Kla Tencor Corporation

Kla Corporation

Leland Stanford Junior University

Kla-tencor Technologies Corporation

Tomas Plettner

Mehran Nasser-Ghodsi

John Gerling

Robert Haynes

Christopher Sears

Aron Welk

Robert L Byer

Rudy Flores Garcia

Mohammed Tahmassebpur

Qian Zhang

Sameet K Shriyan

Garrett Pickard

Jason Huang

Jeong Ho Lee

Christopher Malcolm Stanley Sears

Mehran Nasser Ghodsi

Wayne Chiwoei Lo

Doug Larson

Edward Wagner

Mark Cawein

Joseph Maurino

Ernesto Escorcia

Felipe Fuks

John David Gerling

A multi-beam electronics scanning system using swathing. The system includes an electron emitter source configured to emit an illumination beam. The illumination beam is split into multiple electron beams by a beam splitter lens array. The system also includes an electronic deflection system configured to deflect each of the electron beams in a plurality of directions, including a first direction, along two different axes. Last, a swathing stage is used to move a sample with a constant velocity in a second direction that is parallel to the first direction.

Multi-beam electronics scan

The present disclosure provides an inspection system and a method of stray field mitigation. The system includes an array of electron beam columns, a first permanent magnet array, and a plurality of shielding plates. The array of electron beam columns each includes an electron source configured to emit electrons toward a stage. The first permanent magnet array is configured to condense the electrons from each electron source into an array of electron beams. The first permanent magnet array is arranged at a first end of the array of electron beam columns. The plurality of shielding plates extend across the array electron beam columns downstream of the first permanent magnet array in a direction of electron emission. The array of electron beams pass through a plurality of apertures in each of the plurality of shielding plates, which reduces stray magnetic field in a radial direction of the array of electron beams.

Shielding strategy for mitigation of stray field for permanent magnet array

An aperture array for a multi-beam array system and a method of selecting a subset of a beam from a multi-beam array system are provided. The aperture array comprises an array body arranged proximate to a beam source. The array body comprises a plurality of apertures, at least two of the apertures having different geometries. The array body is movable, via an actuator, relative to an optical axis of the beam source, such that a subset of a beam from the beam source is selected based on the geometry of the aperture that is intersected by the optical axis.

Shaped aperture set for multi-beam array configurations

A multi-column scanning electron microscopy (SEM) system includes a column assembly, where the column assembly includes a first substrate array assembly and at least a second substrate array assembly. The system also includes a source assembly, the source assembly including two or more illumination sources configured to generate two or more electron beams and two or more sets of a plurality of positioners configured to adjust a position of a particular illumination source of the two or more illumination sources in a plurality of directions. The system also includes a stage configured to secure a sample, where the column assembly directs at least a portion of the two or more electron beams onto a portion of the sample.

Multi-column scanning electron microscopy system

A multi-column scanning electron microscopy (SEM) system is disclosed. The SEM system includes a source assembly. The source assembly includes two or more electron beam sources configured to generate a plurality of electron beams. The source assembly also includes two or more sets of positioners configured to actuate the two or more electron beam sources. The SEM system also includes a column assembly. The column assembly includes a plurality of substrate arrays. The column assembly also includes two or more electron-optical columns formed by a set of column electron-optical elements bonded to the plurality of substrate arrays. The SEM system also includes a stage configured to secure a sample that at least one of emits or scatters electrons in response to the plurality of electron beams directed by the two or more electron-optical columns to the sample.

A permanent-magnet particle beam apparatus and method incorporating a non-magnetic portion for tunability are provided. The permanent-magnet particle beam apparatus includes a particle beam emitter that emits a charged particle beam, and includes a set of permanent magnets forming a magnetic field for controlling condensing of the charged particle beam. The permanent-magnet particle beam apparatus further includes a non-magnetic electrical conductor component situated with the set of permanent magnets to control a kinetic energy of the charged particle beam moving through the magnetic field.

Permanent-magnet particle beam apparatus and method incorporating a non-magnetic metal portion for tunability

A metrology system is configured to provide visual inspection of a workpiece, three-dimensional magnetic field map, and height measurement. A stage is configured to bring points of interest at the workpiece under the desired tool for measurement. The optical field, magnetic field, and height information can be used independently or together in order to correlate defects in the manufacturing process of the workpiece. This abstract is provided to comply with rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Apparatus and method for optical inspection, magnetic field and height mapping

A charged particle detection device has an active portion for configured to produce a signal in response secondary charged particles emitted from a sample landing on the active portion. The active portion is shaped to accommodate an expected asymmetric pattern of the secondary charged particles at a detector. This abstract is provided to comply with rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Asymmetrical detector design and methodology

An array of spatially separated beamlets is produced by a corresponding array of charged particle emitters. Each emitter is at an electrostatic potential difference with respect to an immediately adjacent emitter in the array. The beamlets are converged laterally to form an charged particle beam. The beam is modulated longitudinally with infrared radiation to form a modulated beam. The charged particles in the modulated beam are bunched longitudinally to form a bunched beam. The bunched beam may be modulated with an undulator to generate a coherent radiation output. This abstract is provided to comply with rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

DC high-voltage super-radiant free-electron based EUV source

One embodiment disclosed relates to an apparatus forming an electrical conduction path through an insulating layer on a surface of a substrate. A first radiation source is configured to emit radiation to a first region of the insulating layer, and a first electrical contact is configured to apply a first bias voltage to the first region. A second radiation source is configured to emit radiation to a second region of the insulating layer, and a second electrical contact is configured to apply a second bias voltage to the second region. The conductivities of the regions are increased by the radiation such that conductive paths are formed through the insulating layer at those regions. In one implementation, the apparatus may be used in an electron beam instrument. Another embodiment relates to a method of forming an electrical conduction path through an insulating layer. Other embodiments, aspects and features are also disclosed.

Apparatus and methods for forming an electrical conduction path through an insulating layer

One embodiment disclosed relates to an electron source for generating an electron beam. The electron source includes an electron emitter having a tip from which an electron beam is extracted. The electron further includes a non-planar extractor with an extractor opening and a built-in beam-limiting aperture. The extractor opening is larger than the beam-limiting aperture, and central axes of both the extractor opening and the beam-limiting aperture are aligned with the tip along a beam axis. Another embodiment relates to a method of generating an electron beam using an electron source having a non-planar extractor. Another embodiment relates to an array of electron sources for generating an array of electron beams. The array of electron sources includes an array of electron emitters and an array of non-planar extractor structures. Other embodiments, aspects and features are also disclosed.

Non-planar extractor structure for electron source

Systems, methods, devices and apparatus are implemented for producing controllable charged particle beams. In one implementation, an apparatus provides a deflection force to a charged particle beam. A source produces an electromagnetic wave. A structure, that is substantially transparent to the electromagnetic wave, includes a physical structure having a repeating pattern with a period L and a tilted angle &#x3b1;, relative to a direction of travel of the charged particle beam, the pattern affects the force of the electromagnetic wave upon the charged particle beam. A direction device introduces the electromagnetic wave to the structure to provide a phase-synchronous deflection force to the charged particle beam.

Growing community of inventors

San Ramon, CA, United States of America

Tomas Plettner