Patent ID: 9455245
Filing Date: 2016-09-27
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a base member having a front surface; a wall portion provided on the front surface, including a first inner wall surface and a second inner wall surface, the first inner wall surface and the second inner wall surface being faced with each other on the front surface; a first semiconductor chip provided on the front surface between the first inner wall surface and the second inner wall surface, having first long sides being parallel with each other; a second semiconductor chip provided on the front surface between the first inner wall surface and the second inner wall surface, having second long sides being parallel with each other, and the second semiconductor chip provided adjacent to the first semiconductor chip so that one of the first long sides and one of the second long sides are faced with each other; and a third semiconductor chip provided on the front surface between the first inner wall surface and the second inner wall surface, having third long sides being parallel with each other, and the third semiconductor chip provided adjacent to the second semiconductor chip so that the second semiconductor chip being provided between the first semiconductor chip and the third semiconductor chip in the planar view, and one of the third long sides and one of the second long sides being faced with each other, wherein the first semiconductor chip is provided diagonally with respect to a first imaginary line in a planar view of the front surface, the first imaginary line is in parallel to the first inner wall surface in the planar view, the second semiconductor chip is provided diagonally with respect to the first imaginary line, and the second semiconductor chip is inclined to the same side as the first semiconductor chip in the planar view, the first semiconductor chip includes a first short side connecting the first long sides, the second semiconductor chip includes a second short side connecting the second long sides, the third semiconductor chip includes a third short side connecting the third long sides, the first short side, the second short side, and the third short side face in the same direction and are parallel with each other, a part of the first semiconductor chip protrudes from a second imaginary line which is an extended line of the second short side in the planar view, and a part of the second semiconductor chip protrudes from a third imaginary line which is an extended line of the third short side in the planar view.