Servo drive systems in the electronics and semiconductor industries
The electronics and semiconductor industries are the cornerstone of the global technology industry. Their manufacturing processes demand precision, speed, and stability at the micron or even nanometer level. Servo drive systems, the power and brains of these devices, directly determine their processing accuracy, production efficiency, and product yield. Electronics and semiconductor manufacturing involves multiple stages, including wafer processing, chip packaging, and testing. While the equipment characteristics of each stage vary significantly, the core requirements for servo drive systems remain highly consistent.
Ultra-high-precision control: For example, processes such as wafer dicing and chip bonding require micron-level (μm) or even submicron-level (0.1μm) positioning accuracy. Servo drive systems require high-resolution encoders (such as 23-bit or higher absolute encoders) and real-time current and velocity loop adjustments to eliminate positioning errors and motion lag, ensuring accurate processing positions.
High-speed dynamic response: In high-frequency operations such as chip testing and terminal processing, moving parts (such as test probes and machining tools) must start and stop quickly and switch directions. The servo drive system must have a dynamic response speed of milliseconds to avoid production efficiency losses or product damage caused by response delays.
High stability and reliability: Electronic and semiconductor equipment typically operate 24/7, and manufacturing environments (such as cleanrooms) require extremely low equipment failure rates. Servo drive systems require optimized heat dissipation design, anti-interference circuits (such as EMC design), and redundant protection mechanisms to ensure long-term trouble-free operation and minimize equipment downtime.
Multi-axis coordinated control: For example, dispensing equipment and chip placement equipment require simultaneous control of 3-6 motion axes (X/Y/Z axes and rotational axes) to achieve precise, synchronized motion along complex trajectories (such as arcs and curves). The servo drive system must support multi-axis pulse synchronization or bus-based control (such as EtherCAT and Profinet) to ensure coordinated motion across all axes and avoid dispensing offsets and placement misalignments caused by inter-axis synchronization errors.
Application of servo drive systems in the electronics and semiconductor industries
| Application Scenario | Core device example | The role of servo drive system | Key technical requirements |
|---|---|---|---|
| Wafer processing | Wafer cutting machine, wafer grinding machine | 1. Drives the cutting blade/grinding head for high-precision linear motion, controlling cutting depth and grinding thickness; 2. Drives the wafer table for uniform rotation, ensuring processing uniformity. |
Positioning accuracy ≤±1μm, speed stability ≤0.1% |
| Chip packaging | Chip bonder, chip placement machine | 1. Drives the bonding head (gold/copper wire) to achieve high-frequency, high-precision inching, completing the connection between the chip and the substrate; 2. Drives the placement nozzle to achieve precise chip pickup and placement. |
Dynamic response ≤5ms, multi-axis synchronization error ≤±0.5μm |
| Dispensing and coating process | High-precision dispensing machine, packaging coating machine | 1. Drives the dispensing needle along a preset trajectory (e.g., chip edge, pin gap), controlling the uniformity of the adhesive volume. 2. Drives the worktable to coordinate movement with the dispensing needle. |
Track following error ≤ ±0.3μm, wide speed adjustment range |
| Testing and inspection | Chip tester, terminal testing equipment | 1. Drives the test probe to quickly contact the chip pins, enabling high-frequency continuity testing; 2. Drives the inspection lens/sensor to accurately scan the chip's surface. |
Fast start and stop response, positioning repeatability ≤±0.2μm |
| Auxiliary processing links | Terminal processing machine, PCB board cutting machine | 1. Drives the cutting tool to achieve high-precision cutting and bending of terminals; 2. Drives the PCB worktable to follow the cutting path of special shapes. |
Strong load adaptability and stable cutting speed |
Servo system solutions
Scenario-Specific Hardware Adaptation: For high-frequency, high-precision applications such as chip bonding and dispensing, we offer a high-response servo drive and low-inertia servo motor combination. The motor's moment of inertia is ≤0.01kg·m², and the driver's current loop bandwidth is ≥1kHz, meeting the high-frequency motion requirements of the bond head, often tens of times per second. For lithium battery testing equipment, we provide a high-torque servo system to ensure stable grip and pressure control of the test fixture.
Integrated Motion Control: The solution integrates a servo drive + motion controller + encoder, supporting EtherCAT bus control for real-time, synchronized control of multiple axes (up to 32 axes). It also provides dedicated control algorithms (such as electronic CAM and fly-by-fly tracking) for direct adaptation to scenarios such as dispensing trajectory optimization and chip placement positioning, reducing secondary development costs for equipment manufacturers.
Optimized Industry Adaptability: Targeted at the dust-free, low-noise environments of the electronics and semiconductor industries, the device features a fully enclosed enclosure (IP65 protection rating) and is EMC Class B certified to prevent electromagnetic interference in sensitive processes like chip testing. It also supports mainstream industry standards. Seamless connection between PLC (such as Siemens, Mitsubishi) and equipment control systems reduces the difficulty of equipment integration.