William Shockley

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William Shockley
William Shockley, Stanford University.jpg
Born William Bradford Shockley Jr.
(1910-02-13)February 13, 1910
London, England
Died August 12, 1989(1989-08-12) (aged 79)
Stanford, California
Nationality American
Institutions
Alma mater
Doctoral advisor John C. Slater
Known for
Notable awards

William Bradford Shockley Jr. (February 13, 1910 – August 12, 1989) was an American physicist and inventor. Shockley was the manager of a research group that included John Bardeen and Walter Houser Brattain, the duo who invented the transistor. The three were jointly awarded the 1956 Nobel Prize in Physics.

Shockley's attempts to commercialize a new transistor design in the 1950s and 1960s led to California's "Silicon Valley" becoming a hotbed of electronics innovation. In his later life, Shockley was a professor at Stanford.[1][2]

Early life and education[edit]

Shockley was born in London, England, to American parents, and raised in his family's hometown of Palo Alto, California, from age three.[3] His father, William Hillman Shockley, was a mining engineer who speculated in mines for a living, and spoke eight languages. His mother, Mary (née Bradford), grew up in the American West, graduated from Stanford University, and became the first female US Deputy mining surveyor.[4]

Shockley received his Bachelor of Science degree from Caltech in 1932. Shockley received his Ph.D. degree from MIT in 1936. The title of his doctoral thesis was Electronic Bands in Sodium Chloride. His thesis topic was suggested by his thesis advisor, John C. Slater.[5] After receiving his doctorate, Shockley joined a research group headed by Clinton Davisson at Bell Labs in New Jersey. The next few years were productive ones for Shockley. He published a number of fundamental papers on solid state physics in Physical Review. In 1938, he got his first patent, "Electron Discharge Device", on electron multipliers.[6]

Career[edit]

When World War II broke out, Shockley became involved in radar research at the Bell labs in Manhattan, New York. In May 1942, he took leave from Bell Labs to become a research director at Columbia University's Anti-Submarine Warfare Operations Group.[7] This involved devising methods for countering the tactics of submarines with improved convoying techniques, optimizing depth charge patterns, and so on. This project required frequent trips to the Pentagon and Washington, where Shockley met many high-ranking officers and government officials. In 1944, he organized a training program for B-29 bomber pilots to use new radar bomb sights. In late 1944 he took a three-month tour to bases around the world to assess the results. For this project, Secretary of War Robert Patterson awarded Shockley the Medal for Merit on October 17, 1946.[8]

In July 1945, the War Department asked Shockley to prepare a report on the question of probable casualties from an invasion of the Japanese mainland. Shockley concluded:

If the study shows that the behavior of nations in all historical cases comparable to Japan's has in fact been invariably consistent with the behavior of the troops in battle, then it means that the Japanese dead and ineffectives at the time of the defeat will exceed the corresponding number for the Germans. In other words, we shall probably have to kill at least 5 to 10 million Japanese. This might cost us between 1.7 and 4 million casualties including 400,000 to 800,000 killed.[9]

This report influenced the decision for the atomic bombings of Hiroshima and Nagasaki to force Japan to surrender without an invasion.[10]

Shockley was first to propose a lognormal distribution to model the creation process for scientific research papers.[11] He was an atheist.[12]

Development of transistor[edit]

Shortly after the end of the war in 1945, Bell Labs formed a solid state physics group, led by Shockley and chemist Stanley Morgan, which included John Bardeen, Walter Brattain, physicist Gerald Pearson, chemist Robert Gibney, electronics expert Hilbert Moore, and several technicians. Their assignment was to seek a solid-state alternative to fragile glass vacuum tube amplifiers. Its first attempts were based on Shockley's ideas about using an external electrical field on a semiconductor to affect its conductivity. These experiments failed every time in all sorts of configurations and materials. The group was at a standstill until Bardeen suggested a theory that invoked surface states that prevented the field from penetrating the semiconductor. The group changed its focus to study these surface states and they met almost daily to discuss the work. The rapport of the group was excellent, and ideas were freely exchanged.[13]

By the winter of 1946 they had enough results that Bardeen submitted a paper on the surface states to Physical Review. Brattain started experiments to study the surface states through observations made while shining a bright light on the semiconductor's surface. This led to several more papers (one of them co-authored with Shockley), which estimated the density of the surface states to be more than enough to account for their failed experiments. The pace of the work picked up significantly when they started to surround point contacts between the semiconductor and the conducting wires with electrolytes. Moore built a circuit that allowed them to vary the frequency of the input signal easily. Finally they began to get some evidence of power amplification when Pearson, acting on a suggestion by Shockley, put a voltage on a droplet of glycol borate (a viscous chemical that did not evaporate, commonly used in electrolytic capacitors, and obtained by puncturing an example capacitor with a nail, using a hammer) placed across a P-N junction.[14]

John Bardeen, William Shockley and Walter Brattain at Bell Labs, 1948.

