Now, over ten years have passed since its first commercialization, and it is still used for a wide variety of applications. 2System Solutions Business Div.Sony Semiconductor Solutions Corporation. In addition to making the development of tiny cameras with AI functionality possible, these image sensors are expected to enable various applications in the retail and industrial equipment industries, and combined with cloud computing, will contribute to realizing optimal systems. ──What are the back-illuminated CAPD’s advantages and applications? Sony is additionally aiming for a picture sensor which will be ready to capture and express surprise and emotion, Creating a world filled with emotion. It was a difficult journey, but Sony became the first in the world to achieve mass production. left: Front-illuminated structure / right: Back-illuminated structure. However, there were few products that used AI at the time, and it was unclear what kinds of features were expected. Using the evidence gathered during development, the validity of the process is demonstrated with the aim of establishing a firm position as a reliable supplier in the industry while being assessed and audited by customers. Sony CMOS Image Sensor – Beginning with their adoption of cellular phones back in 2002, Sony’s CMOS sensors for megapixel class camera cell phones and digital high definition video cameras became widely utilized in commercial products. The new image sensor features an original Sony pixel structure and exposure method that delivers an HDR function capable of 120dB. Sony Semiconductor Solutions Corporation. We had to modify our original DSP plan over and over again before we were able to complete the intelligent image sensors. SWIR stands for "Short Wavelength Infra-Red." Revised on February 1, 2019 Later, it became a platform technology for different types of sensors bringing about a variety of benefits including higher speed, lower power consumption, expanded functionality, lower costs, and improved productivity. left: Conventional Back-illuminated CMOS image sensor / right: Newly-developed Stacked CMOS image sensor. As the goal of the development was to produce an image sensor that could be mass-produced for cameras on mobile devices, I concluded that wafer-on-wafer bonding technology was the only solution. Furthermore, our products meet the requirements of the AEC-Q100 automotive electronic component reliability tests. During the development, issues that we had never experienced before cropped up, including chips breaking while under evaluation, but we worked with each other and brought them to completion. Exmor Ris a back-illuminatedversion of Sony's CMOS image sensor. Umebayashi: Due to its small size and high functionality, it was initially used in smartphone cameras for its ability to capture clear photos against strong backlight. 3, Research Div. and is now putting efforts into a Sony CMOS Image Sensor that can do exactly that. You might wonder why Sony was the first to develop it, but I think the key lies in the integration of technologies including the latest ones with those we had built up in CCD. Yoshihisa Kagawa: This technology adds Cu-connection pads to the lower circuit chip and upper pixel chip of stacked CMOS image sensors to simultaneously establish physical and electrical connections. This delivers the highest sensitivity, approximately 1.5x that of conventional*3 image sensors for 2.0 megapixel class automotive cameras (according to Sony research). The upper limit is currently around 125℃. Sony will begin shipping samples in May 2017. Dept. Even though image quality will improve as you increase the quantity of data you capture, until now, the still image quality of images has been improved by spatial resolution increases. Eki: Extracting only the necessary data can reduce data transmission latency and power consumption of the camera and address privacy concerns when using cloud services. Revised on February 28, 2018 Realizing the future full of emotion with the next generation of creators. Create new values through the power of design. It is used for face recognition in smartphones, features related to AR and VR, and autonomous robots and drones. This world-first technology rearranges the pixel and circuit sections, which were previously placed on the same silicon chip, into two separate layers. The back-illuminated structure matches the stacking structure well and is capable of adapting to technological advancements. ──What was difficult about entering the automotive industry? We developed systems such as software that can generate smooth depth images, small module designs, and highly efficient laser drivers. Yohtaro Yasu: With ToF (Time of Flight) image sensors, depth information is acquired by measuring the time it takes for an emitted light pulse to reflect and return to the sensor surface. IMX390CQV CMOS image sensor for automotive cameras, Mass-production shipments to commence in August 2018. Development of back-illuminated CAPD uncovered synergies with Sony’s device and circuit technology. If anything is often said about Sony technology, it would be to never doubt it. Although a transition from CCD to CMOS image sensors was occurring for certain applications, the image quality of front-illuminated CMOS image sensors had room for improvement, and the transition itself brought up a number of issues. More recently, this structure has been adopted for ToF (Time of Flight) image sensors and has become the standard structure for CMOS image sensors. 7, Research Div. Eki: The biggest reason is that Sony already had the foundations of the development in place when we started planning. Sony’s PurposeFill the world with emotion,through the power of creativity and This allowed us to be the first in the world to commercialize a back-illuminated CMOS image sensor. Here recently, the trend towards higher pixel counts in consumer digital cameras have continued, and now it’s possible to require high resolution still images conveniently. For the next generation. technology. In conventional front-illuminated CMOS image sensors, there is wiring that connects the various elements on the light incident surface. The pixel chip is back-illuminated, and the logic chip has a number of features in addition to the conventional image sensor operation circuit, such as Sony’s original DSP (Digital Signal Processor) and memory to store the AI model of users’ choice. In addition to image sensors, this collaboration between the two companies from Belgium and Japan also contributed to securing the iToF businesses. Sony is now developing high-speed CMOS sensors for digital cameras which will provide continuous imaging from all pixels at an amazing frame rate of 60 frames. The STARVIS is back-illuminated pixel technology used in CMOS image sensors for surveillance camera applications. Sample comparison movies: Simultaneous LED flicker mitigation and HDR functions (Left), HDR function only (Right). Umebayashi: There were two major issues in planning the project. In the automotive industry, there are many international standards related to the product development process, which itself must also be refined along with the product in line with industry-wide standards. The amount of data however are often increased not only by spatial resolution increases but also by increasing the quantity of data within the time direction also. CMOS Image Sensor with Column-parallel A/D conversion circuit Sony always keeps innovating on the image sensor after Sony has put CCD out into the world. It is fair to say that developing the back-illuminated structure, which enables high image quality, accelerated the transition to CMOS image sensors. In the industry, the back-illuminated style was thought of as an ideal but difficult structure to realize from a technology standpoint. There are various types of ToF, and we focused on developing an indirect-ToF (iToF) method that works by measuring the phase delay of returning light after it has been reflected by the target object. AI models can be rewritten and updated with the latest AI models to match various system environments and conditions. They cannot be located in the pixel area because of this penetration and require dedicated spaces.