Patent ID: 6720662
Filing Date: 2004-04-13
Classification: H01L

Abstract:
A semiconductor device comprising:a first semiconductor chip; a second semiconductor chip bonded onto the first semiconductor chip in stacked relation; a noise shield film provided between the first semiconductor chip and the second semiconductor chip for preventing the first and second semiconductor chips from being mutually influenced by noises thereof, a connection mechanism which connects the noise shield film to a power supply portion, and a lead frame, wherein the first semiconductor chip is greater in size than the second semiconductor chip, and the noise shield film is provided on a surface of at least the first semiconductor chip, wherein a major noise source is present in the second semiconductor chip, wherein the noise shield film includes a shield portion which covers an area in which the major noise source is present, and an extension portion extending outwardly from the shield portion on a surface of the first semiconductor chip and beyond an edge of the second semiconductor chip, wherein the connection mechanism includes a bonding wire which directly connects the noise shield film to a portion of the lead frame which has a supply potential or a ground potential.