According to one embodiment, a semiconductor device includes the following structure. The semiconductor chip is provided between first and second conductors. A joint component is provided between the chip and the second conductor. The thin film is provided on the second conductor and contains a material different from a material of the joint component. The second conductor includes first, second and third plates. The first plate extends in a first direction along a first surface of the chip and is connected to the chip via the joint component. The second plate extends from the first plate obliquely with respect to the first direction. The third plate extends from the second plate in the first direction. The thin film is arranged on a surface of the second plate continuous from a surface on which the joint component is provided.

A package includes a semiconductor die disposed on a lead frame. A source contact pad is disposed on the semiconductor die. The package further includes a lead post shared by a plurality of leads that form external terminals of the package. The lead post has a clip-locking feature. A clip connects the source contact pad to the lead post. The clip has a key structure coupled to the clip-locking feature in the lead post.

A electrical connection element includes a planar mating surface adapted for mating with a metal bonding surface, a rim that forms an enclosed shape around the planar mating surface, and a plurality of outgassing grooves formed in the planar mating surface, wherein each of the outgassing grooves comprises a proximal end that is spaced apart from the rim and a distal end that intersects the rim, and wherein a cross-sectional area of each of the outgassing grooves increases along a lengthwise direction going from the proximal end to the distal end.

A metal clip disposed on chips to connect the chips to each other, includes a plurality of bonding parts each having a lower surface configured to bond to an upper surface of each of the chips; and an outer side part formed at each of the bonding parts to extend upward from at least a portion of an outer side of respective ones of the bonding parts to form a step therefrom.