Abstract: A protection device includes a semiconductor substrate including a protection element; an insulating layer covering a surface of the semiconductor substrate; a conductive layer disposed in the insulating layer, and extending in a plane that is parallel with the surface of the semiconductor substrate; a passive element formed with an elongated conductor, curved in a plane that is parallel with the conductive layer, and located over the conductive layer; and an input terminal, an output terminal, and a ground terminal exposed in a surface of the insulating layer. One end of the passive element is electrically connected to the input terminal, the other end of the passive element and a high-potential-side terminal of the protection element are electrically connected to the output terminal, and a low-potential-side terminal of the protection element and the conductive layer are electrically connected to the ground terminal.

Abstract: A semiconductor device used in a protection circuit including a thyristor and an LCR circuit which includes a coil L, a capacitor C and a resistor R, the semiconductor device may include: a semiconductor layer in which the thyristor is provided; an insulating film provided on the semiconductor layer; and a pair of electrodes provided on the insulating film and connected to a protection target circuit, wherein at least one of the coil L, the capacitor C and the resistor R is provided in the insulating film, and the at least one of the coil L, the capacitor C and the resistor R is connected to an anode of the thyristor by a first metal wire filling a first hole provided in the insulating film.

Abstract: A protection device includes: a semiconductor substrate in which a protection element; an insulating layer covering a surface of the semiconductor substrate; a conductive layer disposed in the insulating layer, and extending in a plane that is parallel with the surface of the semiconductor substrate; a passive element formed with an elongated conductor, curved in a plane that is parallel with the conductive layer, and located over the conductive layer; and an input terminal, an output terminal, and a ground terminal exposed in a surface of the insulating layer. One end of the passive element is electrically connected to the input terminal, the other end of the passive element and a high-potential-side terminal of the protective element are electrically connected to the output terminal, and a low-potential-side terminal of the protective element and the conductive layer are electrically connected to the ground terminal.

Abstract: A semiconductor device used in a protection circuit including a thyristor and an LCR circuit which includes a coil L, a capacitor C and a resistor R, the semiconductor device may include: a semiconductor layer in which the thyristor is provided; an insulating film provided on the semiconductor layer; and a pair of electrodes provided on the insulating film and connected to a protection target circuit, wherein at least one of the coil L the capacitor C and the resistor R is provided in the insulating film, and the at least one of the coil L, the capacitor C and the resistor R is connected to an anode of the thyristor by a first metal wire filling a first hole provided in the insulating film.