*2.1.8 Through plating hole*

Although it is not a machine but a process, this technique is included in this section to exemplify this manufacturing process, which consists of a set of chemicals that can metallize holes without any machine but a vacuum bed and a reflow oven. There are

**Figure 5.** *Soldering plate.*

many commercial solutions in the market, and the results are good enough. The vacuum bed makes this dense liquid metal to cross along the wholes, and then, it must be treated with the reflow oven. Laser and milling machines usually include this vacuum bed in their systems. **Figure 8** shows an example of through plated holes.

*Manufacturing Methods Based on Planar Circuits DOI: http://dx.doi.org/10.5772/intechopen.109114*

**Figure 7.** *Galvanic metallizer.*

**Figure 8.** *Through plated holes*.
