SPT-20 - Ion Sputter Coater

A simple to use, compact and cost-effective solution for sputter coating non-conductive specimens in SEM sample preparation. Features a user friendly touch screen interface, and supports multiple metal types.



COXEM manufactures and provides Scanning Electron Microscope (SEM), the most widely used platform technology in Nano- Metrology of Nano-scale. As a partner of Nano-fusion technology that changes industrial condition in 21 century, COXEM tries to provide the best quality service. SEM is the precision instrument, can be used for analysing the shapes or constituents of microstructure materials in quantitative and qualitative. SEM is an essential instrument for development of basic science and an indispensable infra for technical innovation, used in chemistry, biology, material science as well as nano-materials and nano-biology.

CN Tech are the exclusive Coxem distributor for:

United Kingdom and Republic of Ireland.

Key Features

  • Digital ion coater
  • Vacuum coating - One touch coating system up to the normal pressure
  • Stable coating with coating current feedback function
  • Can be used with various​ metal targets
  • Uses low-noise rotary pump

Easy to use

The COXEM SPT-20 Ion Sputter Coater is an easy to use, compact and cost-effective solution for sputter coating in scanning electron microscopy sample preparation. Non-conductive samples can be challenging to image in electron microscope. Electron build up will cause charging, which degrading image quality. A high quality sputter coater can remedy this, by coating non-conductive samples in a thin layer of conductive material.

Metal Sputtering

COXEM's SPT-20 Ion Coater provides metal sputtering for multiple types of metal, including Gold (Au) and Platinum (Pt). A stable coating is ensured with a built-in coating current feedback function.

Sputter coating is easy with the STP-20, which features a user friendly touch screen interface. Coating time can be configured via the interface, and commonly used coating settings can be saved as selectable recipes.


Compact Size

The SPT-20 has a compact size, and the included compact, low-noise rotary vane vacuum pump provides a fast vacuum for best coating results and efficiency. To ensure the best imaging results, an SPT-20 Sputter Coater an ideal accessory for a COXEM electron microscope.


Target Gold/Platinum (Gold Fitted as Standard)
Target Size 50.8 mm Dia.X 0.1mm Thick
Power Consumption AC220V, 300W
Ion Current 1 ~ 9 mA
Chamber Size Ø 100mm
Pump Rotary pump (50L), 14kg
Dimensions 420(W)x220(D)x230mm, 10kg


Before Coating

After Coating



SPT-20 Overview

View Brochure

Coxem Product Catalogue

View Brochure

Service Support

Comprehensive repairs and servicing

Annual Support Programs

Your metrology instrumentation is a major investment that is critical to your business operation and success. In today’s competitive climate, it is more important than ever to extend the functionality and peak performance of your metrology equipment years beyond the expiration of your factory warranty. CN Tech’s Support Programs will help ensure that your investment is protected, and that you and your instrument’s are always operating at peak performance.

With over 20 years’ experience servicing and repairing you can be assured that your system is in safe hands. The independent services we offer include system relocation, maintenance visits, parts and consumables, and break down interventions.

CN Tech’s Support Programs are an economical way to guarantee optimal working condition:

  • Annual Preventive Maintenance
  • Priority Technical Assistance
  • Preferred Parts Availability
  • On-Site User Training
  • Remote Diagnostics
  • No surprise repair expense and much more!

Support Contact Example

An example of our service and support contracts are shown below:


Metrology & Instrumentation Annual Support Programs 2022/23

CN Tech's Support Programs will help ensure that your investment is protected, and that you and your instrument’s are always operating at peak performance.

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