Aluminum Oxide: The Invisible Tool Transforming Precision Manufacturing

In the realm of precision manufacturing, aluminum oxide has evolved from a simple filler material to an "invisible tool" that plays a crucial role in determining machining accuracy and yield rates. As the demand for surface roughness (Ra) in semiconductor wafers, optical glass,and high-end ceramic substratesapproaches atomic levels, traditional abrasives have reached their physical limits. Recent industry trends indicate that various specialized forms of aluminum oxide powder, including "flaky" and "high-purity, narrowly-distributed, spherical-shaped" fine aluminum oxide, are becoming indispensable core materials in cutting, polishing, and surface treatment processes.

Polishing Scene: The Nano-Level "Chemical-Mechanical" Synergy

In ultra-precision polishing within the 3C accessory, optical component, and semiconductor industries, Chemical Mechanical Polishing (CMP) has become the mainstream method, with aluminum oxide serving as one of the mainstay abrasives in CMP. By controlling various morphologies of aluminum oxide powder and adjusting particle size distributions in combination with different formulations, it is possible to create polishing slurries tailored for the entire range of processes from grinding to polishing, including initial, intermediate, and final polishing stages.

Taking sapphire substrate polishing as an example, the most commonly used abrasives in the market today are silicon dioxide and aluminum oxide polishing slurries. Each type of slurry is suited for polishing different crystal forms of sapphire, with aluminum oxide boasting a Mohs hardness of 9, often providing superior polishing efficiency. Our alkaline polishing products, which focus on silicon dioxide and aluminum oxide as core abrasives, are widely used in the sapphire polishing sector for LED substrates, consumer electronic windows, and optical lens plates.

In addition to sapphire polishing, resin materials are also compatible substrates for aluminum oxide polishing, such as resin lenses. The Mohs hardness of resin lens substrates is approximately 4-5; some soft resins can dip as low as 2-3 before hardening. After undergoing hard coating treatments, surface hardness can be elevated to nearly 6-7 (not accounting for the inherent hardness of the substrate material). Given the physical and chemical characteristics of resin materials, aluminum oxide abrasives emerge as an ideal choice.

Moreover, in the field of precision metal processing, our "sub-micron high-purity aluminum oxide" excels in ultra-precision polishing of aluminum alloys, stainless steels, and hard alloys, thanks to its suitable particle size distribution and efficient crystal morphology, achieving excellent mirror-like finishes.

Additionally, our aluminum oxide polishing products consistently pass international standard tests, such as RoHSand Halogentests, every year, ensuring the safety of electrochemical products.