Multi-Tier PLC Software Architecture and Process Automation Control
KOSEN SEMI provides a multi-tier control architecture engineered specifically for high-precision semiconductor wet process equipment. Designed for mission-critical wafer processing, our solution integrates field-level execution, deterministic process control, and standardized fab MES communications into a unified, high-availability wafer-cleaning-systems platform.
Architecture Layers
Key Architecture Metrics
Equipment Layer Execution
The equipment layer forms the physical execution baseline of our wet bench control system. It integrates high-precision sensors, chemical distribution actuators, and localized explosion-proof PLC hardware engineered specifically for hazardous semiconductor wet processing environments.
Utilizing intrinsically safe field interfaces, anti-corrosive housing, and high-speed bus connectivity, this layer delivers robust sensor signal acquisition and rapid actuator response under aggressive acid, solvent, or DI water processing conditions.
Core Capabilities
- •Explosion-Proof PLC Hardware: Certified enclosures, intrinsic safety barriers, and chemical-isolated I/O modules designed for volatile processing zones.
- •High-Frequency Signal Sampling: Sub-millisecond polling of liquid levels, chemical flow rates, bath temperatures, and inline chemical concentration sensors.
- •Precision Actuator Control: Microsecond pulse-width modulation for metering pumps, fast-acting pneumatic valves, and chemical auto-dosing systems.
Hardware Redundancy Infrastructure
Unplanned downtime in semiconductor wafer fabrication can ruin entire process lots and disrupt tight production schedules. KOSEN SEMI eliminates single points of failure by implementing complete dual-machine hot standby hardware redundancy across all critical processing nodes.
If a primary process automation controller experiences an anomaly, the secondary redundant controller takes over full execution in under 10 milliseconds without interrupting active chemical immersion, bath circulation, or wafer transfer.
- • Hot Standby Controller Sync: Continuous microsecond memory mirroring ensures identical state matching for fail-safe switchovers.
- • Redundant Power & Communication: Dual power inputs and isolated EtherCAT lines maintain uninterrupted sensor and actuator links.
- • Zero Wafer Scraping: Immediate seamless failover prevents chemical stagnation, surface staining, and costly lot loss.
Modular System Scalability
Semiconductor wet bench control systems must easily adapt as production volumes expand and process recipes evolve. Our modular software architecture and flexible hardware infrastructure allow seamless feature additions without expensive tool redesigns.
Fabs can easily integrate additional chemical supply loops, quick-dump rinse (QDR) tank modules, or megasonic cleaning channels on demand using plug-and-play fieldbus extensions and configurable control modules.
- • Modular I/O Expansion: Distributed EtherCAT nodes simplify physical hardware additions without cabinet re-wiring.
- • Dynamic Software Configuration: Automated hardware detection integrates new process modules into existing recipe flows.
- • Future-Proof Upgrades: Standardized software frameworks accommodate changing chemical formulations and next-gen wafer sizes.
Core Wet Process Control Capabilities & Closed-Loop Precision
KOSEN SEMI delivers high-precision process automation controllers specifically engineered for semiconductor wet bench systems. Our advanced closed-loop control systems dynamically stabilize chemical dosing, multi-zone thermal dynamics, fluid flow rates, and immersion timing to maximize wafer fabrication yield and process repeatability.
Precision Chemical Dosing Control & PID Replenishment
Maintaining exact chemical bath concentrations during continuous wet cleaning, stripping, and etching is essential for wafer yield consistency across specialized wafer cleaning systems. KOSEN SEMI combines automated chemical liquid ratio management with continuous real-time concentration monitoring.
- • Inline Concentration Monitoring: Connects directly with optical, refractometer, and conductivity sensors for continuous bath measurement and concentration analysis.
- • PID Automated Replenishment: Calculates exact chemical injection spikes in real time to counteract bath degradation and eliminate concentration drift.
- • Chemical Waste Optimization: Extends bath operational lifetime while significantly reducing raw chemical consumption and hazardous waste disposal costs.
Multi-Zone Precision Temperature Control
Thermal uniformity across process baths directly governs chemical reaction rates and etching depth across the wafer surface. Our multi-zone precision temperature control technology eliminates thermal overshoot, cold spots, and bath temperature fluctuations.
- • Multi-Zone Heating Control: Synchronizes quartz inline heaters and immersion tank heating elements using dual-loop PID algorithms.
- • Thermal Stability: Holds process fluid temperatures within ±0.1°C stability, even under heavy, high-throughput wafer loading cycles.
- • Fast Thermal Ramp & Response: Rapidly reaches target operating temperatures with minimal stabilization lag when switching active process recipe stages.
Vibration-Free Multi-Axis Servo Wafer Handling
Transferring delicate wafer cassettes across chemical process stations requires smooth, vibration-free motion trajectory control to prevent micro-bubble entrapment, chemical splashing, and substrate damage during immersion.
- • S-Curve Acceleration Profiles: Soft-start and soft-stop velocity algorithms eliminate fluid turbulence and surface agitation during cassette immersion.
- • Multi-Axis Servo Positioning: Delivers micrometer-level transfer accuracy across etching, cleaning, and megasonic rinse stations.
