Patent ID: 7868462

Claim:
A semiconductor package comprising: a package board; a plurality of semiconductor chips sequentially stacked on the package board, each of the semiconductor chips including a semiconductor substrate and an open loop-shaped chip line formed on the semiconductor substrate, and each of the open loop-shaped chip lines having first and second end portions; a first group of connectors electrically connecting the first end portion of a topmost open loop-shaped chip line among the open loop-shaped chip lines, the second end portion of a lowest open loop-shaped chip line of the open loop-shaped chip lines, and the first and second end portions of intermediate open loop-shaped chip lines between the topmost open loop-shaped chip line and the lowest open loop-shaped chip line, thereby constituting a spiral coil together with the open loop-shaped chip lines; and, a second group of connectors electrically connected to the second end portion of the topmost open loop-shaped chip line to form an induction coil of a transformer together with the spiral coil.