We use optical grade material (Al2O3 99.997%) using high purity aluminum oxide as raw material. We carry out the following production stages:

• Slicing
• Grinding
• Mechanical polishing

Our company employs advanced technology and equipment for crystal slicing:

-- Wire-sawing for sapphire window slicing

-- Sawing for optical parts and watch glass blanks slicing

Both techniques allow Chonghong to choose the most effective method for each application. Fully automatic wire saws enable us to cut sapphire substrates very precisely according to customers' specification.

--Grinding
Our company offers precise grinding and lapping and has developed a proprietary process to achieve minimal material stress and higher yield for final processor. We are capable to achieve perfect flatness and total thickness variation and specialize in tight tolerances.

--Polishing

Chonghong microwork offer high quality, high precision optical polishing of sapphire products, used in a variety of industries.

Major devices we are using, please take a look of the picture