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Applications Example

High quality sapphire processing

This is an introduction to a high quality processing method for sapphire, which is used as a substrate for LEDs and other applications.

Processing Example
With dry polishing (DP), it is possible to obtain a high quality result with surface roughness under 10 nm. An example is shown below. DISCO will help select the optimal processing parameters for your desired applications.
  Typical grinding process With DP
Ra 17nm

Ra 6nm
Outer edge
Ra 29nm

Ra 10nm
Table 1: Surface roughness comparison
Surface after typical grinding process Surface after processing with DP
Figure 1: Processed surface condition

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