SEMICONDUCTOR DEVICE

This semiconductor device comprises: a semiconductor substrate; a first groove that is provided in the semiconductor substrate, has a first width W1, and extends in a first direction; and a second groove that is provided in the semiconductor substrate in communication with the first groove, has a second width W2 different from the first width, and extends in a second direction intersecting the first direction. Either the first groove or the second groove is used for alignment. 该半导体装置包括：半导体基板；第一凹槽，设置在半导体基板中，具有第一宽度W1并在第一方向上延伸；以及第二凹槽，设置在半导体基板中，与第一凹槽连通，具有不同于第一宽度的第二宽度W2，并且在与第一方向相交的第二方向上延伸。第一凹槽和所述第二凹槽中的一个用于对准。