OGS's leading single-chip glass touch technology solution is in the ascendant, and a new generation of touch technology-Metal Mesh (generally called metal mesh, metal network) has quietly formed. Not only Yanghua, a Taiwanese manufacturer of touch panels, but also interfaces are actively investing in the research of Metal Mesh touch technology. The Shenzhen-based company Ou Fei Guang Metal Mesh touch panel products have been officially mass-produced, and will be used in touch notebook computers initially.
Existing touch conductive materials are not suitable for large-sized screens, because the larger the screen size, the greater the amount of processing data required, and therefore the requirements for impedance values ​​are also increased. When the size is more than 14 inches, ITO Due to limited use, alternative materials such as Metal Mesh, Nano Silver, Carbon Nanotubes, and Graphene have been valued. Among them, the development of Metal Mesh and Nano Silver Wire is more mature, and it is also the most promising alternative material for mass production.
Metal Mesh has excellent conductive properties and can achieve on-cell single-layer multi-point large-scale breakthroughs. Metal Mesh touch technology is considered to have the opportunity to become one of the mainstream touch technologies for large-scale applications. In the market, the topic of transparent conductive film (TCF) replacing ITO has been hot recently. At present, ITO replacement materials are nano silver wire (Ag NW) and Metal Mesh as the closest commercial solutions. If you can use Metal-mesh (metal network) to replace the traditional ITO conductive layer, you can make the resistance lower and the conductive layer thinner. Metal-mesh technology is expected to further strengthen the cost-effectiveness of Film touch screen.
Earlier, thin film touch panels were considered to have more noise interference problems when used in large-size products, but in order not to be excluded from the trend of large-size touch applications, thin film touch panel manufacturers are actively looking for a new generation of solutions , And found Metal Mesh. Metal Mesh is a new conductive material, touch sensor technology, used to replace the traditional ITO film.
Because thin-film touch technology is very mature and cost-effective in small-size applications, Metal Mesh has been set by suppliers to focus on the 11.6-inch and large-size application markets, including notebooks, due to its technical characteristics. Computers, All in One integrated computers and other products, a few will be used in tablet computers.
Limiting factor
In the metal mesh process, silver bromide coating is first applied on the film, followed by yellow light process exposure, silver washing and other procedures, and finally the silver metal mesh is obtained. Recently, manufacturers have invested in Roll to Roll roll-to-roll process development. Roll to Roll production of Metal Mesh will face the problem of wire breakage during the production process (especially at the silver wash stage). The scattered position of wire breakage will greatly reduce the yield of finished products.
The current problem is that the yield of Metal Mesh is unstable, the second is that there are few companies capable of mass production of Metal Mesh touch panels, and the third is that the cost will increase when using the Metal Mesh solution with LCD panels.
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