Electronics
Karl Ferdinand Braun developed the crystal detector in 1874, marking the first semiconductor device ever created. Sir Joseph John Thomson identified the electron in 1897, establishing the particle that electronics would eventually control. Lee De Forest invented the triode in the early 1900s to amplify small electrical signals from radio antennas. This invention made long-distance telephony and commercial radio broadcasting practical by the 1920s. Vacuum tubes controlled current flow by influencing individual electrons within a glass envelope. These thermionic valves enabled the construction of equipment for television, radar, and music recording. By the middle of the 1980s, vacuum tubes still played a leading role in microwave transmission and high power applications. Specialized audio equipment and guitar amplifiers continue to use these components today.
John Bardeen and Walter Houser Brattain invented the first working point-contact transistor at Bell Labs in 1947. Thomas J. Watson Jr. ordered all future IBM products to use transistors after April 1955 when the IBM 608 calculator launched. The IBM 608 contained more than 3,000 germanium transistors without any vacuum tubes. Early junction transistors were bulky devices difficult to manufacture on a mass-production basis. The MOSFET was invented at Bell Labs between 1955 and 1960 as a truly compact alternative. Its advantages included high scalability, affordability, low power consumption, and high density. An estimated 13 sextillion MOSFETs have been manufactured between 1960 and 2018 alone. This device became the most widely used electronic component in the world.
Jack Kilby and Robert Noyce solved circuit size problems by integrating all components onto a single-crystal silicon wafer. Small-scale integration emerged in the early 1960s followed by medium-scale integration in the late 1960s. VLSI technology allowed circuits to be made smaller while automating the manufacturing process. By 2008, billion-transistor processors became commercially available for widespread use. Complex computer circuits required speed that large components could not provide due to long interconnecting wires. Electric signals took time to travel through these lengthy paths, slowing down processing speeds. Modern electronics rely on monolithic blocks of semiconductor material to eliminate these delays. Printed circuit boards now mount components using surface mount or through-hole techniques.
Analog circuits utilize a continuous range of voltage or current for signal processing operations. Digital circuits operate based on discrete voltage levels labeled as logic zero and logic one. Boolean algebra forms the basis of all digital computers and microprocessor devices. Many functions once performed by analog circuits are now digitized into hybrid approaches. A voltage comparator receives a continuous range but outputs only two distinct levels like a digital switch. Some systems define logic zero as high voltage while others reverse this definition arbitrarily. Ternary logic with three states has been studied but never gained significant practical acceptance. Universally, computers construct binary states using transistors such as MOSFETs within electronic logic gates.
Laboratory experimentation remains an important part of developing complex electronic devices today. Electronic design automation software programs include schematic capture tools and printed circuit board design applications. Popular names in the EDA software world include NI Multisim, Cadence ORCAD, and Altium Protel. Engineers use premanufactured building blocks such as power supplies and integrated circuits to design new products. CircuitLogix, Multisim, and PSpice represent modern electronics lab simulation software trends. Heat generated by circuitry must be dissipated through passive conduction or active cooling methods. Heat sinks and fans provide air cooling while water cooling offers other forms of thermal management. Noise defined as unwanted disturbances superposed on useful signals tends to obscure information content.
The semiconductor industry generated annual revenues exceeding 481 billion dollars in 2018 alone. U.S. manufacturers could not compete with Japanese companies like Sony and Hitachi during the 1960s. By the 1980s, American firms became world leaders in semiconductor development and assembly again. The industry shifted overwhelmingly to East Asia over three decades starting from the 1970s. Plentiful cheap labor and increasing technological sophistication became widely available there for manufacturing. The United States global share of semiconductor manufacturing capacity fell from 37 percent in 1990 to 12 percent in 2022. Intel Corporation fell far behind its subcontractor Taiwan Semiconductor Manufacturing Company in technology. Taiwan has become the world's leading source of advanced semiconductors followed by South Korea and China.
Common questions
Who developed the first semiconductor device in 1874?
Karl Ferdinand Braun developed the crystal detector in 1874, marking the first semiconductor device ever created. This invention established the foundation for all subsequent electronic components.
When did John Bardeen and Walter Houser Brattain invent the transistor at Bell Labs?
John Bardeen and Walter Houser Brattain invented the first working point-contact transistor at Bell Labs in 1947. Thomas J. Watson Jr. ordered all future IBM products to use transistors after April 1955 when the IBM 608 calculator launched.
How many MOSFETs have been manufactured between 1960 and 2018 alone?
An estimated 13 sextillion MOSFETs have been manufactured between 1960 and 2018 alone. The MOSFET was invented at Bell Labs between 1955 and 1960 as a truly compact alternative that became the most widely used electronic component in the world.
What is the difference between analog circuits and digital circuits?
Analog circuits utilize a continuous range of voltage or current for signal processing operations while digital circuits operate based on discrete voltage levels labeled as logic zero and logic one. Boolean algebra forms the basis of all digital computers and microprocessor devices.
Which countries dominate semiconductor manufacturing capacity today?
Taiwan has become the world's leading source of advanced semiconductors followed by South Korea and China. The United States global share of semiconductor manufacturing capacity fell from 37 percent in 1990 to 12 percent in 2022.