THE SINGLE BEST STRATEGY TO USE FOR GND ELECTRONICS

IC means the Built-in circuit. The IC is an electronic machine with built-in circuits inside of it, with a lot of legs coming out for use.Roughen the copper-clad floor on the copper-clad board with water sandpaper, and grind from the oxide layer, and afterwards rinse the copper powder made by the grinding with drinking water, and dry it.We now have