公开(公告)号：US20190108963A1

公开(公告)日：2019-04-11

申请号：US16153103

申请日：2018-10-05

Applicant: KLA-TENCOR CORPORATION

Inventor： Frances Hill ,  Gildardo R. Delgado ,  Rudy F. Garcia ,  Michael E. Romero ,  Katerina Ioakeimidi

IPC: H01J1/304 ,  H01J1/34

Abstract: Electron source designs are disclosed. The emitter structure, which may be silicon, has a layer on it. The layer may be graphene or a photoemissive material, such as an alkali halide. An additional layer between the emitter structure and the layer or a protective layer on the layer can be included. Methods of operation and methods of manufacturing also are disclosed.

公开(公告)号：US10804069B2

公开(公告)日：2020-10-13

申请号：US16704061

申请日：2019-12-05

Applicant: KLA-TENCOR CORPORATION

Inventor： Katerina Ioakeimidi ,  Gildardo R. Delgado ,  Michael E. Romero ,  Frances Hill ,  Rudy F. Garcia

IPC: H01J37/073 ,  H01J37/26 ,  G02B27/09 ,  H01J40/06 ,  H01J40/18 ,  H01J1/304 ,  H01J19/24 ,  H01J37/06 ,  H01J37/28 ,  H01J1/34 ,  H01L21/67

Abstract: A photocathode can include a body fabricated of a wide bandgap semiconductor material, a metal layer, and an alkali halide photocathode emitter. The body may have a thickness of less than 100 nm and the alkali halide photocathode may have a thickness less than 10 nm. The photocathode can be illuminated with a dual wavelength scheme.

公开(公告)号：US20200279713A1

公开(公告)日：2020-09-03

申请号：US16106272

申请日：2018-08-21

Applicant: KLA-TENCOR CORPORATION

Inventor： Gildardo R. Delgado ,  Katerina Ioakeimidi ,  Rudy Garcia ,  Zefram Marks ,  Gary V. Lopez Lopez ,  Frances A. Hill ,  Michael E. Romero

IPC: H01J37/073 ,  H01J37/22 ,  G01N23/20058

Abstract: The system includes a photocathode electron source, diffractive optical element, and a microlens array to focus the beamlets. A source directs a radiation beam to the diffractive optical element, which produces a beamlet array to be used in combination with a photocathode surface to generate an array of electron beams from the beamlets.

公开(公告)号：US10748737B2

公开(公告)日：2020-08-18

申请号：US16149260

申请日：2018-10-02

Applicant: KLA-TENCOR CORPORATION

Inventor： Katerina Ioakeimidi ,  Gildardo R. Delgado ,  Frances Hill ,  Michael E. Romero ,  Rudy F. Garcia

IPC: H01J37/073 ,  H01J37/26 ,  G02B27/09 ,  H01J40/06 ,  H01J40/18 ,  H01J1/304 ,  H01J19/24 ,  H01J37/06 ,  H01J37/28 ,  H01J1/34 ,  H01L21/67

Abstract: A flat top laser beam is used to generate an electron beam with a photocathode that can include an alkali halide. The flat top profile can be generated using an optical array. The laser beam can be split into multiple laser beams or beamlets, each of which can have the flat top profile. A phosphor screen can be imaged to determine space charge effects or electron energy of the electron beam.

公开(公告)号：US10714295B2

公开(公告)日：2020-07-14

申请号：US16259317

申请日：2019-01-28

Applicant: KLA-TENCOR CORPORATION

Inventor： Gildardo R. Delgado ,  Katerina Ioakeimidi ,  Frances Hill ,  Gary V. Lopez Lopez ,  Rudy F. Garcia

IPC: H01J40/06 ,  H01J1/34 ,  H01J37/28

Abstract: A photocathode structure, which can include one or more of Cs2Te, CsKTe, CsI, CsBr, GaAs, GaN, InSb, CsKSb, or a metal, has a protective film on an exterior surface. The protective film includes one or more of ruthenium, nickel, platinum, chromium, copper, gold, silver, aluminum, or an alloy thereof. The protective film can have a thickness from 1 nm to 10 nm. The photocathode structure can be used in an electron beam tool like a scanning electron microscope.

公开(公告)号：US10395884B2

公开(公告)日：2019-08-27

申请号：US16150675

申请日：2018-10-03

Applicant: KLA-TENCOR CORPORATION

Inventor： Gildardo R. Delgado ,  Rudy F. Garcia ,  Katerina Ioakeimidi ,  Frances Hill ,  Michael E. Romero

IPC: H01J19/24 ,  H01J37/06 ,  H01J37/28

Abstract: A photocathode structure, which can include an alkali halide, has a protective film on an exterior surface of the photocathode structure. The protective film includes ruthenium. This protective film can be, for example, ruthenium or an alloy of ruthenium and platinum. The protective film can have a thickness from 1 nm to 20 nm. The photocathode structure can be used in an electron beam tool like a scanning electron microscope.

公开(公告)号：US20190108964A1

公开(公告)日：2019-04-11

申请号：US16150399

申请日：2018-10-03

Applicant: KLA-TENCOR CORPORATION

Inventor： Katerina Ioakeimidi ,  Gildardo R. Delgado ,  Michael E. Romero ,  Frances Hill ,  Rudy F. Garcia

IPC: H01J1/34 ,  H01J40/18 ,  H01J40/06

Abstract: A photocathode can include a body fabricated of a wide bandgap semiconductor material, a metal layer, and an alkali halide photocathode emitter. The body may have a thickness of less than 100 nm and the alkali halide photocathode may have a thickness less than 10 nm. The photocathode can be illuminated with a dual wavelength scheme.