Bell Labs' attorneys soon discovered Shockley's field effect principle had been anticipated and devices based on it patented in 1930 by Julius Lilienfeld, who filed his MESFET-like patent in Canada on October 22, 1925.[15][16] Although the patent appeared "breakable" (it could not work) the patent attorneys based one of its four patent applications only on the Bardeen-Brattain point contact design. Three others (submitted first) covered the electrolyte-based transistors with Bardeen, Gibney and Brattain as the inventors. Shockley's name was not on any of these patent applications. This angered Shockley, who thought his name should also be on the patents because the work was based on his field effect idea. He even made efforts to have the patent written only in his name, and told Bardeen and Brattain of his intentions.[17]

Shockley, angered by not being included on the patent applications, secretly continued his own work to build a different sort of transistor based on junctions instead of point contacts; he expected this kind of design would be more likely to be commercially viable. The point contact transistor, he believed, would prove to be fragile and difficult to manufacture. Shockley was also dissatisfied with certain parts of the explanation for how the point contact transistor worked and conceived of the possibility of minority carrier injection. On February 13, 1948 another team member, John N. Shive, built a point contact transistor with bronze contacts on the front and back of thin wedge of germanium, proving that holes could diffuse through bulk germanium and not just along the surface as previously thought.[18]:153[19]:145 Shive's invention sparked[20] Shockley's invention of the junction transistor.[18]:143 A few months later he invented an entirely new, considerably more robust, type of transistor with a layer or 'sandwich' structure. This structure went on to be used for the vast majority of all transistors into the 1960s, and evolved into the bipolar junction transistor. Shockley later admitted that the workings of the team were "mixture of cooperation and competition." He also admitted that he kept some of his own work secret until his "hand was forced" by Shive's 1948 advance.[21] Shockley worked out a rather complete description of what he called the "sandwich" transistor, and a first proof of principle was obtained on April 7, 1949.

Meanwhile, Shockley worked on his magnum opus, Electrons and Holes in Semiconductors which was published as a 558-page treatise in 1950. The tome included Shockley's critical ideas of drift and diffusion and the differential equations that govern the flow of electrons in solid state crystals. Shockley's diode equation is also described. This seminal work became the reference text for other scientists working to develop and improve new variants of the transistor and other devices based on semiconductors.[22]

This resulted in his invention of the junction transistor, which was announced at a press conference on July 4, 1951.[23]

In 1951, he was elected a member of the National Academy of Sciences (NAS). He was forty-one years old; this was rather young for such an election. Two years later, he was chosen as the recipient of the prestigious Comstock Prize[24] for Physics by the NAS, and was the recipient of many other awards and honors.

The ensuing publicity generated by the "invention of the transistor" often thrust Shockley to the fore, much to the chagrin of Bardeen and Brattain. Bell Labs management, however, consistently presented all three inventors as a team. Though Shockley would correct the record where reporters gave him sole credit for the invention,[25] he eventually infuriated and alienated Bardeen and Brattain, and he essentially blocked the two from working on the junction transistor. Bardeen began pursuing a theory for superconductivity and left Bell Labs in 1951. Brattain refused to work with Shockley further and was assigned to another group. Neither Bardeen nor Brattain had much to do with the development of the transistor beyond the first year after its invention.[26]

Shockley Semiconductor[edit]

In 1956 Shockley moved from New Jersey to Mountain View, California to start Shockley Semiconductor Laboratory to live closer to his ailing mother in Palo Alto, California.[27][28] The company, a division of Beckman Instruments, Inc., was the first establishment working on silicon semiconductor devices in what came to be known as Silicon Valley.

