Patent ID: 8395159

Claim:
An LED unit including a circuit board and a plurality of semiconductor chips bonded thereon, each of the semiconductor chips comprising: a semiconductor substrate having a substantially planarized surface, having an integrated circuit formed therein, and having a terminal electrically connected to the integrated circuit; a plurality of thin semiconductor films each including at least one light emitting element, the thin semiconductor films being disposed on the substantially planarized surface of the semiconductor substrate, under surfaces of the thin semiconductor films facing the semiconductor substrate being closely bonded to the substantially planarized surface of the semiconductor substrate, the thin semiconductor films being less than about 10 μm thick, and forming a step with the semiconductor substrate; and a plurality of individual interconnecting lines formed as thin conductive films, each of which extends from an upper surface of the light emitting element in the thin semiconductor film, along a top surface of the thin semiconductor film to an edge thereof, across a rise of the step, and to the terminal on the semiconductor substrate and electrically connects the light emitting element to the terminal; the circuit board having a wiring pattern and electrode pads for supplying power and a control signal to the semiconductor chips, the semiconductor chips being electrically connected to the electrode pads of the circuit board respectively, and the integrated circuit having a plurality of driving circuits that drives the light emitting elements of the semiconductor thin films, respectively.