G+G technology is a type of touch screen technology. Specifically, the G+G capacitive touch screen is composed of a sensor glass layer and an upper cover plate, where "G" stands for Glass. In this technology, the bottom layer of the touch screen is a touch-sensitive glass, and the upper cover plate is also made of glass material, usually tempered glass. This structure of the capacitive touch screen offers advantages such as hardness, wear resistance, corrosion resistance, high light transmittance, smooth handling feel, and high reliability. High-end devices in the market, such as Apple's iPhone, iPad, and some high-end Android tablets, often adopt this G+G structured capacitive touch screen.
Compared to other structures of capacitive touch screens, such as the G+P (sensor glass + PET plastic cover plate) structure, the G+G capacitive touch screen offers higher durability and a more exceptional tactile experience. However, due to its advanced manufacturing process and material selection, the cost is also relatively high.
Overall, G+G technology provides excellent performance and user experience for touch screen devices, making it a common touch screen solution in high-end devices.