- • Optimized Drip & Drain Delays: Dynamically adjusts lifter dwell times to minimize chemical carryover contamination between process baths.
Flexible Recipe Management Software & Audit Trails
Modern semiconductor fab automation demands intuitive recipe management software paired with robust process security. KOSEN SEMI provides graphical recipe editing tools backed by multi-tier user access control and complete change tracking.
- • Visual Step Sequence Editor: Build, modify, and optimize multi-stage wet processing recipes through an intuitive graphical flow interface.
- • Multi-Level Permission Security: Protects critical process parameters with strict role-based operator, process engineer, and system admin permissions.
- • Full Audit Logging & Traceability: Automatically archives every recipe modification, parameter override, and step execution timestamp for quality compliance.
Real-Time Closed-Loop Process Control Architecture
Our semiconductor equipment automation architecture connects high-speed sensor inputs directly to industrial PLC execution units. By combining sub-millisecond sampling rates with multi-variable closed-loop algorithms, KOSEN SEMI wet bench control systems preserve critical process stability across continuous high-volume production cycles.
Real-time concentration monitoring prevents bath degradation and extends chemical replacement cycles.
Dual-loop PID temperature control maintains thermal drift within ±0.1°C across all process tanks.
Multi-axis servo positioning eliminates splashing, reducing chemical carryover and cross-contamination.
Automated parameter logging archives historical run data for seamless MES and SECS/GEM integration.
Control Performance Benchmarks & Yield Comparison
Comparing standard wet bench automation with KOSEN SEMI closed-loop process control architecture.
| Control Parameter | Standard Bench Control | KOSEN SEMI System | Yield & Process Advantage |
|---|---|---|---|
| Chemical Concentration Control | ±1.5% Volumetric manual dosing | ±0.1% Online PID closed-loop | Up to 18% chemical savings & uniform etch rates |
| Process Temperature Uniformity | ±1.0°C Standard single-loop heating | ±0.1°C Multi-zone thermal precision | Consistent etch depth across 200mm/300mm wafers |
| Wafer Transfer Motion Profile | Uncontrolled pneumatic step motion | Multi-axis S-curve servo positioning | Zero splash cross-contamination & zero wafer breakage |
| Recipe Management & Traceability | Manual operator logs & basic timers | Automated RMS with full audit trails | 100% SECS/GEM & fab MES standard compliance |
Standards & Protocol Compliance
Eliminate integration risks between wet processing equipment and fab Host/MES through pre-validated communications and rigorous safety design, backed by our advanced Engineering Capability.
SEMI Standards Compliance Matrix
Full adherence to international semiconductor industry standards guarantees seamless host interoperability and workplace safety.
| Standard | Protocol / Scope | Fab Application | Compliance Status |
|---|---|---|---|
| SEMI E84 | SEMI E84 Interface | Automated Material Handling System (AMHS) optical handoff signals and carrier transfer. | Fully Compliant |
| SEMI E30 | SECS/GEM Compliance Protocol | Generic Equipment Model establishing standardized equipment states, events, and host control. | Fully Compliant |
| SEMI E37 | HSMS Communication | High-Speed SECS Message Services delivering high-bandwidth message transport over TCP/IP. | Fully Compliant |
| SEMI S2 / S8 | SEMI S2 Safety Standards | Comprehensive environmental, health, chemical, electrical, and ergonomic safety guidelines. | Certified |
Host & MES Seamless Integration
Connect high-performance wafer cleaning systems and wet bench tools directly to fab host systems with rapid network provisioning and flexible remote scheduling capabilities.
- Pre-configured SECS/GEM communication drivers streamline MES integration.
- Automated job dispatching and recipe downloading optimize tool utilization.
- Real-time event logging and trace data collection accelerate fault diagnostics.
Hardware Safety Interlock Design
Protect cleanroom operators and high-value wafers using fail-safe safety interlocks engineered to SEMI S2 safety standards.
- Hardwired fail-safe loops trigger non-programmable protective stops instantly.
- Dedicated Emergency Off (EMO) buttons isolate hazardous power and chemicals.
- Physical door and panel interlocks cut hazardous motion during maintenance.
Pre-Validated Reliability for Semiconductor Facilities
KOSEN SEMI architectures pass rigorous fab qualification audits, accelerating tool bring-up and supporting stable high-volume production.
Real-Time Process Monitoring, Fault Detection and Diagnostics
KOSEN SEMI embeds an advanced process telemetry engine directly into semiconductor wet bench control systems. By aggregating high-frequency sensor feedback and executing algorithm-driven Fault Detection and Diagnostics (FDD), our process automation controller safeguards wafer yield, eliminates unscheduled tool downtime, and guarantees end-to-end recipe integrity across high-volume manufacturing environments for our global customers.
Millisecond High-Frequency Real-Time Data Acquisition
200 nm standard and optimized 100 nm etching and precision wet cleaning demand continuous, uncompromised process visibility. KOSEN SEMI real-time process monitoring solutions utilize ultra-fast deterministic polling to aggregate critical physical parameters across every process tank and chemical delivery loop, complementing our specialized chemical cleaning equipment.
