Patent ID: 7435977

Claim:
An ion implantation system comprising: an ion source that generates an ion beam; a beam line assembly that receives the ion beam from the ion source and processes the ion beam; and an angle detector that receives the ion beam from the beam line assembly comprising: a first unitary structure having a slot there through, the slot comprising an entrance opening, an exit opening, and a slot profile between the entrance opening and the exit opening forming a blocking angle, wherein the entrance opening and the exit opening have different shapes or different dimensions with respect to one another, and/or the slot profile has a shape according to a selected range of angles in a first direction, wherein the slot selectively passes through a portion of the ion beam according to the selected range of angles in the first direction; and a first sensor mechanism that receives the portion of the ion beam that passes through the first unitary structure exit opening and obtains a beam current measurement of the portion.