Patent ID: 7994890

Claim:
An insulating transformer, comprising: a semiconductor substrate; an insulating substrate which overlies only a portion of the semiconductor substrate so that the semiconductor substrate extends laterally beyond the insulating substrate; a primary winding provided on one of the semiconductor substrate and the insulating substrate; a secondary winding provided on the other of the semiconductor substrate and the insulating substrate, the primary winding and the secondary winding being arranged to face each other; an electrode pattern disposed on a portion of the semiconductor substrate extending laterally from the insulating substrate, the electrode pattern being connected to the primary winding or the secondary winding formed on the semiconductor substrate; and an insulating spacer layer provided in between the semiconductor substrate and the insulating substrate for insulating and separating the primary winding and the secondary winding, the insulating spacer layer being non-perforate and free of electrical conductors passing therethrough and maintaining a constant interval between the semiconductor substrate and the insulating substrate.