Supply of soft circuit paste, silver paste ink is silver powder and thermoplastic resin as the main component of a liquid-type ink, for a variety of different materials, have a strong adhesion and hiding power, conductivity and controllable very low resistance value. Keyboard circuit for the printing, membrane switch and other thermal plastic silk screen printing thick film paste. The product is very suitable for the production of notebook computer keyboard and the ordinary keyboard, and its main advantages: there is excellent adhesion on the polyester film, the inflection of very good, good wear resistance and hardness, precision lines printability, Fast curing. Uses: laptop computer keyboard, Computer keyboard, membrane switch and other flexible printed circuit products.