Realization of high-precision micro-groove forming with roll molds for optical films
[Issues in microfabrication of precision molds]
Video devices such as TVs and displays are becoming higher resolution types, such as "4K8K", and having smaller and more complex structures such as xR (VR/AR/MR, etc.) goggles. In order to achieve these technologies, finer machining of precision molds for optical films and optical elements is required.[Solution with monocrystalline diamond fine cutting tools]
The use of fine cutting tools with mono-crystal diamond enables high-precision fine groove forming with continuous pitch in the machining of roll molds for optical films. Mono-crystal diamond has excellent wear resistance and contributes to the long-time continuous machining of large rolls.
Example of mono-crystal diamond ultrafine cutting tool edge shape
Example of nano-R fine cutting tool (under development)
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Expected effects for optical parts mold are contributing smoother release ability, improvement of surface texture, and suppression of rainbow reflection.
Supposed production range: R100nm ～ under R800nm
Optimal cutting tools for fine machining
Mono-crystal diamond ultrafine cutting tool
These mono-crystal diamond bites have fine cutting edges made of single-crystal diamonds, which have excellent wear resistance and can make the edges very sharp. By using single-crystal diamond microbites, a cutting edge controlled in micrometers (μm) is transferred to a workpiece, and a fine groove pattern can be formed with high precision and a continuous pitch.
[Main applications]
Machining of optical films for FPDs and precision molds for optical elements
Micro-pattern forming and planer machining
Machining of diffraction gratings
Other MEMS and bio-related micro-pattern machining
Standard Specification [Nose angle under 15°] [Size: mm]
