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Creation of the master, or template, is done using traditional photolithography techniques. The master is typically created on silicon, but can be done on any solid patterned surface.
In 1956, after tuning in to a new program, Twenty-One, he was intrigued by the questions and wrote to Dan Enright, the show's producer, asking to be a contestant.The qualifying trivia test took a grueling three-and-a-half hours; Stempel got 251 out of 363 questions right, which he claimed was the highest score ever achieved.
Stempel closed down in 1986, donating all of its type and equipment to the Darmstadt University of Technology. [2] Schriften-Service D. Stempel GmbH has possession of the matrices of Stempel, Haas , Klingspor Bros. , Deberny & Peignot , Berthold , C.E. Weber , Fonderie Olive , and the Nebiolo foundry and continues to cast their types today.