Electronic-grade phosphoric acid is a key wet electronic chemical in semiconductor display manufacturing, which is mainly used for TFT array gate etching in aluminum electrode patterning etching and molybdenum/copper composite electrode treatment, molybdenum etching stop treatment and copper wiring surface treatment, as well as soda-lime glass surface activation in glass substrate processing. This product has the advantages of ultra-high purity, low particulate matter, controllable concentration and high precision, which can meet a variety of packaging requirements of customers.