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The use of aluminum ribbon for power device bonding has gained in popularity as an alternative to multiple heavy wire bonds. Its advantages include improved electrical characteristics and throughput, improved heat dissipation, and increased reliability.
One of the most notable uses of the ribbon is to substitute the need for many small, parallel wires. This allows for a higher throughput and a higher cross section.
Another notable use of the ribbon is in solar energy. This is thanks to the metal’s ability to form a thin oxide layer that protects it from corrosion.
As a result, it is often used to clad the exterior of window frames and appliances. A variety of different alloys and shapes are available for this purpose.
One of the more important benefits of ribbon bonding is that it has a lower loop height than a comparable multi-wire bonding solution. This lower loop height translates to smaller package dimensions. Also, the bonded ribbon will be more resilient to damage than the parallel wires.
A similar effect can be achieved with multiple wire bonding, but it requires a more complex process. Therefore, it’s a good idea to consider ribbon bonding as an option.
In addition to allowing for better connections, ribbon bonding also allows for values that are closer to the clip process. With that said, a robust bonding process is imperative for high-volume production.
Fortunately, major bonder manufacturers offer conversion kits for these processes. However, most people won’t need to go that far.
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