Leopoldo B. Valdes

Leopoldo Benjamin Valdes was a pioneer in semiconductors. He was one of the first four recruits by William Shockley to help develop technologies at Shockley Semiconductor Laboratory.

Career During the winter of 1954–1955, William Shockley decided to seek a sponsor to help him establish production of complex transistors and his own Shockley diodes. He was initially supported by Raytheon, but the agreement was soon canceled by that company. After Shockley subsequently established Shockley Semiconductor Laboratory under the umbrella of Beckman Instruments, he recruited William W. Happ who he knew from Raytheon. Shockley's other three initial recruits were George Smoot Horsley both of whom he knew from Bell Labs, and Richard Victor Jones, He also brought lists of equipment suppliers from his prior employer, Pacific Semiconductors. Valdes, however, clashed with Shockley early on because, according to Jones, he felt he knew more than Shockley about semiconductors; he ultimately left the company after about a year.

In 1961, Valdes published a 370-page book The Physical Theory of Transistors which is cited in university level textbooks.