Abstract:
A micro column electron beam apparatus having a reduced number of interconnections is provided. The micro column electron beam apparatus includes: a low temperature co-fired ceramic (LTCC) substrate; a plurality of deflector electrodes attached to a predetermined top portion of the LTCC substrate; a pad electrode placed at a top edge of the LTCC substrate and transmitting an external signal to the deflector electrodes; and a connection unit placed in the LTCC substrate and electrically connecting the deflector electrode and the pad electrode.
Abstract:
The invention relates to an apparatus for generating a plurality of charged particle beamlets, comprising a charged particle source for generating a diverging charged particle beam, a converging means for refracting said diverging charged particle beam and a lens array comprising a plurality of lenses, wherein said lens array is located between said charged particle source and said converging means.In this way, it is possible to reduce aberrations of the converging means.
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 “fly's eye” 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:
The invention relates to a multiple beam charged particle optical system, comprising an electrostatic lens structure with at least one electrode, provided with apertures, wherein the effective size of a lens field effected by said electrode at a said aperture is made ultimately small. The system may comprise a diverging charged particle beam part, in which the lens structure is included. The physical dimension of the lens is made ultimately small, in particular smaller than one mm, more in particular less than a few tens of microns. In further elaboration, a lens is combined with a current limiting aperture, aligned such relative to a lens of said structure, that a virtual aperture effected by said current limiting aperture in said lens is situated in an optimum position with respect to minimizing aberrations total.
Abstract:
A method for creating an electron lens includes the steps of applying a polymer layer on an emitter surface of an electron emitter and then curing the polymer layer to reduce volatile content.
Abstract:
The present invention provides a method for manufacturing a lens assembly of a microcolumn having a plurality of microlenses and a plurality of insulating layers alternately interposed between the microlenses. The method includes forming at least one first microlens assembly set (set—1) by anodic-bonding an insulating layer (101) and a microlens (102) together; layering a second microlens assembly set (set—2) on the first microlens assembly set (set—1); and scanning a laser beam, thus welding the first microlens assembly set (set—1) to the microlens of the second microlens assembly set (set—2). The method of the present invention further includes anodic-bonding the microlens assembly sets together.
Abstract:
The invention relates to an apparatus for generating a plurality of charged particle beamlets, comprising a charged particle source for generating a diverging charged particle beam, a converging means for refracting said diverging charged particle beam and a lens array comprising a plurality of lenses, wherein said lens array is located between said charged particle source and said converging means.In this way, it is possible to reduce aberrations of the converging means.
Abstract:
An electron beam column package comprises a plurality of layers having components, such as lenses, coupled thereto. The layers may be made of LTCC, HTCC or other layer technology.
Abstract:
The invention provides a lens system for a plurality of charged particle beams. Therein, at least one common excitation coil for at least two lens modules is provided. The lens modules comprise an first pole piece, a second pole piece and at least one opening for a charged particle beam. The lens modules constitute a component and share the excitation coil. Thereby, raw material availability, processing of work pieces and symmetry conditions for the lens fields are improved.
Abstract:
A micro column electron beam apparatus having a reduced number of interconnections is provided. The micro column electron beam apparatus includes: a low temperature co-fired ceramic (LTCC) substrate; a plurality of deflector electrodes attached to a predetermined top portion of the LTCC substrate; a pad electrode placed at a top edge of the LTCC substrate and transmitting an external signal to the deflector electrodes; and a connection unit placed in the LTCC substrate and electrically connecting the deflector electrode and the pad electrode.