Computer hard disk read / write head, SEM

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Computer hard disk read / write head, SEM

Computer hard disk read/write head. Coloured scanning electron micrograph (SEM) of the read and write electromagnetic device (head) of the hard disk of a computer. Computers store data on magnetic media, with the polarity of the magnetism (up or down) corresponding to the one or zero of computing binary code. An electromagnet (grey block, upper left) is magnetised using electricity from the wires trailing at lower left. It is then used to alter the magnetism of the disk, writing data onto it. This device also reads data from the disk. The hard disk (seen in background) rotates. The head moves radially above the disk to access all parts. Magnification: x17 at 6x7cm size

Science Photo Library features Science and Medical images including photos and illustrations

Media ID 9304139

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Bundle Bundles Computer Computers Computing Data Disc Discs Disks Drive Electric Electromagnet Electromagnetic Electromagnets Electronic Electronics Hard Disk Heads Information Magnet Magnetic Magnetism Magnets Memory Metal Metallic Metals Micrographs Read Reading Storage Storing Wire Wires Write Writing Drives

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