Patent Number: 
Section: claims

1. An apparatus for implanting ions into a wafer, the apparatus comprising:an ion beam generator;a first deceleration unit capable of and positioned to initially decelerate the energy of an ion beam generated by the ion beam generator; and,a second deceleration unit capable of and positioned to secondarily decelerate the energy of the ion beam, after said initial deceleration, into first and second energy levels according to ion-implantable regions of the wafer. 2. The apparatus of claim 1, wherein the second deceleration unit comprises at least one deceleration electrode. 3. The apparatus of claim 1 further comprising:a wafer support adjustable to position a first region of the wafer to receive and have implanted therein the ion beam having the first energy level, when present, and adjustable to position a second region of the wafer to receive and have implanted therein the ion beam having the second energy level, when present. 4. The apparatus of claim 3, wherein the wafer support is adjustable to position the wafer in a direction that is substantially perpendicular to the implanted ion beams. 5. The apparatus of claim 3, wherein the wafer support is rotatatable. 6. The apparatus of claim 3, wherein the wafer support is variably tiltable. 7. The apparatus of claim 1, wherein the first deceleration unit further comprises a first deceleration suppressor capable of and positioned to accelerate the initially-decelerated ion beam. 8. A partial ion implantation method comprising:providing a wafer having first and second ion-implantable regions;generating an ion beam;decelerating the generated ion beam in a first deceleration step;in a second deceleration step, decelerating the energy level of the ion beam into a first or second energy level according to regions of the wafer; and,implanting ions from the ion beam having the first energy level, when present, into the first wafer region, and implanting ions from the ion beam having the second energy level, when present, into the second wafer region. 9. The method of claim 8 further comprising:moving the wafer such that ions from the ion beam having the first energy level, when present, are implanted into the first wafer region, and ions from the ion beam having the second energy level, when present, are implanted into the second wafer region. 10. The method of claim 8 further comprising accelerating the energy of the ion beam after the first deceleration step and prior to the second deceleration step.