The Czochralski method as the basis of modern electronics: Jan Czochralski in 1916, while working in a laboratory in Berlin, accidentally discovered a method for creating perfectly pure crystals (monocrystals), which is the foundation of today's integrated circuits and microprocessors. Today, as much as 90% of the world's semiconductor production is based on his method. His invention is crucial to the existence of today's electronic devices, such as phones, laptops, televisions, smartphones, computers and satellites . Origin and early career in science : He was born in 1885 in Ksynia, in the Prussian partition . Although he did not graduate from college, he possessed a brilliant mind and a talent for experimentation. He developed his scientific career in Germany, working for metallurgical concerns, publishing scientific articles and implementing his inventions in industry . Return to Poland and academic activity: In 1928, he returned to Poland at the invitation of President Moscicki, where he became a professor at the Warsaw University of Technology . He established his own institute there and was involved in training engineers . Conspiratorial activities during the occupation : Although the Germans forced him to work during the occupation, Czochralski at the same time secretly helped Polish scientists and artists, cooperated with the Home Army (AK) and hid those in danger . Postwar accusation and posthumous rehabilitation : After the war ended, he was falsely accused of collaboration - without evidence, but also without mercy . The Polytechnic expelled him, and he died in oblivion in 1953. Many years after his death, documents proving his assistance to the underground were discovered, and in 2011 he was officially rehabilitated . Insufficient historical commemoration: Although Jan Czochralski is a Pole whose technology changed the world, he is hardly mentioned in schools .