floating type magnetic head whose assembly operability is good and electromagnetic conversion characteristic is excellent by arranging, in a recessed part, a head core chip which a glass film is formed on faces facing to the internal surface of the recessed part of a slider and glass-molding it with glass whose melting point is lower than that of the glass film. CONSTITUTION:A high melting point glass film 12 is formed by a sputtering method on both side faces of a head core chip 11, namely, the faces facing to the internal surface of the recessed part 4 of a slider 1. The head core chip 11 on which the high melting point glass film is formed like this is stored into the recessed part of the slider 1 and after that, the head core chip is fixed in the recessed part 4 by the low melting point glass. Thus, at the time of the glass mold of the head core chip 11, the mold glass is prevented from erod ing a magnetic head and it can be suppressed that a crack or a chipping occurs on the core chip 11 itself by a jig. etc., used when the core chip 11 is positioned in the recessed part 4 of the slider 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing a v-single-acting magnetic head used in fixed magnetic disk drives, etc. A conventional method of manufacturing a magnetic head will be explained with reference to FIG.

In FIG. 4, reference numeral 1 denotes a slider made of a non-magnetic material such as ceramic, and a pair of floating rails 2 are integrated on both ends of the upper surface 1a of this slider 1, that is, the surface facing the magnetic recording medium. Further, a groove 3 for winding a recording/reproducing coil is formed on the end surface 1b.

A recess 4 is provided in the floating rail 2 on the lower side, and a head core chip 5 (an enlarged view of which is shown in FIG. 5) that performs electromagnetic conversion is placed on its upper surface, that is, the surface facing the magnetic recording medium. The head core chip 5 is placed in the recess 4 so that the head core chip 5a is flush with the upper surface of the floating rail 2, and the space between the head core chip 5 and the inner surface of the recess 4 is glass-molded with low melting point glass. was fixed in the recess 4 to form a floating magnetic head. Note that 6 indicates a glass mold portion, and 7 indicates a head gap portion.

Problems to be Solved by the Invention However, in the above-described conventional method for manufacturing a floating magnetic head, the head core chip is temporarily fixed in the recess 4 of the slider 1 using a jig or the like, and then molten glass is poured from above the recess 4. Since the head core chip 5 is formed by pouring it into the mold, cracks and chipping are likely to occur in the track portion of the head core chip 5 due to handling during work. As shown in the figure, there is a problem in that the mold glass in the held gap portion 7 of the head core chip 5 is eroded and the magnetic conversion characteristics are deteriorated.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and an object of the present invention is to provide a manufacturing method capable of obtaining a floating magnetic head that is easy to assemble and has good electromagnetic conversion characteristics.

Means for Solving the Problems In order to solve the above problems, the method for manufacturing a floating magnetic head of the present invention includes forming a glass film on the surface facing the inner surface of the recess of the slider of the head core chip; The head core chip thus prepared is placed in the recess and molded with glass having a melting point lower than that of the glass film.

Function: Since the glass on the side surface of the head core chip has a higher melting point than the mold glass, it is possible to prevent the mold glass from corroding into the magnetic gap portion during glass molding of the head core chip. In addition, the glass on the side surface protects the head core chip, making it possible to prevent cracking or chipping of the core chip itself caused by a jig or the like used to position the core chip within the recess of the slider.

EXAMPLE Hereinafter, an example of the method for manufacturing a floating magnetic head of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an assembled view of the floating magnetic head, and FIG. 2 is a perspective view of the head core chip. In this embodiment, the same components as those in the prior art are given the same numbers and their explanations will be omitted.

First, both sides of the head core chip 11 (that is, the sides facing the inner surface of the recess 4 of the slider I of the head core chip) 1
A high melting point glass film 12 is formed on 1a and 11b by sputtering. Then, the head core chip 11 with the high melting point glass film formed thereon is placed on the slider 1.
Then, the head core chip is fixed in the recess 4 using low melting point glass. However, during this fixing work, the surface 1 of the core chip facing the magnetic recording medium must be
Needless to say, it is arranged in the recess 4 so that the floating rail 1c is flush with the upper surface of the floating rail 2.

By manufacturing a floating magnetic head in this manner, the following effects can be achieved.

In other words, since a glass film having a melting point higher than that of the molded glass is formed by sputtering,
When glass-molding the head core chip into the recess, this glass film acts as a barrier layer and can prevent the mold glass from eroding into the head gap. In addition, since the glass membrane protects the head core chip,
The occurrence of cracks and chipping in the head core chip can be suppressed by the jig used when arranging the head core chip in the recess. In addition, in the conventional manufacturing method, the head core chip was directly fixed in the recess of the slider with molten glass, so the core and molten glass did not have good compatibility, so the adhesive strength between them was not as strong. By forming the glass film on the core surface by sputtering and then molding the glass into the recesses as in this embodiment, there is also the effect that strong adhesive strength can be obtained.

That is, during sputtering, glass particles enter into the many recesses present on the core surface, so that the adhesive strength between the glass film and the core becomes extremely strong.

When the head core chip on which this glass film is formed is glass molded, the affinity between the mold glass and the glass film is very good since both are glass, so the head core chip is placed inside the recess of the slider. It is securely fixed.

In this example, the glass film was formed on both sides of the core chip, but the glass film may be formed only on both sides of the gap portion of the core chip, as shown in FIG.

Effects of the Invention The method for manufacturing a floating magnetic head of the present invention includes forming a glass film on a surface of a head core chip that faces the inner surface of a recess of a slider, and placing the head core chip on which the glass film is formed in the recess. The glass on the side surface of the head core chip has a higher melting point than the mold glass, so when glass molding the head core chip, the mold glass is molded into the magnetic gap part. This can prevent erosion. In addition, the glass on the side surface protects the head core chip, making it possible to prevent cracks and chipping from occurring in the core chip itself due to the jig used to position the core chip within the recess of the slider.

[Brief explanation of the drawing]

FIG. 1 is an assembly diagram when assembling a floating magnetic head in the method for manufacturing a floating magnetic head of the present invention, FIG. 2 is a perspective view of a head core chip, and FIG. 3 is a perspective view of a head core chip used in other embodiments. 4 is an assembled view of a floating magnetic head assembled in a conventional method for manufacturing a floating magnetic head, FIG. 5 is a perspective view of a head core chip, and FIG. 6 is an enlarged view of a helad gap portion. 1...Slider, 2...Rail for floating, 3...
Groove, 4... recess, 5... head core chip, 6...
・Glass mold part, 11... Head core chip, 11a', llb... Side surface of head core chip 11,
12... Name of high melting point glass membrane agent Patent attorney Shigetaka Awano and 1 other person Figure 1 Atsushi 2 Figure / C / Figure 3 Figure Figure Figure

Claims (1)

[Claims] A recess is formed in a part of a slider made of a non-magnetic material and has a floating rail on a surface facing a magnetic recording medium, and a head core chip having a recording/reproducing gap is placed in the recess of the slider. A method for manufacturing a floating magnetic head fixed in the recess by glass molding, the method comprising: forming a glass film on a surface of the head core chip facing the inner surface of the recess of the slider; A method for manufacturing a floating magnetic head, characterized in that a head core chip is placed in the recess and molded with glass having a melting point lower than that of the glass film.