"His way" could generally be summed up as domineering and increasingly paranoid. In one well-known incident, he claimed that a secretary's cut thumb was the result of a malicious act and he demanded lie detector tests to find the culprit.[29] After receiving the Nobel Prize in 1956, his demeanor changed as evidenced in his increasingly autocratic, erratic and hard-to-please management style.[30] In late 1957, eight of Shockley's researchers, who would come to be known as the "traitorous eight", resigned after Shockley decided not to continue research into silicon-based semiconductors.[31] They went on to form Fairchild Semiconductor, a loss from which Shockley Semiconductor never recovered. Over the course of 20 years, these eight of Shockley's former employees started 65 new enterprises.[32]

Personal life[edit]

Marriage and children[edit]

While still a student, Shockley married Iowan Jean Bailey in August 1933. In March 1934, the couple had a baby girl, Alison. He became an accomplished rock climber, going often to the Shawangunks in the Hudson River Valley, where he pioneered a route across an overhang, known to this day as "Shockley's Ceiling."[14]

Shockley was popular as speaker, lecturer, and an amateur magician. He once 'magically' produced a bouquet of roses at the end of his address before the American Physical Society. He was also known in his early years for his elaborate practical jokes.[33]

Later years[edit]

When Shockley was eased out of the directorship of Shockley Semiconductor, he joined Stanford University, where in 1963 he was appointed the Alexander M. Poniatoff Professor of Engineering and Applied Science, in which position he remained until his retirement as professor emeritus in 1975.[34]

Death[edit]

Shockley died in 1989 of prostate cancer.[35] By the time of his death he was almost completely estranged from most of his friends and family, except his wife who died in 2007. His children are reported to have learned of his death only through the print media.[36]

Honors[edit]

Patents[edit]

Shockley was granted over ninety US patents. Some notable ones are:

  • US 2502488  Semiconductor Amplifier. Apr. 4, 1950; his first granted patent involving transistors.
  • US 2569347  Circuit element utilizing semiconductive material. Sept. 25, 1951; His earliest applied for (June 26, 1948) patent involving transistors.
  • US 2655609  Bistable Circuits. Oct. 13, 1953; Used in computers.
  • US 2787564  Forming Semiconductive Devices by Ionic Bombardment. Apr. 2, 1957; The diffusion process for implantation of impurities.
  • US 3031275  Process for Growing Single Crystals. Apr. 24, 1962; Improvements on process for production of basic materials.
  • US 3053635  Method of Growing Silicon Carbide Crystals. Sept. 11, 1962; Exploring other semiconductors.

Bibliography[edit]

Prewar scientific articles by Shockley[edit]

  • An Electron Microscope for Filaments: Emission and Adsorption by Tungsten Single Crystals, R. P. Johnson and W. Shockley, Phys. Rev. 49, 436 - 440 (1936) doi:10.1103/PhysRev.49.436
  • Optical Absorption by the Alkali Halides, J. C. Slater and W. Shockley, Phys. Rev. 50, 705 - 719 (1936) doi:10.1103/PhysRev.50.705
  • Electronic Energy Bands in Sodium Chloride, William Shockley, Phys. Rev. 50, 754 - 759 (1936) doi:10.1103/PhysRev.50.754
  • The Empty Lattice Test of the Cellular Method in Solids, W. Shockley, Phys. Rev. 52, 866 - 872 (1937) doi:10.1103/PhysRev.52.866
  • On the Surface States Associated with a Periodic Potential, William Shockley, Phys. Rev. 56, 317 - 323 (1939) doi:10.1103/PhysRev.56.317
  • The Self-Diffusion of Copper, J. Steigman, W. Shockley and F. C. Nix, Phys. Rev. 56, 13 - 21 (1939) doi:10.1103/PhysRev.56.13

Books by Shockley[edit]

  • Shockley, William – Electrons and holes in semiconductors, with applications to transistor electronics, Krieger (1956) ISBN 0-88275-382-7.
  • Shockley, William and Gong, Walter A – Mechanics Charles E. Merrill, Inc. (1966).
  • Shockley, William and Pearson, Roger – Shockley on Eugenics and Race: The Application of Science to the Solution of Human Problems Scott-Townsend (1992) ISBN 1-878465-03-1.

