Patent ID: 8507377

Claim:
A method of manufacturing a semiconductor device, comprising: forming a first interlayer insulation film above a semiconductor substrate which comprises a first edge region, an integrated circuit region surrounded by the first edge region and a second edge region located between the first edge region and a corner of the integrated circuit region; forming a contact hole in the first interlayer insulation film of the integrated circuit region, a first trench in the first interlayer insulation film of the first edge region and a second trench in the first interlayer insulation film of the second edge region; forming first metal films in the contact hole, the first trench and the second trench; forming a second interlayer insulation film above the first interlayer insulation film after forming the first metal films; forming a third trench wider than the first trench in the second interlayer insulation film of the first edge region and directly above the first trench, a fourth trench wider than the second trench in the second interlayer insulation film of the second edge region and directly above the second trench and a fifth trench in the second interlayer insulation film of the integrated circuit region and directly above the contact hole; and forming second metal films in the third trench, the fourth trench and the fifth trench, wherein the second trench bends at least one time in plan view, the first edge region comprises a main-wall part which comprises the first trench and the third trench, and the second edge region comprises a sub-wall part which comprises the second trench and the fourth trench.