Abstract:
Provided is an electron beam lens for a micro-column electron beam apparatus and a method of manufacturing the same. A photosensitive glass substrate is used as a base isolation substrate and a thin metal film is grown by a plating method. Holes through which electron beam passes are formed by a lift off method after forming a resist pattern shaped as a hole on a seed metal layer and plating the thin metal film.
Abstract:
This invention relates to an electrooptic system array having a plurality of electron lenses. The electrooptic system array includes upper, middle, and lower electrodes arranged along the paths of a plurality of charged-particle beams, the upper, middle, and lower electrodes having pluralities of apertures on the paths of the plurality of charged-particle beams, an upper shield electrode which is interposed between the upper and middle electrodes and has a plurality of shields corresponding to the respective paths of the charged-particle beams, and a lower shield electrode which is interposed between the lower and middle electrodes and has a plurality of shields corresponding to the respective paths of the charged-particle beams.
Abstract:
Provided is an electron beam lens for a micro-column electron beam apparatus and a method of manufacturing the same. A photosensitive glass substrate is used as a base isolation substrate and a thin metal film is grown by a plating method. Holes through which electron beam passes are formed by a lift off method after forming a resist pattern shaped as a hole on a seed metal layer and plating the thin metal film.
Abstract:
An electron optical system array has a plurality of electron lenses, the system array having at least two electrodes structures which respectively have membranes and are arranged along an optical axis, each of the membranes having a plurality of apertures through which charged-particle beams pass. There is also a spacer which is interposed between the facing membranes and adjacent to the aperture and which determines a gap between the facing membranes.
Abstract:
A method and apparatus for controlling beam emittance by placing a lens array in a drift space of an illumination system component. The illumination system component may be an electron gun or a liner tube or drift tube, attachable to an electron gun. The lens array may be one or more mesh grids or a combination of grids and continuous foils. The lens array forms a multitude of microlenses resembling an optical nullfly's eyenull lens. The lens array splits an incoming solid electron beam into a multitude of subbeams, such that the outgoing beam emittance is different from the incoming beam emittance, while beam total current remains unchanged. The method and apparatus permit independent control of beam current and beam emittance, which is beneficial in a SCALPEL illumination system.
Abstract:
A method and apparatus for controlling beam emittance by placing a quadrupole lens array in a drift space of an illumination system component. The illumination system component may be an electron gun or a liner tube or drift tube, attachable to an electron gun. The quadrupole lens array may be three or more mesh grids or a combination of grids and continuous foils. The quadrupole lens array forms a multitude of microlenses resembling an optical “fly's eye” lens. The quadrupole lens array splits an incoming solid electron beam into a multitude of subbeams, such that the outgoing beam emittance is different from the incoming beam emittance, while beam total current remains unchanged. The method and apparatus permit independent control of beam current and beam emittance, which is beneficial in a SCALPEL illumination system.
Abstract:
An electron beam exposure apparatus for exposing a wafer of the present invention includes: a multi-axis electron lens operable to converge a plurality of electron beams independently of each other; and an illumination switching unit operable to switch whether or not electron beams are to be incident on the wafer, for each electron beam independently of other electron beams.
Abstract:
A method and the associated apparatus for alignment and assembly of microlenses and microcolumns in which aligning structures such as rigid fibers are used to precisely align multiple microlens components. Alignment openings are formed in the microlens components and standard optical fibers are threaded through the openings in each microlens component as they are stacked. The fibers provide sufficient stiffness and stability to the structure to precisely align the apertures of the microlens components and thereby allow for increased assembly efficiency over traditional microlens and microcolumn bonding techniques.
Abstract:
A multi-beam apparatus for multi-beam inspection with an improved source conversion unit providing more beamlets with high electric safety, mechanical availability and mechanical stabilization has been disclosed. The source-conversion unit comprises an image-forming element array having a plurality of image-forming elements, an aberration compensator array having a plurality of micro-compensators, and a pre-bending element array with a plurality of pre-bending micro-deflectors. In each of the arrays, adjacent elements are placed in different layers, and one element may comprise two or more sub-elements placed in different layers. The sub-elements of a micro-compensator may have different functions such as micro-lens and micro-stigmators.
Abstract:
A multi-beam apparatus for multi-beam inspection with an improved source conversion unit providing more beamlets with high electric safety, mechanical availability and mechanical stabilization has been disclosed. The source-conversion unit comprises an image-forming element array having a plurality of image-forming elements, an aberration compensator array having a plurality of micro-compensators, and a pre-bending element array with a plurality of pre-bending micro-deflectors. In each of the arrays, adjacent elements are placed in different layers, and one element may comprise two or more sub-elements placed in different layers. The sub-elements of a micro-compensator may have different functions such as micro-lens and micro-stigmators.