High Flatness Polishing Processing

We have a proven track record in mass-production of sapphire wafer for LED, and possess the technology for micro processing and room temperature bonding of sapphire.
Room temperature bonding, in particular, requires materials to be polished to a high degree of flatness in order to bond at room temperature. Our high flatness polishing technology is the unique capability to enable room temperature bonding.

Surface accuracy, which represents flatness, expresses the vertical interval between the highest and lowest points on a substrate, as shown in the figure.
Transparent material with a smaller vertical interval has advantages such as allowing light to penetrate more uniformly or for different materials to be pasted together while maintained the flatness.
By replacing the transparent material with sapphire, one can harness the features of sapphire, such as endurance under high temperature, high thermal conductivity, scratch/crack prevention, and high durability.

In addition, when bonding different types of material on a highly flat sapphire base and processing those bonded materials for flatness and degree of thickness, sapphire can demonstrate high performance as the supporting substrate and as a highly flat base for polishing.
Furthermore, unlike ceramics, sapphire is a transparent material, so the affixed side of bonded materials is visible and it can be used for visualization experiments.

In addition to sapphire, we also perform high precision polishing on various other materials by customer request, so please do not hesitate to consult us.

Materials Sapphire, Ti sapphire, and other materials
Polish system Single sided polish and double sided polish
High flatness polishing on round and square substrates λ~λ/20, etc.
We consider according to material, size, and shape.
Cleaning Optical grade and epi grade
Inspection and evaluation Interferometer / Zygo and other

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