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Imec and Buhler Leybold Enable High-throughput Manufacturing of Filter-on-chip CMOS Sensors with Unmatched Precision - Buhler Leybold Optics and imec announce that they have qualified Buhler’s HELIOS 800 tool to meet the stringent standards of the semiconductor industry and developed high performance filters for optical image sensors - BuhlerGroup.com / imec-int.com
Imec and Buhler Leybold Enable High-throughput Manufacturing of Filter-on-chip CMOS Sensors with Unmatched Precision

 

PRZOOM - /newswire/ - Leuven, Belgium, 2022/04/05 - Buhler Leybold Optics and imec announce that they have qualified Buhler’s HELIOS 800 tool to meet the stringent standards of the semiconductor industry and developed high performance filters for optical image sensors - BuhlerGroup.com / imec-int.com.

   
 
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Buhler Leybold Optics, a supplier of cutting-edge thin-film vacuum coaters and imec, a world-leading research and innovation center in nanoelectronics, announce that they have qualified Buhler’s HELIOS 800 tool to meet the stringent standards of the semiconductor industry and developed high performance filters for optical image sensors. The enhanced tool opens up many new applications that require a precise deposition of high-quality optical stacks at high manufacturing speed. The development is going to lead to a new generation of high-resolution low-cost hyperspectral imaging sensors.

The production of high-resolution low-cost filter-on-chip CMOS detectors for hyperspectral imaging sensors (HSI) for the visible (VIS) and the short-wave infrared (SWIR) range places high demands on thin-film deposition tools. A superior optical performance and low defect levels of the interference filters, combined with maximized wafer throughputs is needed. However, state-of-the-art deposition tools in semiconductor foundries lack a sufficient coating uniformity and optical performance as well as an in-situ thickness control. In the absence of such in-situ layer thickness control, the optical properties of filter stacks with up to hundreds of layers would need to be measured after the deposition of each individual layer. This dramatically reduces wafer throughput, making layer thickness corrections almost impossible.

An in-situ optical monitoring system in the HELIOS 800 Gen II sputter coater allows complex filter coatings with excellent precision in a single production step, in which batches of multiple wafers are processed. Combined with the outstanding single layer quality in terms of thickness uniformity and optical properties as well as its low defect levels, the HELIOS 800 Gen II can pave the way to the next generation of highly resolved HSI sensors.

Imec and Buhler Leybold Optics engaged in a joint development project, installing a HELIOS 800 Gen II in imec’s 200mm clean room. Within the framework of their collaboration, the HELIOS 800 Gen II was successfully upgraded to meet the extremely high standards of semiconductor manufacturing, with respect to contamination and particles levels. As a result, filters are now within the capabilities to be manufactured at high volume. Currently, imec and Buhler are collaborating to further upgrade the HELIOS 800 Gen II to enable numerous other applications and to enable processing of more complex optical filter architectures, such as photonics devices. This know-how will also be transferred to Buhler’s new sputter coater HELIOS 1200, capable to process 300mm wafers. The joint development project has been extended over the coming years, to enable the next generation of sensors and chips.

Andy Lambrechts, program director imaging technologies at imec: “Collaborating with Buhler has been of great value to imec. It enabled us to increase the quality of our hyperspectral detectors by decreasing the tolerances on the filters and facilitating more complex filter architectures. The system is available to partners for R&D projects with the support of imec in testing and qualification.”

Stephan Mingels, team leader M2M development at Buhler:: “Imec enabled Buhler to gain additional experience in front-end semiconductor processing environments. Moreover, the access to imec’s facility including high-end metrology equipment, has been crucial to optimize the performance of the HELIOS 800 Gen II.”

About Buhler Leybold Optics

With over 150 years of experience, Buhler Leybold Optics (buhlergroup.com) is a leading supplier of thin-film vacuum coating technology for a variety of applications. Our state-of-the art solutions include: precision, laser or ophthalmic optics applications, coatings for EUV/DUV lithography, patterned optical filters on active device wafers; automotive or architectural glass; coatings on flexible films for capacitors or optical applications. Leybold Optics is headquartered in Alzenau (Germany) with additional production facilities in Raleigh (USA) and Beijing (China).

About imec

Imec (imec-int.com) is a world-leading research and innovation center in nanoelectronics and digital technologies. Imec leverages its state-of-the-art R&D infrastructure and its team of more than 5,000 employees and top researchers, for R&D in advanced semiconductor and system scaling, silicon photonics, artificial intelligence, beyond 5G communications and sensing technologies, and in application domains such as health and life sciences, mobility, industry 4.0, agrofood, smart cities, sustainable energy, education, … Imec unites world-industry leaders across the semiconductor value chain, Flanders-based and international tech, pharma, medical and ICT companies, start-ups, and academia and knowledge centers. Imec is headquartered in Leuven (Belgium), and has research sites across Belgium, in the Netherlands, and the USA, and offices in China, India, Taiwan and Japan. In 2020, imec's revenue (P&L) totaled 680 million euro.

Imec is a registered trademark for the activities of imec International (IMEC International, a legal entity set up under Belgian law as a “stichting van openbaar nut”), imec Belgium (IMEC vzw supported by the Flemish Government), imec the Netherlands (Stichting IMEC Nederland), imec Taiwan (IMEC Taiwan Co.), imec China (IMEC Microelectronics (Shanghai) Co. Ltd.), imec India (IMEC India Private Limited), imec San Francisco (IMEC Inc.) and imec Florida (IMEC USA Nanoelectronics Design Center Inc.).

 
 
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Imec and Buhler Leybold Enable High-throughput Manufacturing of Filter-on-chip CMOS Sensors with Unmatched Precision

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Buhler’s HELIOS 800 | imec
Contact: Jade Liu - imec.be 
+32 16 28 16 93 jade.liu[.]imec.be
 
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