JPH0240882A - Soldering method - Google Patents

Abstract

PURPOSE:To prevent a break of wire by covering a magnet wire with a tube, a partial cylindrical part of which is notched, fixing and positioning the tube, along each conductor of a conductor pattern to which the magnet wire is to be soldered, in a groove provided on one side of each conductor. CONSTITUTION:A magnet wire 6 from a magnet head is covered with a protective tube 9 having a notch 8 on a part of its cylindrical unit. Next, the tube 9 is fixed and positioned, along each conductor 3 of conductor pattern to which the magnet wire 6 is to be soldered, in a groove 7 provided on one side of each of these conductors 3, then the magnet wire 6 and the conductors 3 are soldered together. In this way, the magnet wire 6 can be held without being hurt, thus a break of wire can be prevented.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a floating magnetic head, and particularly to a method for connecting a magnetic head to a flexible printed (wiring) cable (hereinafter referred to as FPC) on which an IC circuit for amplifying signals is mounted. This article relates to soldering between magnet wire (hereinafter referred to as lead wire) and FPC.

[Conventional technology]

Conventionally, the soldering method for this type of floating magnetic head is as shown in FIGS. 2(a) and 2(b).
and a conductor 3 are bonded together with an adhesive 2, and this conductor 3 is further sandwiched and protected between a flexible base material 5 and an adhesive 4, but the conductor 6 to which the lead wire from the magnetic head is soldered is a flexible base material 5. Lead wires were soldered using the FPC which was lowered by the thickness of the base material 5, and the soldered upper part was covered with a flexible coating agent.

[Problem to be solved by the invention]

In the conventional floating magnetic head soldering method described above, the conductor to which the lead wire is soldered is located at a position lowered by the thickness of the flexible base material, so the lead wire routed on the surface of the flexible base material is Since the flexible substrate is deformed by the thickness of the flexible base material before being soldered to the conductor, it is difficult to align the conductor and lead wires and to hold the lead wires when soldering them, making automation and mechanization difficult. There was a drawback. In addition, the parts of the lead wires that are soldered and heat-hardened and are susceptible to breakage are deformed by the thickness of the flexible base material, so there is a risk of wire breakage in floating magnetic heads that require reliability. There was a drawback.

An object of the present invention is to provide a half-mouthing method that solves the above-mentioned problems.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a method for soldering a magnet wire to a conductor pattern, in which the magnet wire is covered with a tube having a partially cut-out cylindrical shape, and the magnet wire of the conductor pattern is soldered to the conductor pattern. The magnet wire and the conductor pattern are soldered by fixing and positioning the tube to a hole provided on one of these conductors along each conductor to which the wire is soldered.

〔Example〕 Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIGS. 1fa) and 1b are schematic diagrams showing an embodiment of the present invention.

A flexible printed (wiring) cable (FPC) is made by bonding a flexible base material 1 and a conductor 3 with an adhesive 2,
This conductor 3 is protected by a flexible base material 5. The flexible base material 5 has a trough 7 for holding and positioning a tube 9 having a notch 8 which protects the lead wire 6 and does not interfere with soldering to the conductor of the FPC.

In the soldering method of the present invention, the magnet wire (lead wire) 6 from the magnetic head is covered with a protective tube 9 having a cylindrical part with a notch 8, and the magnet wire 6 of the conductive pattern is soldered. Along each conductor 3,
The tube 9 is inserted into the groove 7 formed on one side of these conductors 3.
By fixing and positioning, the magnet wire 6 and the conductor 3 are attached by half [fJ. The conductor pattern is a flexible Kapton film substrate.

A flexible printed cable consisting of a conductor and a coverlay film.

〔Effect of the invention〕

As explained above, the present invention provides for passing a tube having a notch that protects the lead wire and not hindering soldering to the conductor of the FPC through the lead wire, and
By having a groove for positioning and fixing the tube on the flexible base material, alignment of the conductor and lead wire, which was difficult in the past, can be easily done by inserting the tube into the groove of the flexible base material. By covering the tube inserted into the tube with a coating agent, it is possible to easily and securely hold the lead wire without damaging it, and it also prevents the tube from holding the wire against the surface tension of the solder during soldering. This makes it possible to completely insert the lead wire into the solder, which has the effect of facilitating highly reliable automation and mechanization. In addition, when the soldered, heat-hardened, break-prone part of the lead wire is applied to the conductor, it will not be deformed by the thickness of the flexible base material, so reliability is required. This has the effect of eliminating the risk of wire breakage and improving reliability in floating magnetic heads.

[Brief explanation of the drawing]

FIG. 1(a) is a front view showing the lead wire and FPC conductor soldered part of a repaired example of the present invention, and FIG. 1(b) is A of FIG. 1(a).
-A cross-sectional view, Figure 2 (a) is a front view showing the lead wire and FPC conductor soldered part used in a conventional floating type magnetic head of this type, (b) is Figure 2 (a) FIG. 2 is a sectional view taken along line A-A. 1.5...Flexible base material 2.4...Adhesive 3...Conductor 6...Lead wire (magnet wire) 7...Holding tube 1 Positioning eraser 9...Lead wire Protective tube patent applicant NEC Corporation Representative Patent attorney Nakaichi Kanno, 4
9' Steel 1 Figure 2

Claims (1)

[Claims] (1) In a method of soldering a magnet wire to a conductor pattern, the magnet wire is coated with a tube having a cylindrical shape with a part cut out, and each magnet wire of the conductor pattern is soldered to the magnet wire. A soldering method characterized in that the magnet wire and the conductor pattern are soldered by fixing and positioning the tube in a groove formed on one of the conductors along the conductor.