10μm pitch design of<i>HgCdTe</i>diode array in Sofradir

Péré‐Laperne, Nicolas; Rubaldo, L.; Kerlain, A.; Carrère, Emmanuel; Dargent, L.; Taalat, R.; Berthoz, Jocelyn

doi:10.1117/12.2075388

Cited by 6 publications

(4 citation statements)

References 11 publications

(15 reference statements)

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“…Second, this process is challenging for small pixel pitches. Existing cameras have a 15 μm pitch, and the trend is to reduce this size by approximately 10 μm . This value is considerably larger than that achieved for CMOS visible sensors, for which pixel pitches of 2 μm are commonly used.…”

Section: Photoconduction and Ir Detectionmentioning

confidence: 95%

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Mercury Chalcogenide Quantum Dots: Material Perspective for Device Integration

et al. 2021

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Nanocrystals (NCs) are one of the few nanotechnologies to have attained mass market applications with their use as light sources for displays. This success relies on Cd-and In-based wide bandgap materials. NCs are likely to be employed in more applications as they provide a versatile platform for optoelectronics, specifically, infrared optoelectronics. The existing material technologies in this range of wavelengths are generally not cost effective, which limits the spread of technologies beyond a few niche domains, such as defense and astronomy. Among the potential candidates to address the infrared window, mercury chalcogenide (HgX) NCs exhibit the highest potential in terms of performance. In this review, we discuss how material developments have facilitated device enhancements. Because such NCs are primarily used because of their infrared optical features, we first review the strategies for the associated colloidal growth and electronic structure. The review is organized considering three main device-related applications: light emission, electronic transport and infrared photodetection.

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Section: Photoconduction and Ir Detectionmentioning

confidence: 95%

“…Existing cameras have a 15 μm pitch, and the trend is to reduce this size by approximately 10 μm. 394 This value is considerably larger than that achieved for CMOS visible sensors, for which pixel pitches of 2 μm are commonly used. Thus, the quality of the SWIR image is not diffraction limited.…”

Section: Integration and Imagingmentioning

confidence: 99%

Mercury Chalcogenide Quantum Dots: Material Perspective for Device Integration

et al. 2021

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“…The FPA has been optimized to reduce crosstalk and increase MTF values at Nyquist frequency [8]. Figure 7 presents the MTF for three different devices named A, B and C. Device A represents the standard technology and device B is the geometrically optimized diode for dark current reduction, while Device C illustrates the latest development where all parameters of the design are optimized to achieve the best MTF without degrading the other FOM.…”

Section: Modulation Transfer Function (Mtf)mentioning

confidence: 99%

Update on 10μm pixel pitch MCT-based focal plane array with enhanced functionalities

et al. 2015

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Sofradir was first to show a 10µm focal plane array (FPA) in DSS 2012, and announced the DAPHNIS 10µm product family back in 2014. This pixel pitch is key for enabling more compact sensors and increased resolution. SOFRADIR recently achieved outstanding MTF demonstration at this pixel pitch, which clearly demonstrate the benefit to users of adopting 10µm pixel pitch focal plane array based detectors. The last results, and associated gain in detection performance, are discussed in this paper.Concurrently to pitch downsizing, SOFRADIR also works on a global offer using digital interfaces and smart pixel functionalities. This opens the road to enhanced functionalities such as improved image quality, higher frame rate, lower power consumption and optimum operation for wide thermal conditions scenes. This paper also discusses these enhanced features and strategies allowing easier integration of the detector in the system.

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“…Following the path used for 10µm pitch II-VI technology [11], consisting in maximising collection volume and minimizing diffusion volume, while maintaining high quantum efficiency and low temporal and spatial noise, outstanding MTF performances have been obtained for II-VI SXGA FPA as illustrated below. In good agreement with previous projections [12], MTF around 0.5 at Nyquist Frequency has been obtained on optimized photodiode design.…”

Section: Mtf Performancesmentioning

confidence: 99%

Sub-10μm pitch HOT technologies development at Lynred

Rubaldo¹,

Péré‐Laperne²,

Brunner³

et al. 2023

Infrared Technology and Applications XLIX

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LYNRED is oriented towards excellence in II-VI, III-V and bolometers technologies, covering all Society’s needs in term of infrared detection. Our vision is to preserve and protect, and more than ever, our goal is to provide the right technology to the field missions, spatial and industrial applications, and more generally the right technology to customers’ needs. For this purpose we are developing for the next generation pitch, MCT HOT technology, for extended MW band as well as III-V HOT MW blue band technology. Many challenges have to be addressed for future small pitch, large format and HOT detectors. Electrical and optical crosstalks as well as image quality and stability, are one of the prime concern for detectors with pixel pitch below 10μm. We will discuss about the trade-off between the different material properties and detector performances to ensure mandatory minimization of Minimum Resolvable Temperature Difference (MRTD) for range optimization. We will then review latest 7.5μm pitch development at LYNRED, with SXGA formats, based on II-VI and III-V HOT materials, in terms of operability, residual fixed pattern noise (RFPN) and Modulation Transfer Function (MTF) optimizations.

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10μm pitch design ofHgCdTediode array in Sofradir

Cited by 6 publications

References 11 publications

Mercury Chalcogenide Quantum Dots: Material Perspective for Device Integration

Mercury Chalcogenide Quantum Dots: Material Perspective for Device Integration

Update on 10μm pixel pitch MCT-based focal plane array with enhanced functionalities

Sub-10μm pitch HOT technologies development at Lynred

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