An optical system assures excellent optical performance with substantially no effect of birefringence, even when a birefringent crystal material such as fluorite is used. The sputtering mechanism has a target, an electromagnet in the shape of a solenoid disposed in horizontally facing relationship to the target, and a coaxial cylindrical permanent magnet disposed in vertically facing relationship to the target. The pattern on the reticle forms a primary die and test structures in scribelines that abut edges of the die. The outer layer is solid, but the inner layer has several needle’s tip size holes, through which water would penetrate into the inner layer space that is full of soil, and would keep the soil moist and watered at all times, thereby continuously watering the plant growing in the soil, drop by drop.