Innovative semiconductor technology: the engine of our connected world

Semiconductor technology forms the foundation of modern electronics and advanced technologies. It combines physical principles, highly precise manufacturing processes, and innovative materials to create powerful components. Semiconductor technology drives and optimizes the performance of countless devices, making it a key field for our digital and interconnected future.

What is a semiconductor?

A semiconductor is a material whose electrical conductivity lies between that of a conductor and an insulator. Its conductivity can be deliberately adjusted by external factors such as temperature or electric fields, making semiconductors essential components in electronic devices.

The field of semiconductor technology

Semiconductor technology refers to the science and engineering behind the development, manufacturing, and processing of semiconductor devices. It encompasses everything from selecting suitable materials to highly precise fabrication processes and the integration of finished components into complex systems.

Semiconductor structures and manufacturing processes

Before a semiconductor chip can function, it must go through numerous production steps. These highly coordinated structures determine how the chip conducts electricity and processes signals.

Semiconductor structures

Semiconductors are composed of multiple ultra-thin layers stacked on top of each other, with each layer exhibiting distinct electrical properties. Through targeted doping or etching, tiny components such as transistors or diodes are created.

Compact structures for maximum performance

These components are combined on a single chip—often billions of them within an area no larger than a fingernail. The smaller and more precise the structures—enabled by wafer-level systems such as the WT35X0—the faster and more energy-efficient the chip becomes.

Manufacturing processes

The fabrication of a semiconductor is highly complex and follows a sequence of precisely coordinated steps:

Step 1: Planarization

The wafer— the thin semiconductor disc that forms the basis for all subsequent steps—must be perfectly smoothed so that layers can be applied evenly and the resulting components function with high precision.

Step 2: Cleaning

Dust, particles, and chemical residues are thoroughly removed. This prevents defects or short circuits and is essential for the overall quality of the chip.

Step 3: Measurement and inspection

Every structure is checked after each process step to ensure that all specifications are met exactly. This allows errors to be identified and corrected at an early stage.

Step 4: Lithography

Light-sensitive layers are used to transfer microscopic patterns for the later components onto the wafer— much like a stencil.

Step 5: Etching

Excess material is selectively removed—similar to precision techniques such as laser drilling—to form the intended structures.

Step 6: Deposition

New material layers are applied to complete the components and ensure the required electrical functionality.

Step 7: Doping

By deliberately introducing foreign atoms, the electrical properties of the material are precisely adjusted, creating p-type or n-type regions that guide current in a controlled way.

Connection to laser applications

Lasers are increasingly used to precisely process structures, cut fine paths, or create electrical contacts. Laser processing machines achieve extremely high accuracy without damaging sensitive materials, significantly accelerating production.

Physical fundamentals of semiconductors

Semiconductors function only because of specific physical properties that define their structure and behavior. To understand why they can conduct electricity — but only under certain conditions — it is worth looking at the fundamental mechanisms that make their operation possible.

Structure and material selection

Semiconductors are typically made of silicon, though specialized materials such as gallium arsenide are also used. What matters most is that the atoms are arranged in an ordered crystal lattice. This lattice structure allows electrons to move in a controlled way, ensuring that current flows only where it is intended.

Conductivity and control

Semiconductors do not conduct electricity like metals do, but only under specific conditions. Their ability to conduct current can be influenced by temperature, light, or electric fields. It is precisely this characteristic that makes semiconductors so versatile: they can be deliberately “switched on or off.”

Doping – the targeted introduction of foreign atoms

To improve the functionality of semiconductors, small amounts of other atoms are added to the material — a process known as doping.

• In n-type doping, additional electrons are introduced, making it easier for electric current to flow.
• In p-type doping, “holes” are created — positions where electrons are missing — which also enable current flow.

Through this precise control, p–n junctions are formed. They act like tiny one-way streets for electrons and form the basis of key components such as diodes, transistors, and solar cells.

p–n junctions and semiconductor devices

A p–n junction is formed when an n-type and a p-type semiconductor meet. Current can then flow in only one direction. When combined with additional layers and interconnections, these junctions form the basis for complex components such as microchips, LEDs, and sensors.

Influence of temperature and light

Semiconductors respond sensitively to external factors. Heat or light can change the number of free electrons and thus alter their conductivity. This behavior is deliberately utilized — for example, in photodetectors, solar cells, and temperature sensors.

Perspectives within semiconductor technology

To better understand semiconductors and their manufacturing, the technology is viewed from several perspectives. Each perspective explains how components are created, how they function, and how they are implemented in industrial applications.

The process perspective

The process perspective examines each individual step involved in manufacturing a semiconductor device. This includes tasks such as doping to control conductivity, structuring the wafer, or applying specialized coatings. The goal is to control every process so precisely that the desired electrical, optical, or mechanical properties are achieved.

The integration perspective

The integration perspective focuses on the overall structure of the final product — for example a transistor, microchip, or sensor design. The key point here is how individual process steps are aligned and coordinated to ensure that the component operates reliably.

The materials science perspective

This perspective centers on the properties of the materials used. It examines how silicon, gallium arsenide, or modern compound semiconductors behave, forming the basis for innovations in semiconductor technology.

The production engineering perspective

The production engineering perspective focuses on efficiency, precision, and cost-effectiveness. It considers how processes can be automated, scaled, and designed for sustainability — a crucial factor for industrial deployment.

Application fields of semiconductor technology

Semiconductors are present everywhere: they control computers and smartphones, enable high-speed data transmission, power precise laser applications, and play a central role in power electronics. In industry and mobility, they are found in sensors, control units, and electric vehicles. Medical technology, robotics, household appliances, and photovoltaic solar cells also rely on semiconductors to convert energy or process signals. Their versatility makes them key components of modern technology.

Future perspectives of semiconductor technology

Semiconductor technology is continuously evolving. Ever smaller and more powerful components enable higher efficiency and entirely new functionalities:

Miniaturization and performance

Components are becoming smaller, faster, and more energy-efficient. 3D chips enable new architectures within extremely limited space.

New materials

Silicon carbide and gallium nitride improve efficiency, temperature resistance, and overall performance.

Automation and AI

Automated manufacturing and AI-assisted design increase precision and optimize resource usage.