SEMI GEM300 Explained – SEMI Standards for Automated Semiconductor Fabs
GEM300 standardizes material control and equipment communication in automated semiconductor fabs, enabling seamless processes between equipment, material handling systems, and the fab host.
What Is GEM300?
GEM300 is a group of SEMI standards for fully automated material handling and equipment communication in semiconductor fabs. The standards define communication between production equipment, automated material handling systems, and the higher-level fab host (e.g., an IT system or MES) in highly automated manufacturing environments.
In these fabs, materials are no longer moved manually but transported by automated systems such as Overhead Hoist Transport (OHT) systems, Automated Material Handling Systems (AMHS), or Automated Guided Vehicles (AGVs). The goal is a manufacturing environment in which wafer carriers are automatically transported, identified, and processed and can be continuously tracked throughout the entire production process.
GEM300 is based on the established SECS/GEM communication standard and extends it with additional SEMI standards for automated material flow and process control. These include functions for carrier management, substrate tracking, as well as Control Job and Process Job management, which together form the basis for the automation of modern 300 mm semiconductor fabs.
Which Standards Are Part of GEM300?
These standards ensure that material transfer, process steps, and the communication of status messages are automated and standardized, regardless of the equipment manufacturer:
- SEMI E39 – Object Services
Provides common object models for data exchange. - SEMI E84 – Carrier Handoff
Describes the automated handoff of carriers between the transport system and process equipment. - SEMI E87 – Carrier Management
Defines material transfer scenarios for loading and unloading carriers containing substrates. - SEMI E90 – Substrate Management
Enables material tracking through the equipment, ensuring that its position and status are known and can be retrieved at any time. - SEMI E94 – Control Job Management
Assigns substrates to the appropriate Process Jobs and controls their execution. - SEMI E40 – Process Job Management
Describes the workflows and parameters of individual processing steps. - SEMI E116 – Equipment Performance Tracking
Collects and monitors equipment performance data.
What Are the Key Functions of GEM300?
Carrier Handoff and Carrier Management
The SEMI E84 (Carrier Handoff) standard describes the automated handoff of a carrier from the fab’s material handling system, such as AMHS, OHT, AGV, or RGV, to the load port of production equipment.
SEMI E87 (Carrier Management) defines material transfer scenarios for loading and unloading carriers containing substrates. Once a carrier arrives at the equipment, its carrier ID is read and validated to ensure that the expected carrier has arrived. The slot map is then read and verified. After successful validation, the material in the carrier can be processed or unloaded.
Substrate Management
The SEMI E90 (Substrate Management) standard enables continuous tracking of individual substrates throughout their entire path through the equipment. The position and status of each wafer are known at all times and can be retrieved by the higher-level host system.
Job Management
For equipment with recurring or complex process sequences, production jobs are used. GEM300 distinguishes between Control Jobs (SEMI E94) and Process Jobs (SEMI E40).
Once the material has arrived at the equipment and has been accepted, a Control Job assigns the substrates to a Process Job. The Process Job contains the associated recipes and process parameters. Process Jobs are executed in a defined sequence, while multiple Process Jobs can run in parallel on the same equipment. During execution, jobs can be paused, modified, resumed, or aborted, depending on the applicable permissions.
Why Is GEM300 Important for Semiconductor Manufacturing?
GEM300 is a key standard for the automation of modern semiconductor fabs. While SECS/GEM enables basic communication between production equipment and host systems, GEM300 extends this communication with functions for automated material flow, substrate tracking, and production control.
This enables wafers, carriers, and process jobs to be managed automatically and continuously tracked throughout the entire manufacturing process.
For equipment manufacturers (OEMs) and semiconductor fab operators, this provides several key benefits:
Material is transported between equipment using automated transport systems such as AMHS, OHT, or AGV, without any manual intervention.
All substrates and carriers can be uniquely identified and tracked in real time throughout the entire manufacturing process.
Process Jobs and Control Jobs are managed automatically and assigned to the appropriate equipment.
Standardized SEMI interfaces simplify the integration of new equipment into existing production lines and reduce engineering effort.
Standardized processes reduce potential sources of error and minimize contamination risks in semiconductor manufacturing.
Standardized communication interfaces reduce integration time and project lead times.
