Abstract:
Initially, an ion beam is formed as an elongated shape incident on a wafer, where the shape has a length along a first axis longer than a diameter of the wafer, and a width along a second axis shorter than the diameter of the wafer. Then, a center of the wafer is moved along a scan path intersecting the ion beam at a movement velocity, and the wafer is rotated around at a rotation velocity simultaneously. During the simultaneous movement and rotation, the wafer is totally overlapped with the ion beam along the first axis when the wafer intersects with the ion beam, and the rotation velocity is at most a few times of the movement velocity. Both the movement velocity and the rotation velocity can be a constant or have a velocity profile relative to a position of the ion beam across the wafer.
Abstract:
PROBLEM TO BE SOLVED: To provide an ion implant method and an ion implanter using a variable aperture.SOLUTION: A variable aperture within an aperture adjustment device is used to shape the ion beam before the substrate is implanted by a shaped ion beam, especially to finally shape the ion beam in a position near the substrate. Hence, different portions of a substrate, or different substrates, can be implanted respectively by different shaped ion beams without going through using multiple fixed apertures or retuning the ion beam each time. In other words, different implantations may be achieved respectively by customized ion beams without high cost and complex operation. Moreover, the beam tune process for acquiring a specific ion beam to be implanted may be accelerated, because the adjustment of the variable aperture may be achieved simply by mechanical operation compared with prior arts.
Abstract:
PROBLEM TO BE SOLVED: To provide an ion implantation system.SOLUTION: An ion implantation system includes an ion beam generator, a mass separation device, a holder device, and a first detector. The ion beam generator generates first ion beam. The mass separation device separates second ion beam containing required ions from the first ion beam. The holder device fixes at least one substrate. The holder device and the first detector relatively moves forward and backward in a first direction opposite to the second ion beam, so as to make the substrate and the first detector pass through a projection region of the second ion beam. The first detector acquires a related parameter of the second ion beam. The system acquires the related parameter of the ion beam during implantation of the ions. The system immediately adjusts manufacturing parameters, to achieve a preferable ion implantation effect.
Abstract:
PROBLEM TO BE SOLVED: To provide an ion implantation method and an ion implantation machine utilizing a variable aperture.SOLUTION: There is provided an aperture adjusting device which changes the shape of an ion beam, especially, changes the final shape of the ion beam nearby a substrate, and carries out ion implantation in the substrate with the ion beam having been shaped. The ion implantation in a different part of the substrate or a different substrate is performed with the ion beam having been shaped differently in a state in which a plurality of fixed apertures are not used or the ion beam is not re-adjusted at each time. Namely, different ion implantation can be performed with a specially-shaped ion beam neither at high cost nor through complicated operation. As compared with known techniques, the variable aperture is easily adjusted through machine operation, so an ion beam adjusting process is quickened to achieve an ion beam adjusting process for a specific ion beam for ion implantation.