- Sub-Millisecond Sampling: Continuously records chemical temperature, flow rates, line pressure, and pH concentration at high refresh frequencies to instantly catch micro-transients.
- Multi-Sensor Fusion: Synchronizes digital outputs from inline infrared temp sensors, magnetic flow meters, and chemical concentration monitors into a single coherent data stream.
- Edge Telemetry Filtering: Filters raw sensor noise at the controller level to prevent false positives while retaining high-fidelity trend data for advanced analytical models.
Algorithm-Based Anomaly Warning and Wafer Fabrication Predictive Maintenance
Unplanned equipment downtime in semiconductor fabrication facilities incurs catastrophic financial losses. Our embedded fault detection and diagnostics (FDD) suite replaces reactive troubleshooting with predictive algorithm-driven intelligence, flagging subsurface hardware degradation long before process drift impacts product yield in our Custom Wet Process Stations.
- Pump & Valve Wear Diagnostics: Identifies subtle pressure drop curves and valve actuation delays, warning maintenance teams of impending mechanical seal or diaphragm wear.
- Dynamic Thermal Drift Analysis: Tracks inline heater power consumption relative to bath temperature ramps to detect quartz element scaling or heat exchanger degradation early.
- Automated Interlock Warnings: Triggers multi-tiered warnings—from non-critical maintenance alerts to immediate, safe-state interlock stops during severe fluidic anomalies.
Comprehensive Traceability and Audit Trail Logging
Ensuring yield repeatability across thousands of wafer lots requires absolute historical transparency. KOSEN SEMI's data logging architecture captures full contextual history, adhering to strict high-volume manufacturing compliance standards.
- 21 CFR Part 11 Ready Logs: Encrypted, tamper-proof event logs record user interactions, parameter changes, automated recipe executions, and alarm histories.
- Wafer-Level Historical Tracking: Correlates specific lot IDs and wafer carrier positions with exact timestamped bath chemistry and temperature curves.
- Seamless Host / MES Export: Streams aggregated diagnostic logs directly to fab host systems via native SECS/GEM and HSMS interfaces for site-wide analytics.
Process Chamber #2
SC-1 Chemical Bath Recirculation Loop
Bath Temperature
65.00 °C
Target: 65.00 °C ± 0.01
Line Pressure
0.31 MPa
Nominal: 0.30 - 0.33 MPa
Recirculation Flow
14.5 L/min
Nominal: 14.0 - 15.0 L/min
Inline Concentration
2.10 pH
PID Auto-Replenish Active
FDD Diagnostic Alert: Pump Seal Degradation
Pressure spike (+22%) paired with flow loss detected on Main Circulation Pump P-102. Predictive wear model estimates diaphragm fatigue within 48 operational hours.
< 1ms
Sampling Latency
Deterministic real-time sensor polling frequency.
99.8%
Early Fault Accuracy
Algorithm-driven drift detection before yield impact.
50,000+
MTBF Hours
Industrial controller hardware mean time between failures.
100%
Audit Compliance
21 CFR Part 11 concepts and full lot traceability.
KOSEN SEMI Semiconductor Control Hardware Specifications
Technical parameters and hardware architecture optimized for wet bench automation, high process accuracy, and continuous 24/7 fabrication line operation, seamlessly compatible with our wafer-cleaning-systems.
Industrial-grade real-time PLC / IPC architecture built for high-throughput wet processing.
Sub-millisecond industrial PLC response time for high-precision closed-loop control.
Native EtherCAT, Modbus TCP, and SECS/GEM via TCP/IP for seamless MES host integration.
Explosion-proof and corrosion-resistant panel constructed for aggressive chemical environments.
Core Hardware & System Parameters
Integrated Semiconductor Control Hardware
Purpose-built for wet bench and cleaning equipment requiring deterministic timing, high system availability, and consistent process repeatability.
Tailored Hardware & I/O Configurations
Need customized signal conditioning, expanded I/O mapping, or specialized SECS/GEM compliance setups? Backed by our advanced Engineering Capability, our application team assists with full system design.
Certified Industrial Uptime
Rigorously validated for continuous 24/7 operation, EMC compliance, and harsh chemical cleanroom conditions.
Fab Automation Ready
Integrated SECS/GEM protocol stack simplifies host automation and fab-wide station management.
Engineering & CAD Assets
Instant access to pinout diagrams, 3D STEP models, and wiring schematics for seamless machine design.
Upgrade Your Wet Equipment Automation Solution to Elevate Yield
Optimize your fab operations with robust semiconductor process control architectures, precision chemical dosing, and seamless MES integration across high-performance wafer-cleaning-systems.
- Tailored SECS/GEM and PLC software integration for wet benches and Single Wafer Cleaning Systems
- Engineering Capability driven custom technical consultations for high-precision process control
- Seamless retrofits designed to minimize unscheduled fab downtime
Engineering Response SLA: Reviewed and followed up by senior semiconductor control engineers within 24 hours.
Direct Engineering Support
KOSEN SEMI Control Advisory