JP2924458B2 - Lead weld joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welded joint of a lead of, for example, a device equipped with a semiconductor, and more particularly to a shape of a contact portion of the welded joint.

[0002]

2. Description of the Related Art FIG. 5 is a diagram showing the configuration of a conventional welded joint portion of three leads arranged in parallel. FIG. 5A is a front view, a plan view, and a side view, and FIG. In the figure, reference numeral 1 denotes an end of a lead used for connection, and a projection 1b partially projecting from a welding interface 1a on the surface is provided. 2 is the other lead connected to the end 1 of the lead
And is installed so as to correspond to the welding interface 1a.

FIG. 6 shows an end 1 of a lead and an end of the other lead.
The welding of the part 2 is being performed, and the welding electrode 3a
And the welding receiving electrode 3b, the end 1 of the lead and the other
In the vicinity of the projection 1b of the end 2 of the lead , the welding electrode 3a is pressed against the end 2 of the other lead and current is applied to the welding electrode 3a to the welding receiving electrode 3b while applying pressure. ing
The end 2 of the other lead is melted and fused. The lower part of the fusion is called nugget 4. This state is shown in FIG. At this time, the other end 2 of the lead and the end 1 of the lead may be scattered around. This is referred to as a spatter 5 here. It often occurs when welding conditions are inappropriate, but may occur at a low rate in some cases where welding conditions are appropriate. Normally, the end 1 of the lead and the other lead
It splatters from the interface of end 2 in all directions.
Since the end 2 of the other lead is pressurized by the welding electrode 3a, the spatter 5 often remains in a state in which a thread-like material protrudes from the interface while being sandwiched between them.

[0004]

Since the conventional welded joint portion of the lead is constructed as described above, if there is an object which is to be electrically isolated adjacent to the direction in which spatters project, The contact may cause an electrical short circuit, and it is necessary to check for the presence or absence of spatter after welding. In the case of missing check, there is a problem that a defect is caused and the reliability is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and prevents the occurrence of defects in an electric circuit by preventing the scattering of spatters, thereby reducing the load for confirming the electric circuit and improving reliability. An object of the present invention is to obtain a welded joint portion of a lead that improves the performance.

[0006]

SUMMARY OF THE INVENTION A welded joint of a lead according to the present invention is provided at a welding interface formed by ends of a plurality of leads which are adjacently arranged in parallel and fixedly arranged in a circuit, and is provided with an end of the other lead. /> Are brought into contact with each other and joined by electric resistance welding, and provided with an edge formed at the end of the lead or the end of the other lead along the parallel direction end so as to close the welding interface. is there.

[0007]

In the lead joint of the present invention, the end of the lead or the edge of the end of the other lead prevents spatter and prevents the spatter from scattering from the weld interface to the outside.

[0008]

[Embodiment 1] Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of a welded joint portion of a lead according to a first embodiment of the present invention arranged in, for example, three parallel arrangements. FIG. 1A shows a front, plan, and side view, and FIG. In the figure, the end 1 of the lead is the same as the conventional one , and the description thereof is omitted. 6 is the other lead connected to the end 1 of the lead.
Ends of adjacent directions are arranged in parallel at the end of the de is are installed so as to correspond to the end portion 1 of the lead will form an edge 6a bent.

FIG. 2 shows the end 1 of the lead and the end of the other lead.
The welding of the part 6 is being performed, and the welding electrode 3a
And the welding receiving electrode 3b, the end 1 of the lead and the other
The current is passed through the welding electrode 3a to the welding receiving electrode 3b while pressing the welding electrode 3a against the connecting portion 6 of the connection lead while pressing the vicinity of the projection 1b of the end 6 of the lead, and the welding electrode 3a is brought into contact with the projection 1b. Is
The end 6 of the other lead is melted and fused. This state is shown in FIG. The end of the other lead melted here
Although parts of 6 and the lead end portion 1 is to scatter outside the weld interface by the sputtering 7 next thread, the other lead ends 6
Is prevented from being scattered.

Embodiment 2 FIG. And shatterproof to weld interface outside the sputtering 7 is provided an edge portion 6a which is bent at an end portion 6 of the first embodiment in the other lead, but the other lead end 8 of the lead as shown in FIG. 4
The same effect can be obtained even if the processing is performed so that the contact surface with the end 2 enters, and the edge 8a that prevents the spatter 7 from scattering is formed.

[0011]

As described above, according to the present invention, the ends of the other leads are brought into contact with the welding interfaces formed by the ends of the plurality of leads which are adjacently arranged in parallel and fixedly arranged in the circuit, and the electric resistance of each of the leads is increased. Joined by welding, the end of the lead or
The edge of the other lead is provided with an edge formed so as to close the welding interface along the parallel direction end, so that scattering of spatter during welding is prevented, and the occurrence of defects on the circuit due to spatter can be prevented. There is an effect that a welded joint can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a welded joint portion of a lead according to a first embodiment of the present invention, wherein A is a front, plan, and side view, and B is a perspective view.

FIG. 2A is a side view showing a state in which welding is performed at the welded joint of Example 1, and FIG.

FIG. 3 is a diagram illustrating a state after welding of a welded joint in Example 1.

FIG. 4 is an explanatory view showing a state before welding at A and a state after welding at B at the welded joint portion of the lead according to the second embodiment of the present invention.

FIG. 5 is a view showing a configuration of a conventional welded joint portion of a lead, in which A is a front, plan, and side view, and B is a perspective view.

6A is a side view showing a state in which welding is being performed at the welded joint in FIG. 5, and FIG.

FIG. 7 is a diagram illustrating a state after welding of a welded joint in FIG. 6;

[Explanation of symbols]

End of the first lead, 1a weld interface, 1b projection, 3a welding electrodes, 3b welding receiving electrode, 6 other
End of the lead , 6a edge, 7 spatter (welding dust), 8 end of the lead, 8a edge.

Claims (1)

(57) [Claims] An end of the other lead is brought into contact with a welding interface formed by ends of a plurality of leads which are arranged adjacently in parallel and fixed to a circuit, and are connected by electric resistance welding. A welded joint for a lead, wherein an edge formed along the parallel direction end to close the welding interface is provided at an end of the lead or an end of the other lead .