Key Takeaways

• TANAKA PRECIOUS METAL TECHNOLOGIES has developed a new gold bump transfer technology called AuRoFUSE™ Preforms, allowing for improved semiconductor chip application.
• This technology enables the transfer of gold bumps to chips with complex structures, enhancing miniaturization and integration in semiconductor designs.
• AuRoFUSE™ Preforms offer great reliability and performance, addressing challenges presented by traditional solder and plating methods in semiconductor manufacturing.

Innovative Gold Bump Technology for Semiconductors

TANAKA PRECIOUS METAL TECHNOLOGIES has introduced an advanced gold bump transfer technology named AuRoFUSE™ Preforms, aimed at enhancing the performance of semiconductor chips. This innovative approach enables gold bumps to be effectively applied on semiconductor substrates, even those with intricate geometries.

The process begins by forming gold bumps on a transfer substrate, followed by their secure transfer onto the target semiconductor chip. Openings created in the silicon substrate allow for gold bumps to fit snugly, reducing the risk of dropping during transfer. A heat treatment stage shrinks the bump to create a slight gap, facilitating vertical extraction without damaging the semiconductor substrate.

Historically, semiconductor manufacturing faced challenges with traditional gold bump formation, particularly when dealing with complex shapes that involve protrusions or indentations. Unlike previous methods that directly applied bumps to chips, the new transfer technology allows for separate production of gold bumps, making it suitable for various shapes and sizes. This is particularly beneficial for semiconductor chips that are sensitive to processing methods like photolithography.

The AuRoFUSE™ bonding process utilizes a paste that contains gold particles and an organic solvent. Through a combination of thermocompression at manageable temperatures and pressures, it showcases an impressive bonding strength while minimizing horizontal deformation. The primary advantage of AuRoFUSE™ is its ability to support miniaturization of wiring and increased chip integration density, meeting the evolving demands in industries such as consumer electronics and automotive applications.

Compared to conventional methods like soldering or plating, AuRoFUSE™ Preforms significantly reduce risks associated with short-circuiting due to solder spreading and potential chip damage from high-pressure bonding techniques. This advancements position AuRoFUSE™ as a critical solution for next-generation devices that require high-density mounting and effective photonics-electronics integration.

In terms of performance, gold is noted for its excellent thermal conductivity and low electrical resistance, qualities that make it highly effective for power semiconductors which need efficient heat dissipation. It also exhibits high resistance to oxidation and corrosion, ensuring a long-lasting reliable performance once mounted.

TANAKA’s extensive expertise in precious metals has been integral to the development of AuRoFUSE™ Preforms, contributing to ongoing advances in semiconductor technology. With a robust development system encompassing sourcing, manufacturing, and recycling, TANAKA continues to promote sustainable practices within the precious metals industry, further supporting the evolution of semiconductor technologies.

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