The Single Wire Mode
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7) The Single Wire Mode
A wire defines a joint made by friction welding, which has a welding point at the beginning and at the end and where
the welding points are connected by an arc of wire. This wire arc thus creates an electrically conductive connection
between the two welding points.
Several individual steps are usually required to bond a wire.
Figure 7.0. - 1
Single Wire Illustration
Pre-Operation .
With the Type XX10 head, a ball is flamed at the end of the wire before the first bond.
With the head Type XX30, a wire feed is performed at this point.
Bond sequence.
Then the XY position of the 1st bond point is approached, and the Z axis moves the bond head downwards until the
bond tool is detected to be placed on the surface to be bonded. The welding process then begins, creating an inter-
metallic bond between the wire and the surface of the substrate.
Loop.
Subsequently, the bond head is moved to the next bond point in a previously defined sequence. This movement crea-
tes and forms the so-called loop.
Chain.
A loop and the welding point at the end of the loop form a chain.
After the 1st bond 0, 1 or more chains can follow.
Termination.
At the end of each bond sequence the termination is performed.
The termination defines the disconnection and thus the termination of a wire connection. At the same time, the wire
for the following bond connection is prepared during termination for the bond head types 5X10, 5X30, 5X32 and
5X50.
Safe bump / Stitch on Ball.
(= Stand-Off-Stitch Bond, =SSB, =BSOB)
In XX10, the security bonds (Stitch on ball and Safe bump) also belong to the wire to which they have a physical
connection.
In the <Single Wire> mode, each bond has an XY position and a separate Z height. In addition, each bond has an indi-
vidually stored camera and light setting.