Further reading[edit]

Notes[edit]

  1. ^ Saxon 1989
  2. ^ Sparks, Hogan & Linville 1991, pp. 130–132
  3. ^ http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=04050875
  4. ^ Shurkin 2006, p. 5
  5. ^ Shurkin 2006, pp. 38–39
  6. ^ Shurkin 2006, p. 48
  7. ^ Broken Genius p. 65–67
  8. ^ a b Shurkin 2006, p. 85
  9. ^ Giangreco 1997, p. 568
  10. ^ Newman, Robert P. (1998). "Hiroshima and the Trashing of Henry Stimson". The New England Quarterly 71 (1): 27. doi:10.2307/366722. 
  11. ^ The Artful Universe by John D. Barrow, Clarendon Press, Oxford, 1995, p. 239
  12. ^ Crystal Fire p. 133
  13. ^ Brattain quoted in Crystal Fire p. 127
  14. ^ a b Crystal Fire p.132
  15. ^ US 1745175  "Method and apparatus for controlling electric current" first filing in Canada on 22.10.1925
  16. ^ Lilienfeld[dead link]Archive copy at the Wayback Machine
  17. ^ "William Shockley". IEEE Global History Network. IEEE. Retrieved 18 July 2011. 
  18. ^ a b Michael Riordan and Lillian Hoddeson. Crystal Fire: The Invention of the Transistor and the Birth of the Information Age. ISBN 978-0-393-31851-7. 
  19. ^ Hoddeson, Lillian; Daitch, Vicki (2002). True Genius: The Life and Science of John Bardeen : the Only Winner of Two Nobel Prizes in Physics. Joseph Henry Press. ISBN 0-309-08408-3. Retrieved 30 December 2014. Lay summaryAmerican Scientist (30 December 2014). 
  20. ^ Brittain 1984, p. 1695 "an observation that William Shockley interpreted as confirmation of his concept of that junction transistor"
  21. ^ "Inventors of the transistor followed diverse paths after 1947 discovery". Associated press - Bangor Daily news. December 25, 1987. Retrieved May 6, 2012. 'mixture of cooperation and competition' and 'Shockley, eager to make his own contribution, said he kept some of his own work secret until "my hand was forced" in early 1948 by an advance reported by John Shive, another Bell Laboratories researcher' 
  22. ^ Broken Genius, p 121-122
  23. ^ "1951 - First Grown-Junction Transistors Fabricated". Computer History Museum. 2007. Retrieved 3 July 2013. 
  24. ^ Comstock Prize
  25. ^ http://www.pbs.org/transistor/album1/shockley/shockley3.html
  26. ^ Crystal Fire p. 278
  27. ^ "Holding On". New York Times. April 6, 2008. Retrieved 2014-12-07. In 1955, the physicist William Shockley set up a semiconductor laboratory in Mountain View, partly to be near his mother in Palo Alto. ... 
  28. ^ "Two Views of Innovation, Colliding in Washington". New York Times. January 13, 2008. Retrieved 2014-12-07. The co-inventor of the transistor and the founder of the valley's first chip company, William Shockley, moved to Palo Alto, Calif., because his mother lived there. ... 
  29. ^ Crystal Fire p. 247
  30. ^ PBS program - American Experience (2012) 'Silicon Valley'
  31. ^ Goodheart & 2006 "Fed up with their boss, eight lab workers walked off the job on this day in Mountain View, Calif. Their employer, William Shockley, had decided not to continue research into silicon-based semiconductors; frustrated, they decided to undertake the work on their own. The researchers — who would become known as 'the traitorous eight' — went on to invent the microprocessor (and to found Intel, among other companies).
  32. ^ A Legal Bridge Spanning 100 Years: From the Gold Mines of El Dorado to the "Golden" Startups of Silicon Valley by Gregory Gromov
  33. ^ Crystal Fire p. 45
  34. ^ Crystal Fire p.277
  35. ^ "William B. Shockley, 79, Creator of Transistor and Theory on Race". New York Times. 14 August 1989. Retrieved 2007-07-21. He drew further scorn when he proposed financial rewards for the genetically disadvantaged if they volunteered for sterilization. 
  36. ^ ScienCentral, Inc., and The American Institute of Physics (1999). "William Shockley (Part 3 of 3): Confusion over Credit". Retrieved 1 January 2015. 
  37. ^ "Comstock Prize in Physics". National Academy of Sciences. Retrieved 13 February 2011. 

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Other notes[edit]

References[edit]

External links[edit]