How Is GEM300 Implemented in Equipment in Semiconductor Fabs?
With FabLink®, Kontron AIS provides a powerful software solution for implementing SECS/GEM and GEM300 interfaces in semiconductor production equipment. The software supports all relevant SEMI specifications and enables fast, reliable, and standards-compliant integration of equipment into existing manufacturing environments.
With FabLink®, both equipment manufacturers and fab operators benefit from short project lead times and predictable integration effort. Commissioning can be completed quickly with minimal downtime, helping to reduce production interruptions. Thanks to its modular architecture, the solution can be flexibly extended and adapted to future projects or new requirements.
FabLink® is used in leading semiconductor fabs worldwide. In addition to GEM300, the software supports other SEMI standards such as SECS/GEM and EDA (Interface A), providing a consistent solution for different levels of equipment integration.
Would you like to find out more about how you can implement the SEMI standards for your equipment? Send us a message directly and we will get in touch with you as soon as possible.
FAQs: SEMI Standards – GEM300
GEM300 is an extension of the established SECS/GEM standard and was specifically developed to meet the requirements of 300 mm semiconductor manufacturing. While SECS/GEM defines basic communication and control functions between equipment and host systems, GEM300 extends these capabilities with additional SEMI standards for highly automated manufacturing environments.
GEM300 enables more efficient production control, greater process reliability, and improved quality assurance in modern semiconductor fabs.
The focus is particularly on material flow, process control, and the integration of complex manufacturing lines. GEM300 includes standards for:
- Object Services (SEMI E39) for standardized object management
- Carrier Management (SEMI E87) and Carrier Handoff (SEMI E84) for automated wafer transport
- Substrate Tracking (SEMI E90) for continuous wafer tracking
- Control Job Management (SEMI E94) and Process Job Management (SEMI E40) for structured job and process control
In addition, Equipment Performance Tracking (SEMI E116) defines a standardized framework for the objective evaluation of equipment productivity.
The goal of GEM300 is to simplify the integration of equipment from different manufacturers into complex 300 mm fabs and ensure a consistent, standardized level of automation. This enables more efficient production control, greater process reliability, and improved quality assurance in modern semiconductor fabs.
GEM300 is implemented based on the established SECS/GEM standard and extended with additional SEMI specifications specifically designed for 300 mm semiconductor manufacturing. These standards cover all key aspects of highly automated fabs, from material flow to process control.
These include:
- Object Services (E39) for standardized object management
- Carrier Handoff (E84) and Carrier Management (E87) for automated material transport
- Substrate Tracking (E90) for continuous wafer tracking
- Control Job Management (E94) and Process Job Management (E40) for structured job and process control
- Equipment Performance Monitoring (E116) for monitoring equipment status and performance metrics
On the equipment side, we integrate GEM300-compliant software that reliably manages material movements, identification, and process states in accordance with SEMI specifications. The host uses these standardized functions to automate transport processes, scheduling, and process control throughout the manufacturing environment.
Correct implementation is verified through testing with reference scenarios and simulators. This ensures that all GEM300 use cases are fully implemented in compliance with the relevant standards, providing the basis for seamless automation of complete 300 mm production lines.
In practice, many companies use a proven GEM300 stack in the form of a software library or toolkit, such as FabLink® from Kontron AIS. This reduces development effort, minimizes risks, and significantly accelerates time to production compared with developing a solution from scratch.
The technical integration of a SEMI GEM300 interface into an equipment control system follows a step-by-step process based on clearly defined standards. The goal is stable, secure, and fully standards-compliant communication between the equipment and the host system (MES).
1. Communication Setup
First, the TCP/IP-based connection between the host and the equipment is established. SECS-I and SECS-II are typically used for communication. Network, firewall, and security settings must be configured in accordance with GEM requirements to ensure reliable data exchange.
2. Implementation of GEM and GEM300 Functionality
All relevant status variables, events, alarms, and reports are defined in the equipment control software. In addition, GEM300-specific functions such as Carrier Management, Control Job and Process Job Management, and Substrate Tracking are integrated.
3. SECS-II Message Handling
The equipment control system must correctly send and receive standardized SECS-II messages, such as S2F13 (Status Request), S6F11 (Event Report), and S1F1/S1F3 for alarm handling.
