Circuit board having a switch and method for fabricating the same

Abstract

A circuit board having a switch includes an insulation material layer, first and second insulation layers, a circular channel, a first cover layer, an inert liquid material, a first conductive block, a second conductive block and a conductive layer. The first and second insulation layers are respectively on bottom and top surfaces of the insulation material layer. The circular channel is in the first and second insulation layers and the insulation material layer, and includes a first sub-channel, a second sub-channel, a first connection channel and a second connection channel. The first cover layer is on a bottom surface of the first insulation layer. The inert liquid material is in the circular channel. The first conductive block is in the first sub-channel. The second conductive block is in the second sub-channel. The conductive layer is in the insulation material layer and adjacent to the circular channel.