Patent ID: 8536670

Claim:
A semiconductor device comprising: a first semiconductor chip; and a second semiconductor chip that is stacked on the first semiconductor chip, wherein, the first semiconductor chip includes a first semiconductor substrate on which is stacked a first insulating layer with a first wiring portion therein of which first wiring portion a side surface is exposed at a side portion of the first semiconductor chip, the second semiconductor chip includes a second semiconductor substrate on which is stacked a second insulating layer with a second wiring portion therein of which second wiring portion a side surface is exposed at a side portion of the second semiconductor chip, the first and second insulating layers are opposed to each other, and opposed surfaces of the first semiconductor chip and the second semiconductor chip are bonded to each other; the respective side surfaces of the first wiring portion and the second wiring portion, which are exposed at the side portions of the first semiconductor chip and the second semiconductor chip, are covered by a conductive layer, and the first wiring portion and the second wiring portion are electrically connected to each other through the conductive layer, and the first semiconductor substrate is thinner than the second semiconductor substrate.