It is something regarding the liquid crystal growth unit which this invention has, melted ones (13) the resistant heater and the crucible which are heated (11) the electric field coil which makes the alternating field cause in inside (the conductor) with usually, turns on electricity electric current to melted ones with that. According to this invention, the resistant heater it is installed as the magnetic field coil, when you rephrase, it is formed by the hollow circular cylinder body (1), among those it is helical and the single more current path it is formed by the marginal slot (2). This invention is used the electric current which is necessary in order to heat unit, also in order to generate the portable magnetic field. Because of that, the separated electric field coil or the separated electric power supply section for the magnetic field is necessary. Even like the electric field coil which is installed as the coil component the resistant heater which operates is hot resistance, the thermal core, namely the melted territory of unit is surrounded directly. Therefore although the magnetic field is generated, necessary size becomes smallest. As for the magnetic field exceeding the outside plate wall of grain growth unit, as for spreading it is not, it can install the aforementioned outside plate wall as the usual iron outside plate.
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