The world's smallest Christmas card fits 200 million times on a stamp

photo source: gva

British scientists just managed to make the smallest Christmas card just before the end of the year celebrations, using high-tech techniques. The tiny thing measures only fifteen by twenty micrometers, can not be seen with the naked eye and is therefore certainly not suitable for putting on the cupboard. But the techniques that were used for it are creating groundbreaking new technologies. 

The British scientists made the postcard with silicon nitride, a chemical compound between silicon and nitrogen with which they make a hard, ceramic material. Then they wrote down a festive message and signed a picture with a hypermodern, concentrated ionizing ray. The gem fits more than 200 million times on a regular stamp and a letterbox full of these cards would be enough to send everyone around the world about 900,000 Christmas wishes. The instruments with which the high-tech Christmas card was used are mainly used to carry out groundbreaking research to develop new batteries and other technologies.


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