Special swing multi wire cutting machine for sapphire and other ultra hard and brittle materials

      LED is a solid-state cold light source that emits light from PN nodes. Under the action of an electric field, free electrons and holes recombine to produce photons, making it widely used. Energy saving is a characteristic of LED, with LED light sources saving 80% more electricity than incandescent lamps and 50% more electricity than fluorescent lamps. According to data, lighting consumption accounts for about 20% of the total electricity consumption. From the situation in China, lighting electricity accounts for about 12% of the total electricity consumption. According to the National Bureau of Statistics, China's total power generation in 2010 was 4141 billion kWh, and lighting electricity consumption was 496.92 billion kWh. If the whole country were to replace LED light sources, calculated based on saving half of the lighting electricity consumption, it would be 248.46 billion kWh, which is equivalent to the total power generation of 2.9 Three Gorges water conservancy hubs last year (the total power generation of the Three Gorges Dam in 2010 was 84.37 billion kWh). Energy saving in lighting directly manifests as a reduction in energy consumption, accompanied by a decrease in carbon dioxide emissions. Popularizing LED lighting is an important way to achieve this goal.

      At the same time, LED has a lifespan 20-30 times longer than incandescent lamps and 10 times longer than fluorescent lamps. It does not contain harmful substances such as mercury and lead, uses low-voltage power supply, is convenient for solar cell power supply, and can withstand high-intensity mechanical shock and vibration. It is known as the third revolution of human lighting. LED is the form of a lamp, and truly green lighting - pollution-free and energy-saving LED light sources will eventually become the protagonist of lighting sources.

      The LED lighting industry chain consists of five links, namely substrate material preparation (sapphire, silicon carbide crystal rod), substrate material cutting and polishing, epitaxy, LED chip manufacturing, packaging and application.

      The swing multi wire cutting machine for ultra hard and brittle materials such as sapphire is a specialized equipment for slicing substrate materials in the semiconductor lighting industry.  

     The quality of LED substrate material slicing will directly affect the subsequent processing steps of LED. Traditional multi wire cutting machines cut materials such as crystals and silicon wafers with a Mohs hardness of around 5 (diamond has a Mohs hardness of 10). LED substrate materials mainly use sapphire and silicon carbide, both of which have Mohs hardness above 9. Traditional multi wire cutting machines have low cutting efficiency and even cannot cut, requiring the use of specialized swing multi wire cutting machines.

      At present, European, American, and Japanese companies have mastered the core technology of the upstream LED industry. The development of China's LED industry is mostly concentrated at the end of the industry chain with low technological level. The swing multi wire cutting machine technology for ultra hard and brittle materials such as sapphire is monopolized by Japanese and Swiss companies, becoming a bottleneck for the development of China's LED industry.

Therefore, the development of specialized swing multi wire cutting machines for ultra hard and brittle materials such as sapphire with independent intellectual property rights is of great significance in breaking foreign monopolies, reducing costs, and promoting the development of the domestic LED industry.