Micro systems technology (MST) is the design and integration of miniature systems that combine functions such as sensing, actuation, electronic processing, mechanical movement, fluid handling, or optics. The defining feature is not simply that a device is small: it is that multiple relevant functions are engineered to work together as a compact system.
What does micro systems technology mean?
MST is an interdisciplinary way of building miniature functional systems. It brings together fields including microelectronics, micromechanics, microsensors, microactuators, microfluidics, and microoptics. In a microsystem, components such as sensors, actuators, and data processors interact to perform a task; its functional elements may be measured in micrometers. A 1994 IEEE conference contribution cataloged by the University of Twente describes the field as a convergence of precision engineering, microelectronics, sensors and actuators, and molecular engineering, and emphasizes the importance of designing the system integrally.
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That integration distinguishes MST from miniaturization alone. Making one component smaller does not by itself make a system a microsystem. The relevant question is whether its small-scale components and functions are designed to work together to do a job.
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Microelectromechanical systems (MEMS) and MST overlap substantially, but the terms are not universally interchangeable. MEMS usually refers to systems combining mechanical elements with electrical or electronic functions, often fabricated on silicon. A thesis on MEMS terminology notes that the field has also been called “Micro Systems Technology” in Europe and “micromachines” in Japan. The terminology varies by source and engineering community.
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MST can also be used as a broader framing for integrated microsystems that include functions beyond mechanical-electrical ones, such as microfluidics or microoptics. In short, MEMS is a common overlapping category; MST can describe the broader integration of miniature functions.
What can a microsystem combine?
A microsystem brings together only the functions needed for its purpose. Depending on the device, that may include:
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- STM32F429ZIT6 microcontroller featuring 2 Mbytes of Flash memory, 256 Kbytes of RAM in an LQFP144 packag
- 2.4" QVGA TFT LCD,USB OTG with Micro-AB connector,I3G4250D, ST MEMS motion sensor 3-axis digital output gyroscope
- Six LEDs: – LD1 (red/green) for USB communication – LD2 (red) for 3.3 V power-on – Two user LEDs: LD3 (green), LD4 (red) – Two USB OTG LEDs: LD5 (green) VBUS and LD6 (red) OC (over-current
- Two push-buttons (user and reset),64-Mbit SDRAM,Extension header for LQFP144 I/Os for a quick connection to the prototyping board and an easy probing,On-board ST-LINK/V2-B
- Board power supply: through the USB bus or from an external 3 V or 5 V supply voltage
- Sensing: detecting a physical condition, such as acceleration, pressure, or a biological signal.
- Actuation: producing movement or another controlled response.
- Electronic processing: handling or interpreting signals from sensors and controlling system behavior.
- Mechanical structures: moving or supporting small-scale components.
- Fluid handling: directing or controlling tiny volumes of liquid.
- Optical functions: working with light as part of the system.
Technical overviews describe microelectronics, micromechanics, microfluidics, and microoptics as contributing disciplines, with sensors, actuators, and processors interacting in the resulting system. The combination depends on the function being built.
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Common examples of miniature devices in this area include accelerometers, gyroscopes, pressure sensors, biosensors, micropumps, and microvalves. They illustrate different functions rather than defining an exhaustive list. For instance, an accelerometer senses acceleration, while a micropump moves fluid.
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- 3-Axis MEMS Accelerometer Module: This LIS2DH12TR accelerometer module is designed for accurate 3-axis linear acceleration measurement, making it ideal for motion sensing, orientation detection, shake control, pedometer projects, impact detection, gaming input devices, and embedded motion-monitoring applications.
- Ultra-Low Power for Battery-Powered Designs: Featuring ultra-low power consumption as low as 2μA, the LIS2DH12 motion sensor is a great choice for portable electronics, wearable devices, wireless sensors, IoT nodes, and other low-power systems that require continuous motion detection with minimal energy use.
- I2C and SPI Digital Interfaces: The module supports both I²C and SPI digital output interfaces, offering flexible connection options for microcontrollers and development boards. It is suitable for Arduino, STM32, ESP32, Raspberry Pi, and other embedded development platforms that require compact motion sensing.
- Selectable Measuring Range and Fast Data Output: The LIS2DH12 supports selectable full-scale ranges of ±2g, ±4g, ±8g, and ±16g, allowing users to match sensitivity to different applications. With an output data rate from 1Hz to 5.3kHz, it can handle both low-speed orientation changes and faster dynamic motion events.
- Programmable Interrupts and Orientation Detection: Built-in programmable interrupt generators support motion detection, free-fall detection, wake-up events, and 6D/4D orientation detection. With a wide operating temperature range of -40°C to +85°C and a compact sensor design, this module is well suited for robotics, smart devices, data logging, and industrial or DIY motion-sensing projects.
| Example | Primary function | What it illustrates |
|---|---|---|
| Accelerometer | Sensing acceleration | A microsystem can detect a physical quantity. |
| Gyroscope | Sensing rotation | Small-scale sensing can support measurement of motion. |
| Pressure sensor | Sensing pressure | A microsystem can turn a physical condition into a signal. |
| Biosensor | Sensing a biological signal or condition | Microsystems can be used for biological sensing. |
| Micropump | Moving fluid | Integrated systems can handle fluid, not just mechanical motion or electronic signals. |
| Microvalve | Controlling fluid flow | Microscale components can regulate a process. |
How does a microsystem move from idea to product?
A historical European Commission CORDIS project record describes a general development sequence for complete MST products. It is useful as a lifecycle outline, not as a claim that every current project follows identical stages. The sequence is:
- Concept: define the task and the functions the system needs.
- Feasibility study: assess whether the proposed system can be realized.
- Design: plan how the components and functions will work together.
- Prototype: build an initial version for evaluation.
- Test: check the prototype against its intended function.
- Manufacture: move from development toward production.
What MST does not tell you
MST is a field and design approach, not a single device specification or a guarantee of a particular size, performance, or application. The term alone does not say how a system is made, how well it works, or whether it meets a particular standard. The sources cited here do not establish a formal international standard definition, nor do they provide a current market-size or adoption figure.
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- It features highly integrated and can detect four environmental parameters at the same time.
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