NOVELTY - The vaporizing device comprises a heat exchanger block (1), a heating element (2) to heat the heat exchanger block, a meander-shaped flow channel, which passes through the heat exchanger block, an inlet (3) arranged into the flow channel in the peripheral region of the heat exchanger block, and an outlet (4). The single piece heat exchanger block comprises sintered block elements made from graphite. The heating elements: comprise solid heating elements such as silicon carbide, induction heaters, infrared light, and a water heater.    USE - The device is useful for vaporizing solid and/or liquid materials useful in the manufacturing of a solar cell.    ADVANTAGE - The vaporizing device can be efficiently manufactured with long time working stability and high mechanical strength and reliability.    DETAILED DESCRIPTION - The vaporizing device comprises a heat exchanger block (1), a heating element (2) to heat the heat exchanger block, a meander-shaped flow channel, which passes through the heat exchanger block, an inlet (3) arranged into the flow channel in the peripheral region of the heat exchanger block, and an outlet (4). The single piece heat exchanger block comprises sintered block elements made from graphite. The heating elements: comprise solid heating elements such as silicon carbide, induction heaters, infrared light, and a water heater; are located inside the heat exchanger block, outside the heat exchanger block or inside and outside of the heat exchanger block; and are independently controlled and regulated. The inlets are arranged in the flow channel in different temperature zones of the heat exchanger block. The outlets are located in the flow channel in the center and different temperature zones of the heat exchanger block. The flow channel has an inner side on which a curable coating is applied and sealed.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a vaporizing device.    Heat exchanger block (1)    Heating element (2)    Inlet (3)    Outlet. (4)