A method includes an act of providing a crystalline substrate with a diamond-type lattice and an exposed substantially -surface. In one example, the vacuum source is at least partially within an engine air intake system. The row direction and the first virtual linear lines L1 define an angle of 2-40 degrees, and the dummy wiring layers 32 are disposed in a manner to be located on the first virtual linear lines L1. The current sensing MOS transistors are capable of making flow reduced currents proportional to the currents of the output MOS transistors. If desired, the front and rear faces of all of the blades can collectively be reversed thereby extending the life of each blade. The presentation of the view of the 3D scene is performed concurrently with presenting the 3D scene.