4. Testing and Validation
The implementation is validated using simulators and reference scenarios. Communication sequences, event triggers, alarm messages, and reporting functions are thoroughly tested to ensure that all GEM300 use cases are reliably covered.
5. Documentation and Configuration
Finally, all messages, variables, events, and states are documented in a GEM manual. This documentation provides the basis for maintenance, extensions, acceptance testing, and audits during operation.
GEM (SECS/GEM) provides the basic communication interface between equipment and the host system. The standard defines how equipment communicates with the host, for example for status queries, events, alarms, and basic control commands.
GEM300 builds on this foundation and extends GEM with additional SEMI standards specifically required for fully automated 300 mm semiconductor manufacturing. These extensions cover areas such as automated material flow, job and process management, and substrate tracking across multiple pieces of equipment.
In short: GEM provides standardized communication. GEM300 enables end-to-end automation of a 300 mm fab.
SEMI GEM300 comprises several closely coordinated SEMI standards that build on SECS/GEM and together provide the foundation for fully automated 300 mm semiconductor manufacturing.
They define material flow, process and job control, as well as standardized communication between equipment and the host system.
The key GEM300 standards include:
- E39 – Object Services
- E40 – Process Job Management
- E84 – Carrier Handoff
- E87 – Carrier Management
- E90 – Substrate Tracking
- E94 – Control Job Management
- E116 – Equipment Performance Tracking
Together, these standards form the GEM300 framework, providing reliable and vendor-independent standardization of material handling, process control, and data collection in modern 300 mm fabs.
SEMI GEM300 provides the foundation for end-to-end, fully automated semiconductor manufacturing and enables stable, efficient 24/7 operation of production equipment.
Standardized processes and clearly defined interfaces reduce manual intervention to a minimum. This significantly reduces potential sources of error while improving process reliability, reproducibility, and product quality.
As a globally established SEMI standard, GEM300 also enables fast, vendor-independent integration of equipment into existing 300 mm fabs.
Implementing SEMI GEM300 involves both technical and organizational challenges. One of the key tasks is ensuring correct synchronization between physical equipment movements and the corresponding logical GEM300 messages. Any deviations can quickly lead to inconsistencies in the host system.
Another important aspect is standards-compliant equipment state behavior. State transitions must be implemented clearly, reproducibly, and fully in accordance with SEMI standards to ensure stable process and material control.
Acceptance and integration testing also place high demands on the implementation, as each fab defines its own, often highly specific use cases and validation scenarios that go beyond the standard itself.
In practice, the main challenge is not SECS communication itself, but ensuring consistent interaction between all relevant GEM300 standards. Only consistent, standards-compliant overall behavior enables reliable and scalable automation in 300 mm semiconductor manufacturing.
To ensure full compliance with the latest SEMI standards, a systematic and traceable approach is essential:
- Review current standards: Ensure that the latest applicable versions of all relevant SEMI standards are implemented. The SEMI website and authorized publications should serve as the authoritative references.
- Correctly implement the equipment model and interfaces: All required modules, variables, events, alarms, and methods must be implemented completely and in compliance with the relevant specifications.
- Perform compliance and integration testing: Use SEMI-compliant test tools and validation suites to verify the standards-compliant behavior of the equipment.
- Maintain documentation and audit records: Clear documentation of the implementation, configurations, and test results is essential to ensure that compliance can be demonstrated at any time.
- Establish regular update processes: As SEMI standards continue to evolve, processes for reviewing new versions and implementing targeted software updates should be firmly established.
Development, commissioning, and support effort can be significantly reduced through a clear and structured approach. A modular, standards-compliant software design using reusable components for SECS/GEM and EDA helps simplify development and makes changes easier to implement.
Early testing with simulators or virtual equipment also helps identify errors before commissioning. This can prevent time-consuming corrections later in the project.
During operation, automated testing and continuous monitoring can reduce support effort. Clear and complete documentation is equally important. This includes the data model, interface descriptions, and test reports, which enable faster analysis and simplify maintenance and troubleshooting.
Training for operating and maintenance personnel also contributes to stable and reliable operation. This ensures that essential knowledge remains available even when teams change.
Finally, using proven standard tools such as FabLink® from Kontron AIS simplifies integration while significantly reducing the effort required for maintenance and future extensions.