A triphenylene derivative of general formula or general formula which can be used as a component of liquid crystal medium and the use thereof are provided in the present invention. The medium is made by applying an ink using a Meyer Rod which has varying cell lengths along its length. In use, glaze is used to at least partially coat the food intermediate. Consequently, a semiconductor device with good heat radiation properties and good insulation breakdown voltages can be obtained. The inhibiting layer includes a nitride compound, an oxynitride compound, and an oxide compound.