CATHODE GUIDE

Cathode Styles

Source Material

Overview

Modification Abilities

Standard - Single Source Crystal

Top Hat - Large Emission Surface

Guard Ring - Embedded In Carbon

Etched Tip - Point Source

Etched Tip - Point Source

CeBix®

LaB6

Hafnium Carbide

CeBix®

LaB6

Hafnium Carbide

LaB6

Hafnium Carbide

Zirconium Carbide

Hafnium Carbide

Zirconium Carbide

Tungsten

Molybdenum

High Brightness

Relatively Small Spot Size

Extremely Robust

Most Universally Used Style

- Used by many OEMs

Thermal Emitter (TE)

Larger Emission Surface

Greater Total Current

Thermal Emitter (TE)

Defined Emission Area

No Edge Effect

Shape Emission Surface

Thermal Emitter (TE)

Cold Field Emitter (CFE)

- Outperformed W CFE in brightness,

energy distribution, and emission

stability ¹

Extended Schottky Source (ESE)

- 10x higher beam currents than

ZrO/W(100) source operated in Philips

XL40 SEM ²

Cold Field Emitter (CFE)

Rebuilding Services Available

Increase/Decrease Truncation Size

Increase/Decrease Length

Custom or Standard Base

(See Application Guide)

Increase/Decrease Surface Diameter

Customize Surface Orientation

Custom or Standard Base

(See Application Guide)

Customize Surface Orientation

Customize Shape/Size of Guard Ring

Increase/Decrease Source Diameters

Custom or Standard Base

(See Application Guide)

Increase/Decrease Tip Radius

Increase/Decrease Length

Increase/Decrease Heat Power

Customize Height and Geometry

Increase/Decrease Emitter Radius

Customize Crystal Orientation (310)(100)

Customize Height and Geometry

Examples:

Examples:

Examples:

*Product chart displays general categories, but customers are not limited to these options as APTech accepts various customization requests.

*Please consult with a specialist about your desired specifications and application.

¹K.J. Kagarice, G.G. Magera, S.D. Pollard, & W.A. Mackie, “Cold field emission from HfC(310)”, J. Vac. Sci. Technol. B 26(2), Mar/Apr 2008.

²W.A. Mackie, J.M. Lovell, T.W. Curtis, & G.G. Magera, “HfC(310) high brightness sources for advanced imaging applications”, J. Vac. Sci. Technol. B 32(2), Mar/Apr 2014

CeBix

LaB6

Transition Metal

 Carbides

Refractory Metals

Standard

Top Hat

Guard Ring

Etched Tip

Cathode Guide

Application Guide

Rebuilding Services

Refractory Metals
 (Parts)

Source Types

Cathode Dimensions

Guides

Services & Parts

Cathodes

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503.434.5550

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