How long will the patent for photovoltaic silver paste last?

The patent period of photovoltaic silver paste is 1~2 years. The key link is the optimal design of silver paste formula. The production process is relatively simple, but the stability of the process is extremely demanding. Production technology and cost of photovoltaic silver paste: silver powder, glass powder (or resin) and organic matter are mixed, then put into mechanical equipment for mixing, stirring and grinding, control the technological parameters of stirring and grinding, filter out silver paste, product performance inspection, packaging and warehousing, etc. On the whole, photovoltaic silver paste combines the scientific knowledge of metal, inorganic immaterial and organic matter. The main product of He Ju material is positive silver paste, which is the key material for preparing metal electrodes of photovoltaic cells.