AvaSpec services and calibrations

Solutions for Semiconductor Applications
||| |||

Why Avantes for your Semiconductor application?

  • High resolution (0.1 nm FWHM or better) spectral data collection for optical emission spectroscopy applications such as endpoint detection
  • High-speed measurement capability (ms time scale) for wafer probing throughput
  • Ability to support thin film metrology applications with a broadband instrument configuration covering 360-1100 and 200-1100 nm.
  • Wide selection of back-thinned CCD array instruments for optimal SWIR measurements (800-1100 nm) of coatings
  • Affordable NIR spectrometer options with high speed, low noise electronics

Related Products

AvaSpec Mini
AvaSpec-Mini- 2048/4096-MKII
AvaSpec Mini
Vacuum Feed-through


The Semiconductor industry can realize significant benefits from spectroscopic measurements during various stages of their processes.  Fiber optic-based spectrometers offer a great value to the industry due to their ability to facilitate in situ measurements within processing environments and facilitate near real-time analysis.

Avantes works with semiconductor applications such as end-point detection for plasma ion etching, ion beam etching, photoresist stripping, and chemical/mechanical polishing. Instrument configurations have also been deployed in environments for thin film metrology (inline and offline) and plasma diagnostics.

OES spectra 3Plasma Diagnostics & End Point Detection 

Measuring a complex yet dynamic matrix like plasma requires high-speed acquisition combined with high resolution.  Real-time, high-resolution spectroscopic sampling of plasma can be realized using the AvaSpec-ULS4096CL-EVOand AvaSpec-ULS2048CL-EVO spectrometer.  The AvaSpec-ULS4096CL-EVO is configurable over the range from 190-1100 nm with resolution as high as 0.05 nm (FWHM) and communication options including USB3, gigabit ethernet, and RS-232.  The AvaSpec-ULS2048CL-EVO offers the same spectral range (200-1100 nm) and resolution as high as 0.07 nm. CdTe reflection spectra The optical interface for both spectrometers are fiber optic cables or probes which are available in a variety of configurations (see below).  Either of these spectrometers can be integrated as an OEM module or within a laboratory or rackmount housing.  The rackmount housing option facilitates arrayed instruments for environments where high resolution is needed over a large spectral range or multiple reductant measurements are desired within a process.  Frequently, instruments configured for plasma diagnostics and endpoint detection are intensity calibrated using a NIST traceable calibration source and these calibration services are available from Avantes.

thin filmThin Film Measurements

During coating processes and after completion, thin film thickness measurement may be required to ensure processes are under control.  It may be desirable to stop a coating process based on a measured value obtained during the deposition. The measurement of thin films is achieved through a  reflection or transmission measurement in which known optical constants of the substrate and coating materials are used to calculate theoretical thickness which is then compared to measured thickness through an optical probe or transmission stage.  Avantes has deployed the AvaSpec-ULS2048CL-EVO  spectrometer into multiple thin film applications.  Reflection and transmission-based thin film measurements are typically done in the 200-1100 nm range and are suited to coatings ranging from 10 nm - 50 µm.  For thicker film measurements, Avantes NIRline instruments can be utilized. The AvaSpec-NIR256/512-1.7-EVO and AvaSpec-NIR256/512-1.7-HSC-EVO  are the most commonly deployed instruments for near-infrared thin film metrology.  Avantes offers a complete line of light sources to support the illumination side of the thin film measurement.  The AvaLight-Dhc and AvaLight-DH-S deuterium halogen light sources and AvaLight-HAL-S-Mini tungsten halogen sources are available as independent sources or for integration into rackmount configuration next to the spectrometer(s) used for measurement.

Wafer Inspection silicon wafer

The inspection or probing of wafers is ideally suited to fiber-optic spectroscopy as it facilitates measurements of very small areas (as low as 50-100 micron spot sizes).  Typical wafer probing applications involve the measurement of reflection at high speed in the ultra-violet, visible or near infrared from 200-1100 nm.   Avantes uses a variety of instruments for this application including the AvaSpec-ULS2048XL-EVOhigh sensitivity back-thinned spectrometer or the AvaSpec-ULS2048-USB2 spectrometer.  As the resolution is not typically critical in this application, focus is placed on throughput in lieu of resolution to optimize on sampling speeds.   Avantes' AvaSpec-ULS2048L-EVO  and AvaSpec-ULS2048CL-EVO offers the advantage of ultra-fast USB3 communication to facilitate the maximum sample acquisition speeds.

OEM Products

All Avantes instruments are available as laboratory instruments in single channel housing or multi-channel "rackmount" housings as well as OEM modules (see below)


AvaSpec Mini
AvaSpec-Mini- 2048/4096-MKII
Optical Bench Modules
Electronics Boards


Fibers and Probes

In many cases, fiber optic sampling is useful to photonics applications. Avantes offers a complete line of fiber optic and sampling accessories to facilitate your measurements. Requests for customization are welcome.

AvaSpec Mini
Hi-Temp Probes
AvaSpec Mini
Reflection Probes
Multi-furcated Fibers
Vacuum Feed-through


Read More 


For more information about these or any other semiconductor industry applications, please contact a Sales Engineer at in the EMEA or APAC regions or in North America.