JPH03230315A - Magnetic head - Google Patents

Abstract

PURPOSE:To lower the electric resistance between a magnetic core and a gimbal spring so as to decrease fluctuations and to prevent the deterioration in characteristics by providing a chamfered part to the edge of the adhering surface of the magnetic core and the gimbal spring and packing a conductive adhesive to this part. CONSTITUTION:The magnetic core 1 previously subjected to chamfering is fixed by the insulating adhesive 2 to the gimbal spring 3 and thereafter, the conductive adhesive 4 is so applied on the chamfered part as to be packed therein. The chamfering size of the core 1 is preferably about t=2T/3, theta=45 deg. where the height from the gimbal spring 3 to the floating surface of the core 1 is designated as T, the chamfering height of the core 1 as t and the chamfering angle as theta by taking the balance of the assurance of the contact area with the adhesive 4 and the coating area of the adhesive 2 into consideration. The electric resistance between the magnetic core and the gimbal spring is lowered in this way, by which the fluctuations are suppressed and the deterioration in the characteristic is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head for a magnetic disk device, and more particularly to a magnetic head formed by bonding a gimbal spring and a magnetic core.

[Conventional technology]

Conventionally, this type of magnetic head generally uses an insulating adhesive 2, mainly an epoxy adhesive, to fix a gimbal spring 3 and a magnetic core 1, as shown in FIG. It was constructed by filling a conductive adhesive 4 so as to connect the side surface of the core 1 and the tip of the gimbal spring 3 in a fillet shape.

[Problem to be solved by the invention]

In the above-mentioned conventional magnetic head, the area where the conductive adhesive is applied and its volume are limited to a small size, so the electrical resistance after curing is large and the variation is large. This method has the disadvantage that characteristic deterioration due to minute noise accompanying this cannot be prevented.

[Means to solve the problem]

The present invention provides a magnetic head in which a gimbal spring and a magnetic core are fixed to each other with an adhesive. It is characterized by being filled.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIGS. 1(a) and 1(b) are a plan view and an enlarged sectional view showing an embodiment of the present invention, respectively. The magnetic core 1, which has been chamfered in advance, is fixed to the gimbal spring 3 with an insulating adhesive 2, and then a conductive adhesive 4 is applied so as to fill the chamfered portion.

Here, the size of the chamfer of the magnetic core 1 is the size of the chamfer of the conductive adhesive 4.
From the gimbal spring 3 to the magnetic core 1, considering the balance between securing the contact area with the
The height to the levitation surface is T1 The chamfer height of magnetic core 1 is T
And when the chamfer angle is θ, t=2T/3. θ
= about 45° is preferable.

In this embodiment, the gimbal spring 3 of the magnetic core 1
Although the chamfered portion is provided at the portion located on the tip side, it is also possible to provide it on the opposite side, and it goes without saying that it can be provided on both sides.

〔Effect of the invention〕

As explained above, the present invention provides a chamfered portion on the edge of the adhesive surface of the magnetic core with the gimbal spring, and fills this portion with a conductive adhesive to increase the contact area and adhesive volume. This has the effect of lowering the electrical resistance between the core and the gimbal spring, suppressing variations, and preventing deterioration of characteristics.

[Brief explanation of drawings]

FIG. 1(a) is a plan view showing an embodiment of the present invention;
b) is an enlarged sectional view taken along the line A--A in FIG. 1(a), and FIG. 2 is an enlarged sectional view showing a conventional embodiment. DESCRIPTION OF SYMBOLS 1... Magnetic core, 2... Insulating adhesive, 3... Gimbal spring, 4... Conductive adhesive, 5... Suspension assembly, 6... Lead wire.

Claims (1)

[Claims] In a magnetic head formed by fixing a gimbal spring and a magnetic core with an adhesive, the edge of the adhesive surface of the magnetic core has at least one chamfered portion, and the chamfered portion is filled with a conductive adhesive. A magnetic head characterized by: