Ex Situ

Compact and Easy-to-Use

In Situ

Characterize your process in Real-Time

Automated Mapping

Fast and reliable measurements, up to 300 mm wafers

Multi-Wavelength Ellipsometers

for Thin Film Measurements


The Film Sense Multi-Wavelength Ellipsometers use long-life LED’s and a no-moving-parts ellipsometric detector to provide fast and reliable thin film measurements in an easy-to-use, compact system.


The film thickness of most transparent thin films from 0 – 5000 nm can be determined with excellent precision and accuracy by a simple 1 second measurement.  Optical constants n & k and other film properties can also be measured for many samples.


Film Sense offers the power of Multi-Wavelength Technology, but at the price point of single wavelength ellipsometer and spectroscopic reflectometer systems. Film Sense is ideal for measurements in the research lab, classroom, in situ process control, industrial quality control, and more.

Operation & Features

Multi-Wavelength Ellipsometer

Automating Ellipsometric Data Analysis

Film Sense Model Builder

Products - Multi-Wavelength Ellipsometers


Explore our growing family of Multi-Wavelength Ellipsometers

Products - In Situ ALD

In Situ ALD

Excellent film thickness precision to characterize ALD and ALE processes

Products - Automated Mapping

Automated Mapping

Fast thickness uniformity maps with our compact and affordable system

Products - Software


Powerful data analysis capabilities, with an easy-to-use interface


“These FS-1 ellipsometers are one of the best upgrades to our atomic layer processing reactors, and have now become an integral part of all our experiments on ALD and ALE.”

Dr. Sumit Agarwal - Colorado School of Mines

Click here to learn more about how Colorado School of Mines
is using Film Sense Ellipsometers as part of their research.

Film Sense

“The Film Sense FS-1 in situ ellipsometer has greatly facilitated data acquisition and understanding of the thin film deposition processes in our lab. The instrument was relatively easy to incorporate onto a vacuum chamber, and includes a user-friendly manual and tutorial to explain basic operation. With this tool, we are able to collect much more information during a deposition, including measurements between ALD half-cycles that are not feasible with ex situ techniques. These ellipsometers have become an integral part of our laboratory research, and we look forward to continuing to work with Film Sense in the future."

Rachel Nye, PhD - student in Chemical Engineering
Parsons Research Group, North Carolina State University

Film Sense

“Overall performance, affordability and ease of use has made the FS-1 a workhorse for our ALD process as well as equipment development efforts.  The next generation FS-1EX provides a combination of higher beam intensity and wider spectral range improving both precision and accuracy.  For metallic thin films such as TiN, Pt and Ru, two additional IR wavelengths enhance the ability to monitor film thickness and resistivity in-situ during growth.  This enhanced performance helps us to streamline development efforts by effectively understanding the impact of different process conditions on film quality in real-time.”

Bruce Rayner​ - Principal Scientist
Atomic Layer Deposition, Kurt J. Lesker Company

Click here to learn more about how Kurt J. Lesker Company is using Film Sense Ellipsometers.

Film Sense

"The FS-1 is an excellent basic ellipsometer. Reliable, easy to use, low maintenance, and great value for money. Films Sense have been great at helping us characterize our thin films, and get accurate measurements. Fully recommended. ”

Dr Ruy Sebastian Bonilla - Research Fellow
Oxford Materials Department

Film Sense

“We have purchased four Film Sense products for our small R&D group.  We have three FS-1 units and one FS-1EX unit with the RT300 mapping stage.  The Film Sense software is the most intuitive and easiest to use of all the ellipsometers I have experience using.  Our favorite feature is the multi-sample analysis method.   This feature allows you to determine the optical constants for new or poorly fitting films by simply measuring a small number of samples with various thicknesses.  Having knowledge of the actual thickness values is not even necessary.  The software understands the optical constants must be the same for all samples, and each sample varies only in thickness.  The user just needs to collect the data and press the fit button.  New films layers are created in just a couple of minutes.  We also love the automatic adjustment for sample height on the RT300 mapping stage.  Our process engineers are constantly adjusting the height on competitor’s units without this automatic feature.”

-Staff Systems Engineer at large semiconductor OEM

Film Sense

"The Film Sense FS-1 is a powerful and reliable tool for in-situ characterization of ALD films. The real-time dynamic thickness measurements were critical to understanding the growth characteristics of multicomponent oxides, such as lead zirconate-titanate (PZT), which I studied for my dissertation research through the University of Maryland. The in-situ thickness data I collected with the FS-1 allowed me to screen precursors much more quickly than if I had to rely on ex-situ characterization methods. I continuously used the FS-1 for over five years and haven't experienced any downtime other than during occasional realignments when switching from ex-situ to in-situ measurement modes. The FS-1 would make a valuable addition to any laboratory looking to enhance their nondestructive thin-film thickness measurement capability."

- Nicholas A Strnad, Ph. D.

Strnad, N. A. (2019). Atomic layer deposition of lead zirconate-titanate and other lead-based perovskites. (Doctoral Dissertation, University of Maryland Department of Materials Science and Engineering, College Park, USA).

Film Sense

"To summarize our nearly 5-year ownership experience of the FS-1 tool, all I can say, it’s most probably by far the highest performance/cost tool I have ever acquired in my independent research career. Besides the tool itself, as an ellipsometry expert, Film Sense has been very responsive to our data analysis/fit inquiries and saved us valuable research time by sharing his expertise. We are looking forward to getting their latest generation system with additional features that we can integrate for good on either of the reactors. Right now, our single FS-1 tool is going back-and-forth between thermal and plasma reactor based on our needs."

- Necmi Biyikli, Assistant Professor,
Electrical and Computer Engineering, University of Connecticut

Click here to learn more about how University of Connecticut
is using Film Sense Ellipsometers
as part of their research.

Film Sense

"The system (FS-XY150) is great and we are having an increase of users using it. I am happy with the system and I direct users to use it when I am training them on our ALD deposition system. It gives great results and the customer support is quick and helpful too."

- Tony Whipple, Scientist
Minnesota Nano Center

Film Sense

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