Apple to submit an application for a patent for rare earth magnets coating
Beijing time on July 12 in the morning news, apple has filed a patent application, the content is a method of coating of rare earth magnets for portable electronic devices into the fridge magnets and iWatch elements.
An application for a patent for the file name is "Unibody" all magnets (integration), the file points out that the standard of rare earth magnets (such as made of neodymium magnets) coating is not compatible with the appearance of the consumer electronic devices.
Neodymium magnets are usually made of iron, boron, and neodymium, and therefore need to coating, not only because the magnet is very fragile, but also because it is exposed to the air will be oxidized iron. Standard of neodymium coating has a problem, just can't with apple design aesthetics to achieve the effect of harmony. Document pointed out: "so what we want is a kind of magnets, surface coating, the coating can with the overall appearance of the equipment, shape, and feel that matches."
Patent document on how to use aluminum as the coating method is described, including the use of "diamond saw and electron discharge machining equipment" and other cutting tools for the neodymium magnet model, make its can be used for apple MacBook laptop and iPad tablet computer integrated aluminum of the specifications of the equipment shell.