Introduction
Assembly, Testing, Marking and Packaging (ATMP) is the final stage of the semiconductor manufacturing value chain, where fabricated semiconductor chips are assembled into usable packages, tested for quality and performance, marked with identification details and packaged for commercial use.
ATMP facilities play a crucial role in converting fabricated semiconductor wafers into finished chips ready for integration into electronic devices.
Semiconductor Value Chain
- Chip Design
- Wafer Fabrication (Fab)
- Assembly, Testing, Marking and Packaging (ATMP)
- Distribution and Integration into Electronic Products
Note: Unlike a Fab, an ATMP facility does not manufacture semiconductor wafers; it processes fabricated chips into market-ready products.
Components of ATMP
1. Assembly
- Semiconductor wafers are cut into individual chips (dies).
- Chips are mounted onto a package substrate.
- Electrical connections are made using wire bonding or flip-chip technology.
2. Testing
- Chips are tested for:
- Electrical performance.
- Functional accuracy.
- Reliability.
- Thermal performance.
- Defective chips are identified and rejected.
3. Marking
- Each chip is marked with:
- Manufacturer’s name.
- Product code.
- Batch number.
- Traceability information.
4. Packaging
- Chips are enclosed in protective packages.
- Packaging protects against heat, moisture, vibration and physical damage.
- Enables integration into electronic devices.
Importance
Enhances Reliability
Ensures only quality-tested chips reach the market.
Value Addition
Adds significant value after wafer fabrication.
Supply Chain Resilience
Strengthens domestic semiconductor manufacturing capability.
Employment Generation
Creates skilled jobs in electronics manufacturing and testing.
Supports Electronics Manufacturing
Provides essential inputs for sectors such as:
- Consumer electronics.
- Automobiles.
- Telecommunications.
- Defence.
- Medical devices.
- Artificial Intelligence (AI).
India and ATMP
Under the Semicon India Programme and the India Semiconductor Mission (ISM), India is promoting ATMP facilities to develop a complete semiconductor ecosystem.
Major Approved ATMP Projects
Tata Electronics
- Location: Jagiroad, Assam.
- Semiconductor assembly and testing facility.
- One of India’s largest semiconductor packaging projects.
CG Power–Renesas–Stars Microelectronics
- Location: Sanand, Gujarat.
- Focuses on assembly, testing and packaging of semiconductor chips.
Kaynes Semicon
- Location: Sanand, Gujarat.
- ATMP and outsourced semiconductor assembly facility.
Difference Between Fab and ATMP
| Feature | Semiconductor Fab | ATMP |
| Primary Function | Manufactures semiconductor wafers | Assembles, tests, marks and packages chips |
| Position in Value Chain | Manufacturing stage | Post-fabrication stage |
| Capital Requirement | Very high | Lower than a Fab |
| Technology Complexity | Extremely high | High but comparatively lower |
| Final Output | Silicon wafers with integrated circuits | Finished semiconductor chips ready for use |
Challenges
- Dependence on imported packaging materials and equipment.
- Need for highly skilled workforce.
- Rapid technological advancements in chip packaging.
- Global competition from established ATMP hubs.
Way Forward
- Expand ATMP capacity under the India Semiconductor Mission.
- Encourage domestic manufacturing of packaging materials and equipment.
- Promote advanced packaging technologies such as 3D packaging and chiplets.
- Strengthen industry–academia collaboration for skill development.
- Integrate ATMP with domestic fabrication and chip design ecosystems.
Conclusion
Assembly, Testing, Marking and Packaging (ATMP) is a vital link in the semiconductor value chain that transforms fabricated wafers into usable semiconductor chips. By promoting ATMP facilities under the Semicon India Programme, India is strengthening its semiconductor ecosystem, enhancing supply-chain resilience and moving towards technological self-reliance under Aatmanirbhar Bharat.
