Key Milestones in CMOS Imaging
Before becoming Aptina, Micron Imaging achieved key milestones in CMOS image sensors include developing the world’s first 2.2-micron pixel architecture, pioneering 1.75-micron pixel architecture and 1.4-micron pixel architecture. As a leader in the mobile market, Micron secured designs in one of every three camera phones on the market. Similarly, the company’s high performance technology made them an early industry leader in high-speed image capture, bringing high-definition capabilities to digital still cameras and video cameras like those demonstrated in the super high definition projects for NHK (Japan Broadcasting Corporation).
Aptina’s focus on imaging expertise provides a valuable backdrop to the technology the company is working on to meet the demands of the market, now and for the future. “As technologists, we inherently look for new ways to advance imaging technology. One example is the work we’ve done in directing light within pixels. This work allows us to make higher resolution image sensors in smaller form factors which enable the user to capture high quality images from any device anywhere. Working closely with our customers assists us in understanding existing markets and finding the right technologies for new markets requiring new solutions,” says Bob Gove, President and Chief Technology Officer of Aptina. The company provides its customers with a broad range of solutions within mobile, digital still and video cameras, and industry solutions in automotive and security/surveillance. These solutions leverage the technology that Aptina has become known for, including shrinking pixels, improved pixel performance, and innovative technology.
Shrinking pixels is one of the key components in the technology integral to meeting the demand for higher resolution in consumer devices ranging from high-end mobile phones to point-and-shoot cameras and personal media video recorders. Small devices demand a small form factor which is enabled by the 1.4-micron pixel technology that Aptina announced in March of this year. Aptina’s 1.4-micron pixel technology uses a proprietary process that optimizes the amount of light being funneled into the pixel’s most sensitive area by focusing on the color filter array, the light guide and the photodiode. Using this technology, Aptina is able to produce 1.4-micron pixel high resolution image quality that outperforms today’s leading-edge 1.75-micron pixels. The pixel is based on Aptina’s new 90-nanometer copper process, which not only improves pixel performance but also reduces the physical size of the sensor, meeting the small form factor requirements of consumer devices.
Measurably Improved Pixel Performance
Aptina’s 1.4-micron pixel technology lends itself to other imaging solutions and contains elements that enhance or improve the results of larger pixels, including Aptina’s 1.75-micron pixel. By applying the 1.4-micron pixel’s optimized technology to its 1.75-micron pixel, Aptina has significantly enhanced the 1.75-micron pixel performance. Optical 3-D simulations reveal an increase in light collection and reduced optical crosstalk resulting in an overall increased level of sensitivity of 2X. The technology’s optimized light collection capabilities result in higher quality images for the consumer.
“The results we have seen with our new 1.4-micron pixel technology have inspired us to integrate these innovations into our 1.75-micron pixel products going forward,” says Terry Gilton, Vice President of Technology at Aptina. “This decision says a great deal about the advancements we have made in optimizing the pixel optical path.” Gilton adds “Innovation is the key to the future of imaging. We are exploring Backside Illumination in at least three forms and several variations on Frontside Illumination to create products that meet our customer’s needs today and moving forward.”
“Aptina is continually striving for
best-in-class image quality and continued leadership in core markets and
manufacturing excellence,” says Sandor Barna,
Vice President of Marketing at Aptina. “As
Aptina leverages its new business autonomy in the market, the company
looks to generate market disruption via growth and exploration with its
technology portfolio containing the improved 1.4-micron pixel and
enhanced 1.75-micron pixel products which will be in production the
second half of Q4, ” he adds.