In Japan, Miyamoto Yoshinosuke used spraying method and her graduate studies wiring method, blowing wiring method (Patent No. 119384) and got successful patent applications. In the two methods, the Paul Eisler’s and the printed circuit board are most similar, this kind of practice is called subtracting, is the need to remove the metal. While Charles Ducas, Miyamoto Yoshinosuke's approach is only to add the required wiring, known as additive. Even so, but because the electronic parts of the heat, the substrate is difficult to use, so that there is no formal practical work, but also Printed Circuit Board technology will go further. And they are both senior of our Printed Circuit Board Supplier.