Video come from a Chinese folk !!!
How does the eight tails cat become nine tails cat in the end?
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1. Let's talk about PCB--- PCB's History
1 . Let's talk about PCB--- PCB's History Juvtmall ( a company supply PCB Prototyping , PCBA service and sell kinds of components, modules and so on) Development of the methods used in modern printed circuit boards started early in the 20th century. In 1903, a German inventor, Albert Hanson, described flat foil conductors laminated to an insulating board, in multiple layers. Thomas Edison experimented with chemical methods of plating conductors onto linen paper in 1904. Arthur Berry in 1913 patented a print-and-etch method in the UK, and in the United States Max Schoop obtained a patent to flame-spray metal onto a board through a patterned mask. Charles Ducas in 1927 patented a method of electroplating circuit patterns. PCBA Service The Austrian engineer Paul Eisler invented the printed circuit as part of a radio set while working in the UK around 1936. In 1941 a multi-layer printed
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