- Taiwan Metal Center ASTM Salt Spray Test Certification

- Cooperating with Japanese technology, CHT products (B1~B2) have a rust-proof capability of 6~9, which is higher than the products of general companies (B3)
- B2 is a high rust-proof frame specially developed for LED clean room requirements.
- Taiwan Metal Center Surface Roughness Certification

- CHT is the only company that uses fully automatic polishing production technology. The surface roughness of its products (1~2) is Ra0.03~0.05um, which is better than the manually polished products of general companies.
- The better the surface roughness, the less likely the frame will rust, and the quality of the blue film will be better, reducing the generation of bubbles.
- Flatness detection and adjustment (compliant with SEMI G74-0699)

Confirm that the flatness of the Film Frame is within 0.3mm
- Load test (compliant with SEMI G74-0699)
Load a 30N weight on the front of the Film Frame to deform it and keep it there for 60 seconds. Then remove the weight and confirm that the Film Frame is not deformed.
- Highest quality iron ring supplier

- The most professional Cassette supplier
