Friday, October 21, 2016
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
Razer Unveils The New Razer Blade Pro Gaming Notebook
Nintendo NX Will Be Called Switch, Coming In March 2017
Samsung Could Use LG Chem batteries For Future Smartphones
Yahoo Asks U.S. Intelligence Authorities To Explain Email Scanning Order
Chinese LeEco Showcases TV, Smartphone And Self-driving Car In San Francisco
Fujitsu Develops New Architecture that Rivals Quantum Computers
Acer 24-Inch WQHD Predator Monitor Features ZeroFrame Design, 144Hz Refresh Rate With up to 165Hz Overclocking
Kodak Releases The KODAKEKTRA Smartphone Camera Hybrid
Active Discussions
Which of these DVD media are the best, most durable?
How to back up a PS2 DL game
Copy a protected DVD?
roxio issues with xp pro
Help make DVDInfoPro better with dvdinfomantis!!!
menu making
Optiarc AD-7260S review
cdrw trouble
 Home > News > Digital Cameras > New Son...
Last 7 Days News : SU MO TU WE TH FR SA All News

Wednesday, June 11, 2008
New Sony CMOS Image Sensor Features Double Sensitivity, Less Noise

Sony developed a back-illuminated CMOS image sensor for with significantly enhanced imaging characteristics, including nearly twofold sensitivity and low noise.

This improved performance has been achieved by illuminating the backside of the silicon substrate, in contrast to conventional CMOS image sensors based on front-illumination technology.

The newly developed CMOS image sensor achieves a signal-to-noise ratio of +8dB (+6dB sensitivity, -2dB noise) in comparison to existing Sony CMOS image sensors of the same pixel size. Sony said that it would apply this back-illuminated CMOS technology in consumer digital video camcorders and digital still cameras.

Conventionally, consumer digital video camcorders and digital still cameras have been required to combine high resolution and miniaturization oriented to portability. In order to meet these needs, image sensor development has focused on miniaturizing pixel size, while maintaining imaging characteristics. However, in addition to these ongoing requirements, in recent years demand for improved levels of minimum subject illuminance and rapid image capture has also increased. This has led to the requirement of image sensors with improved signal-to-noise ratio and other features capable of realizing improved overall picture quality.

Sony has retained the advantages of CMOS image sensors such as low power consumption and high-speed operation, while radically realigning their fundamental pixel structure from front-illumination to back-illumination to successfully develop a prototype, back-illuminated CMOS image sensor (pixel size: 1.75?m square pixels, five effective mega pixels, 60 frames/s) with improved sensitivity and noise reduction - the key factors to enhancing image quality.

With a conventional front-illumination structure, the metal wiring and transistors on the surface of the silicon substrate that form the sensor's light-sensitive area (photo-diode) impede photon gathering carried out by the on-chip lens, and this has also been an important issue in the miniaturization of pixels and widening optical angle response.

A back-illuminated structure minimizes the degradation of sensitivity to optical angle response, while also increasing the amount of light that enters each pixel due to the lack of obstacles such as metal wiring and transistors that have been moved to the reverse of the silicon substrate.

However, compared to conventional front-illuminated structures, back-illuminated structures commonly cause problems such as noise, dark current, defective pixels and color mixture that lead to image degradation and also cause a decrease in the signal-to-noise ratio.

To overcome this Sony has newly developed a unique photo-diode structure and on-chip lens optimized for back-illuminated structures, that achieves a higher sensitivity of +6dB and a lower random noise of -2dB without light by reducing noise, dark current and defect pixels compared to the conventional front-illuminated structure. Additionally, Sony's technologies such as high-precision alignment have addressed any color mixture problems.

Furthermore, the back-illuminated structure also expands device potential in areas such as speed and dynamic range by enabling multiple metal wiring layers and greater flexibility in the transistor structure.

Sony plans to continue its development of image sensors that combine advanced image quality and cutting-edge pixel miniaturization.

Internet Providers to Block Child Porn Sites        All News        Toshiba's New 1.8-inch HDD Achieves 160GB
New RICOH GX200 With 12 megapixel CCD     Digital Cameras News      Canon EOS 1000D / Rebel XS: gateway to full EOS power

Get RSS feed Easy Print E-Mail this Message

Related News
Sony To Release Smartphone Games in 2018
New Sony Compact RX100 V And A6500 Flagship Cameras Released
SK Hynix to Expand Production Of Image Sensors At New 300mm Factories
New Sony Flagship 4K and HD Action Cams Support Image Stabilization
Sony Unveils Its New Products at IFA 2016
Sony Unveils 4K Movie Streaming Service For PCs
Games Outweigh Sagging Sensors For Sony
New Sony 4K Ultra HD TVs Released In The U.S.
Sony Ups Sales Goals For Games Ahead of VR Launch
Sony Recalls VAIO Laptop Computer Battery Packs
Sony Xperia X Series Coming to the United States
Sony Sees Flat Annual Growth Due To Recent Quake Damages

Most Popular News
Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2016 - All rights reserved -
Privacy policy - Contact Us .