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Zheng You p ?: Distinguished leaders, ladies and gentlemen, Good morning, I am honored to be invited to make a research report at today's forum. My report entitled "Semiconductor Technology in the Big Data Era." We all know that with the rapid development of information technology in recent years, the intelligent development of information and the high development of networking, especially the development of the mobile Internet and the Internet of Things, have brought about a high degree of integration in the ternary world of people, machines and things. For example, in 2011 the amount of data copied and created globally was 1.8ZB, far exceeding the total data of all printed materials in human history. If you burn 1.8ZB of data to a normal DVD disc, the height of the disc will add up to a half and a half from Earth to the Moon, which is about 720,000 miles.
We know about 10 years ago, we think the information may enter the KB, we can imagine how fast the current information technology development. These data are not information, but a strategic resource. Use data resources to discover knowledge, improve efficiency and promote innovation, making it a service for state governance, scientific research, technological development and business decision-making and even personal life. Big Data Leads to Information Storm is revolutionizing our lives, our work and our thinking, and big data is beginning a major transformation. Therefore, big data is the concentrated reflection of the new generation of information technology and the main feature of the new generation of information technology.
As a new generation of information technology, especially as a semiconductor technology of information technology, big data brings a good historical development opportunity and poses a serious challenge to semiconductor technology. A new generation of big data technology must meet the green energy-saving development. Conform to the global energy-saving emission reduction needs of the times, all walks of life must energy-saving emission reduction. The sustainable development of information technology itself must be energy saving, which is in line with the scientific needs of the information science itself.
In 2007, the equivalent of computer-generated CO2 emissions in the United Kingdom was as good as the aircraft for the climate. The computers in the world are in normal operation and the emissions to the atmosphere every day are about 35 million tons. Equivalent to 1 million flights into and out of the United Kingdom brought emissions, energy saving information technology is very important. Big data information technology three major technical facilities; data center server, wireless network base station, mobile terminal platform. The development of modern information technology, mainly hardware from the three infrastructure. Now it can be said that many IT companies are running around these three aspects, so that the three basic energy-saving emission reduction is very crucial.
Data center servers are the infrastructure of the information age. According to the statistics, the amount of data generated on Weibo in 1 minute is more than 100,000, the number of page views in Facebook exceeds 6 million in one minute, and the world has 1700TB of information per minute. The data center is not a repository for creating warehouses, it needs to be up and running, and it needs a lot of power. In 2008, the power consumption of Google server system was close to 1000 MW. In 2008, the power consumption of the three major operators such as China Mobile was 23.1 billion kWh.
Data center power consumption is the largest power conversion, is AC-BD power conversion. In front of the conversion efficiency is generally 60-65%, outside the energy consumption is converted to heat Safa out of these extra heat must rely on the cooling equipment cooling. The energy consumption of refrigeration equipment accounted for 45% of the total energy consumption, IT core equipment accounted for 30% of energy consumption, system distribution accounted for 24%, the server's power consumption is very large. How to reduce the energy consumption of data center servers is a key issue for the sustainable development of the data center. As data in the data center increases, it will cost you money in the future.
With the wide application of big data in various fields, the demand for data center keeps increasing. As a result, data center power consumption accounts for 8% of the world's total power consumption, and the electricity consumption is expected to double. The huge demand for power in the data center has become the bottleneck that restricts the development of big data technology. In other words, reducing coagulation is the most serious challenge to the sustainable development of big data technology.
For more than half a century, Silicon Power Electronics , which underpin power system development, has faced silicon's "material limits" that have made it difficult to meet the energy-saving needs of a huge energy infrastructure such as a data center server. The third generation of semiconductor material is a new generation of electronic and electronic devices with low switching loss and high temperature resistance, which is a revolution of traditional power electronics technology. Compared with the traditional silicon devices, using the third generation semiconductor material SIC, GaN, the device is expected to reduce energy consumption by 50%, but also work in high-limit ambient temperature. Therefore, the cooling cost of the basic equipment can be greatly saved, and the size and size of the equipment can be effectively used. The switching time of SiC and GaN devices is 2-3 times higher than that of Si-IGBT, which will reduce the capacitance and inductance of the passive components and increase the frequency and see the transformer 's size and weight, thus reducing the size and weight of the device.
Mobile Internet base stations are the infrastructure for wireless communications. Base station power amplification is the most power-hungry device in wireless communication systems. It consumes nearly 80% of the electrical power of the system, and only 10% is used for the signal transmission. Base station energy consumption is very large, consume it will be fever, you need to cool. With the current frequency of unlimited communications, from 2G to 4G stride immediately, 4G coverage rate of only 1/16 of 2G, so we must increase power consumption. If you want to increase the power consumption of 4G will consume electricity, the rapid development of unlimited information technology led to the rapid rise of energy consumption and increasing electromagnetic radiation constitute the main challenges confronting the sustainable development of unlimited information technology. Si-LDMOS operating voltage is only 28V, unlimited base station electronic systems generally require an operating voltage of 48V, this must rely on multi-stage conversion circuit to boost the power voltage.
GaN RF power devices can work at 50V, eliminating the power loss caused by the conversion circuit, so that GaN devices to replace the Si-LDMOS device for the base station power amplifier, the efficiency can be increased 2-4 times. Therefore, it can provide higher transmission rate under the condition of unchanged base station, and does not need strong air cooling and can be installed outdoors. Intelligent mobile terminals are the fastest growing in recent years, and occupy the largest market in the industry. Flat panel display is the window of human-computer contact and information display. Without information technology, there is no modern information technology, because your information can not be expressed. Therefore, the mobile terminal information display is very important, the current mobile terminal display mainly by liquid crystal display. Smart phones and tablets in the information of the mobile terminal is not talking on the phone, not texting, but a platform for information processing. Almost all of the information functions can be transferred to the platform through the Internet to complete. So in the future can handle office affairs everywhere, you can move. This situation requires ultra-high power consumption, and development capabilities. The IGZO wide bandgap semiconductor material that has emerged in recent years as a TFT driver has greatly reduced power consumption. At present, the average power consumption of smart mobile devices such as iPads and iPhones, as well as the average energy consumption of display system (CPU + hard disk, etc.) is 1: 1. Using IGZO, personal computers will save 25% The working terminal is very important.
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