Patent ID: 8193453

Claim:
A printed wiring board comprising: a substrate comprising a pair of edges and a fixing hole provided near the pair of edges; a land provided around the fixing hole at a first area excluding a second area between an edge of the substrate and the fixing hole, the land comprising an area extending from near the fixing hole toward a central portion of the substrate between directions toward which the pair of edges extends, and the land further comprising an edge that extends in a direction in parallel with an edge of the substrate; and a height adjusting portion comprising insulating property and a height substantially the same with that of the land and being positioned between the fixing hole and the pair of edges, the height adjusting portion abutting a head portion of a bolt at a position different from the land when the bolt is screwed through the fixing portion, wherein the land is shaped as a portion of an annular ring centered around the fixing hole and extending toward the central portion, wherein the radius of the inner circle of the annular ring is larger than the radius of the fixing hole, and wherein the height adjusting portion is formed on the substrate at a position within the annular ring that does not include the portion of the annular ring.