integrated circuit

integrated circuit
Name	Integrated circuit
Caption	A modern microprocessor, a complex type of integrated circuit.
Invented	1958–1959
Inventors	Jack Kilby, Robert Noyce
First production	1960
Pin count	8 to over 2000
Package	Dual in-line package, Ball grid array, Quad Flat Package
Related	Transistor, Resistor, Capacitor, Semiconductor device fabrication

integrated circuit. An integrated circuit is a set of electronic circuits on a small flat piece of semiconductor material, typically silicon. The integration of large numbers of tiny transistors into a small chip results in circuits that are orders of magnitude smaller, faster, and less expensive than those constructed of discrete electronic components. The mass production capability, reliability, and building-block approach to circuit design ensured the rapid adoption of standardized integrated circuits in place of designs using discrete transistors, revolutionizing the world of electronics.

History

The concept of integrating electronic components into a single semiconductor block was theorized by Geoffrey Dummer of the Royal Radar Establishment in 1952. The first working prototypes were independently invented in 1958 by Jack Kilby of Texas Instruments, who created a device from germanium, and in 1959 by Robert Noyce of Fairchild Semiconductor, who pioneered the use of silicon and the critical planar process. Kilby was awarded the Nobel Prize in Physics in 2000 for his part in the invention. Early development was heavily supported by the Apollo program and the Minuteman missile project, which demanded lightweight, reliable computers. The subsequent commercialization by companies like Intel, founded by Noyce and Gordon Moore, and the formulation of Moore's law, drove exponential increases in complexity, exemplified by products like the Intel 4004.

Design

The design process, often called electronic design automation, involves creating a schematic and translating it into a physical layout. This is performed using sophisticated software tools from companies like Cadence Design Systems and Synopsys. Designs are built from libraries of pre-designed cells implementing logic functions like NAND or NOR gates. For highly complex designs like microprocessors or graphics processing units, teams of engineers use hardware description languages such as VHDL or Verilog to model and simulate the circuit's behavior before tape-out. The final layout data, describing the intricate patterns for each semiconductor device fabrication layer, is used to create the photomasks for manufacturing.

Manufacturing

Manufacturing, or fabrication, occurs in specialized facilities called semiconductor fabrication plants, or "fabs," operated by companies like TSMC, Samsung Electronics, and GlobalFoundries. The process begins with the production of extremely pure silicon wafers. Using techniques like photolithography, ion implantation, and chemical vapor deposition, layers of materials are patterned and modified to form transistors and interconnects. Advanced nodes, such as the 5 nanometer process, use extreme ultraviolet lithography machines from ASML Holding. After fabrication, the wafers are diced into individual dies, which are tested, packaged in protective casings like a dual in-line package or ball grid array, and subjected to final quality assurance before shipment.

Types

Integrated circuits are broadly categorized by their functionality. Digital circuits, which process binary data, include microprocessors, microcontrollers, memory chips like dynamic random-access memory, and field-programmable gate arrays. Analog circuits process continuous signals and are found in operational amplifiers, voltage regulators, and radio frequency systems. Mixed-signal integrated circuits combine both digital and analog functions on a single chip, which is essential for components like analog-to-digital converters used in modems and sensor interfaces. Other specialized types include application-specific integrated circuits designed for a particular use and power management integrated circuits.

Applications

Integrated circuits are ubiquitous in modern technology. They form the core of all computer systems, from supercomputers to smartphones, enabling devices like the Apple M2 and Qualcomm Snapdragon. In consumer electronics, they power televisions, digital cameras, and video game consoles such as the PlayStation 5. The automotive industry relies on them for engine control units, infotainment, and advanced driver-assistance systems. Critical applications also extend to medical equipment like MRI scanners and pacemakers, industrial robots, and infrastructure for the Internet and global positioning system.

Impact and future trends

The proliferation has driven the Digital Revolution, transforming economies, enabling globalization, and creating the information age. Societally, it facilitated the rise of companies like Microsoft, Google, and Amazon, and reshaped communication through the World Wide Web. Current research focuses on extending Moore's law through new materials like gallium nitride, advanced architectures like three-dimensional integrated circuits, and novel computing paradigms such as quantum computing. Challenges include the physical limits of semiconductor device fabrication, economic costs of new fabs, and global supply chain security, highlighted by recent acts like the CHIPS and Science Act.

Category:Integrated circuits Category:American inventions Category:Semiconductor devices