During this process, a brand new location is shaped on the interface, known as the depletion layer. A PN junction, when enclosed in the protective casing and has exterior qualified prospects for electrical connections, forms a PN junction diode. The term first appeared in the English language in 1804. At https://www.uk-exhibitionstands.co.uk/product-category/pop-ups-and-banner-stands/pop-up-walls/