Form： laoyaoba.com 2018/3/8 Browse：2773 Keywords: Technology electronics electronics sensors integrated circuits processors semiconductors devices innovative integrated circuits microelectronics semiconductors IC mobile phones
Quantum technology opens up new avenues for the miniaturization of electronic components. Recently, the Fraunhofer Institute for Solid State Physics (IAF) and the Maple Institute for Solid State Research published information that their scientists have jointly developed a quantum sensor that can be used to measure micro magnetic fields such as hard disk magnetic fields and the human brain. Radio waves.
As integrated circuits become more complex, a current Pentium processor can hold about 30 million transistors, so the magnetic structure of the hard disk can be recognized only in the range of 10 to 20 nanometers, which is smaller than the 80 to 120 nanometer-meter flu virus. The order of magnitude is only accessible to quantum physics. The newly developed quantum sensors accurately measure these tiny magnetic fields for future hard drives. The new quantum sensor has only the size of nitrogen atoms, and it is a synthetic diamond as a carrier material. Diamond has good mechanical and chemical stability as well as superior thermal conductivity. The crystal can be made into a semiconductor by introducing foreign atoms such as boron and phosphorus, and is very suitable for optical circuits.
IAF researchers in recent decades to develop and optimize the equipment used to produce diamond, a special oval plasma reactor mold. At a high temperature of 800-900 degrees Celsius, a diamond layer can be grown from the introduction of methane gas and hydrogen gas on a diamond substrate, and a crystal with a length of 3-8 mm is peeled from the substrate and polished, and finally manufactured to have a quantum physical use. Pure carbon crystal stable isotope C12 pure crystal diamond. Methane gas used by the zirconium filter purification, hydrogen purification by other means.
There are two ways researchers can make magnetic field detectors: implanting a single nitrogen atom directly or adding nitrogen at the very last step of making a diamond. After that, in the clean room using oxygen plasma etching method can produce a similar atomic force microscope slender diamond tip. The key points are the introduced nitrogen atoms and the adjacent vacancies in the lattice. The nitrogen vacancy center is the actual sensor that emits light when irradiated with laser and microwaves. The emitted light can vary with the intensity of the magnetic field in the vicinity. Experts compare this innovation to Optical Resonance Magnetic Resonance (ODMR).
This sensor can not only accurately detect the magnetic field at the nanometer level, but also determine its strength and its application potential is astonishing. For example, you can monitor the quality of your hard drive, detect small errors in densely stored data, and find faulty pieces of data to remove before writing and reading. Therefore, it is possible to reduce waste that rapidly increases with the acceleration of miniaturization and reduce production costs. According to IAF experts, this quantum sensor can also be used to measure many weak magnetic fields, including brain waves. Not only is it more accurate than current brainwave sensors, it is also available at room temperature without the need for liquid nitrogen cooling.