Abstract:
In a particle-optical projection system (32) a pattern (B) is imaged onto a target (tp) by means of energetic electrically charged particles. The pattern is represented in a patterned beam (pb) of said charged particles emerging from the object plane through at least one cross-over (c); it is imaged into an image (S) with a given size and distortion. To compensate for the Z-deviation of the image (S) position from the actual positioning of the target (tp) (Z denotes an axial coordinate substantially parallel to the optical axis cx), without changing the size of the image (S), the system comprises a position detection means (ZD) for measuring the Z-position of several locations of the target (tp), a control means (33) for calculating modifications (cr) of selected lens parameters of the final particle-optical lens (L2) and controlling said lens parameters according to said modifications.
Abstract translation:在粒子光学投影系统(32)中,通过能量带电粒子将图案(B)成像到目标(tp)上。 所述图案通过至少一个交叉(c)从所述物体平面出射的所述带电粒子的图案化束(pb)中表示; 它被成像为具有给定大小和失真的图像(S)。 为了补偿图像(S)位置与目标的实际定位(tp)(Z表示基本上平行于光轴cx的轴向坐标)的Z偏差,而不改变图像(S)的尺寸, 该系统包括用于测量目标(tp)的若干位置的Z位置的位置检测装置(ZD),用于计算最终粒子光学透镜的选定透镜参数的修改(cr)的控制装置(33) L 2),并根据所述修改来控制所述透镜参数。
Abstract:
An ion beam generation device including an ion source, an extraction mechanism for ions emitted by the source, an accelerating mechanism of the ions thus extracted, a selector for the ions thus accelerated, and an electrostatic optical system for focusing the selected ions along a first axis. Further, a mechanism varies the distance between the ion source and the extraction means, this distance being counted along a second axis parallel to the first axis and constituting the axis of the ion beam emitted by the source. The device may be particularly applied to the manufacture of nanostructures.
Abstract:
A high data-rate electron beam spot-grid array imaging system is provided that overcomes the low resolution and severe linearity requirements of prior art systems. Embodiments include an imaging system comprising an electron beam generator for simultaneously irradiating an array of spots spaced apart from each other on a surface of an object to be imaged, and a detector for collecting backscattered and/or secondary electrons emitted as a result of the interaction of the spots with the surface of the object to form an image of the irradiated portions of the object surface. A mechanical system moves the substrate in a direction which is nearly parallel to an axis of the array of spots such that as the substrate is moved across the spot array in the scan direction (the y-direction) the spots trace a path which leaves no gaps in the mechanical cross-scan direction (the x-direction). A compensator, such as a servo or a movable mirror, compensates for mechanical inaccuracies in the moving stage, thereby increasing imaging accuracy. In other embodiments, multiple detectors placed at different angles to the substrate collect electrons to provide multiple perspective imaging of the substrate surface.
Abstract:
An ion implantation method is disclosed in this invention. The disclosed method is for implanting a target wafer with ions extracted from an ion source traveling along an original ion beam path. The method includes steps of a) employing a set of deceleration electrodes disposed along the original ion beam path before the target wafer for decelerating and deflecting the ion beam to the target wafer; and b) employing a charged particle deflecting means disposed between the ion source and the set of deceleration electrodes for deflecting the ion beam away from original ion beam path and projecting to the set of electrodes with an incident angle for the set of electrodes to deflect the ion beam back to the original ion beam path for implanting the target wafer.
Abstract:
A charged particle beam exposure apparatus includes a charged particle beam generator, a deflector device for deflecting the charged particle beam electromagnetically to individually illuminate small areas of a pattern forming region formed on a transparent mask, apparatus for moving the transparent mask mechanically, and the various components required for reducing the charged particle beam pattern through the mask and projecting the same onto a semiconductor device substrate to be exposed. A semiconductor device is fabricated using such apparatus by moving the mask mechanically to position a pattern forming region at a predetermined exposure position. The pattern forming region includes a plurality of small areas which can be individually selected by deflecting the charged particle beam when the pattern forming region is positioned at the exposure position. Each individual area is of a size such that the entirety thereof is exposed when the beam is deflected onto such area.
Abstract:
A multi-beam apparatus for observing a sample with high resolution and high throughput is proposed. In the apparatus, a source-conversion unit forms plural and parallel images of one single electron source by deflecting plural beamlets of a parallel primary-electron beam therefrom, and one objective lens focuses the plural deflected beamlets onto a sample surface and forms plural probe spots thereon. A movable condenser lens is used to collimate the primary-electron beam and vary the currents of the plural probe spots, a pre-beamlet-forming means weakens the Coulomb effect of the primary-electron beam, and the source-conversion unit minimizes the sizes of the plural probe spots by minimizing and compensating the off-axis aberrations of the objective lens and condenser lens.
Abstract:
The invention relates to charged particle beam generator comprising a charged particle source for generating a charged particle beam, a collimator system comprising a collimator structure with a plurality of collimator electrodes for collimating the charged particle beam, a beam source vacuum chamber comprising the charged particle source, and a generator vacuum chamber comprising the collimator structure and the beam source vacuum chamber within a vacuum, wherein the collimator system is positioned outside the beam source vacuum chamber. Each of the beam source vacuum chamber and the generator vacuum chamber may be provided with a vacuum pump.
Abstract:
A semiconductor wafer includes a first surface and an implantation area adjacent to the first surface and a certain distance away from the first surface, the implantation area including implanted particles and defects. A defect concentration in the implantation area deviates by less than 5% from a maximum defect concentration in the implantation area.
Abstract:
A multi-beam apparatus for observing a sample with high resolution and high throughput is proposed. In the apparatus, a source-conversion unit forms plural and parallel images of one single electron source by deflecting plural beamlets of a parallel primary-electron beam therefrom, and one objective lens focuses the plural deflected beamlets onto a sample surface and forms plural probe spots thereon. A movable condenser lens is used to collimate the primary-electron beam and vary the currents of the plural probe spots, a pre-beamlet-forming means weakens the Coulomb effect of the primary-electron beam, and the source-conversion unit minimizes the sizes of the plural probe spots by minimizing and compensating the off-axis aberrations of the objective lens and condenser lens.
Abstract:
A substrate processing method capable of performing a stable plasma process includes: supplying a source gas under a first plasma atmosphere using a substrate processing apparatus including a power generation unit, a first reactor, and a matching network between the power generation unit and the first reactor; purging the source gas; supplying a reaction gas under a second plasma atmosphere; and purging the reaction gas, wherein setting a variable capacitor included in the matching network to a first value is performed during the purging of the source gas, and setting the variable capacitor to a second value is performed during the purging of the reaction gas.