Patent ID: 7078713

Claim:
In an ion implanter apparatus including a source for the generation of charged particles as a continuous ion beam, means for directing the continuous ion beam in a desired direction, and a plane surface for the implantation of charged particles in the continuous ion beam into a prepared workpiece, the improvement of an electromagnetic regulator assembly for adjusting and controlling the uniformity of charged particles in a continuous ion beam, said regulator assembly comprising: a multipole coil array comprised of (i) a straight support rod comprising ferromagnetic material and having a predetermined length and girth, and (ii) at least two wire coils disposed individually, orthogonally, and adjacently at pre-chosen sites on said support rod, each of said wire coils being formed of electrically conductive matter; a boundary plate presenting a planar surface which is positioned to lie parallel to and at a preset gap distance from said multipole coil array, said boundary plate being of predetermined dimensions and configuration and comprising ferromagnetic material; means for introducing electrical energy individually to each wire coil disposed on said support rod; an electric current controller for the independent adjustment and control of the electrical energy introduced individually to each wire coil disposed on said support rod of said array, whereby each energized wire coil generates an orthogonally extending and current adjusted magnetic field gradient of limited breadth, and whereby a plurality of said orthogonally extending and current adjusted magnetic field gradients of limited breadth collectively form a contiguous magnetic field having a customized magnetic field gradient, and whereby the application of said customized magnetic field gradient of said contiguous magnetic field will increase the uniformity of charged particles in a continuous ion beam; and a circumscribed spatial passageway for applying said contiguous magnetic field having a customized magnetic field gradient to a continuous ion beam traveling therethrough, wherein said spatial passageway is dimensionally circumscribed in an x-axis direction by the length of said multipole coil array and in a y-axis direction by a preset gap distance separating said multipole array from said plane surface of said boundary plate, and wherein the degree of uniformity for the charged particles of a continuous ion beam becomes increased.