Semiconductor Assembly and Test Services Market - Strategic Insights and Forecasts (2026-2031)

Semiconductor Assembly and Test Services Market Size:

The semiconductor assembly and test services market, at a 7.84% CAGR, is projected to expand to USD 85.506 billion in 2031 from USD 54.372 billion in 2025.

Semiconductor assembly and test services refer to the processes involved in the manufacturing and packaging of semiconductor devices. These services are crucial in the electronics industry, as they are responsible for ensuring that semiconductor devices are properly assembled, tested, and packaged before they are shipped to customers. Semiconductor assembly and test services are offered by specialized companies that provide outsourced manufacturing and testing services to semiconductor device makers.

Semiconductor assembly involves the process of mounting semiconductor chips onto a package, such as a printed circuit board (PCB). The process also involves the wire bonding of the chip to the package, encapsulating the package, and testing the device for functionality. Assembly services are essential for companies that do not have in-house assembly capabilities or need additional capacity to meet customer demand. Companies that offer assembly services have specialized equipment and expertise in handling semiconductor devices and packaging.

Semiconductor test services involve the testing of the assembled semiconductor devices to ensure that they meet the required specifications. Testing can be performed at different stages of the manufacturing process, including wafer-level testing, where the devices are tested before they are separated and packaged and final testing, where the devices are tested after they are packaged. Testing services are critical for ensuring that semiconductor devices are reliable and function correctly, as they help to identify defects and potential failure modes.

Semiconductor Assembly and Test Services Market Driver:

The semiconductor assembly and test services market is driven by increasing demand for customized packaging solutions and the growing trend toward miniaturization of electronic devices.

• Increasing demand for customized packaging solutions

With the proliferation of diverse applications and technologies, semiconductor devices require a range of packaging options to meet specific application requirements. These packaging options include flip-chip, wafer-level packaging, system-in-package, and fan-out wafer-level packaging. The customization of packaging solutions requires specialized equipment, expertise, and capabilities. Semiconductor assembly and test services companies that can offer customized packaging solutions that meet the specific requirements of customers are likely to be in high demand.

• Growing trend toward miniaturization of electronic devices

As the demand for small, lightweight, and portable devices increases, there is a growing need for smaller and more compact semiconductor packages. This trend is driving the development of advanced packaging technologies such as system-in-package and wafer-level packaging. The ability of semiconductor assembly and test services companies to provide these advanced packaging technologies is a significant driver of their growth.

Semiconductor Assembly and Test Services Market Key Developments:

• October 2025: Amkor Technology broke ground on its new U.S. semiconductor advanced packaging and test campus in Arizona, expanding its investment to $7 billion to service the growing AI and HPC markets.

• October 2025: ASE Group held a groundbreaking ceremony for its K18B factory in Taiwan, a NT$17.6 billion investment scheduled to expand capacity for advanced packaging processes like CoWoS and SiP.

• April 2025: BE Semiconductor Industries (Besi) reported an 8.2% sequential rise in Q1-2025 order bookings, driven largely by Asian subcontractors ramping up AI-focused advanced packaging work (notably hybrid-bonding).

Semiconductor Assembly and Test Services Market Segment Analysis: 

• Based on vendor, the semiconductor assembly and test services market is expected to witness positive growth in outsourced segment.

Outsourced vendors are companies that provide semiconductor assembly and testing services to other companies. Outsourced vendors typically have a specialized workforce and a well-established network of manufacturing partners, allowing them to offer a wide range of services at a lower cost than internal vendors. They also have the flexibility to adjust production capacity based on market demand, making them an attractive option for companies looking to scale their operations quickly.

Additionally, this segment is also benefitted by government initiatives. Outsourced semiconductor assembly and test services (OSAT) companies are crucial to the semiconductor industry as they act as subcontract manufacturers for semiconductor devices. The companies perform the last half of the manufacturing required to make a chip and validate its functionality before they are shipped to become part of devices. The CHIPS Act, a bipartisan legislation passed in August 2022, aimed to enhance competitiveness, innovation, and national security in the semiconductor industry. The act provided a total of US$52.7 billion, with US$39 billion allotted to U.S. manufacturers in the form of competitive grants to support the financing of facilities and equipment construction, expansion, and modernization.

Semiconductor Assembly And Test Services Market Geographical Outlook:

• Asia Pacific accounted for a significant share of the global semiconductor assembly and test services market.

Based on geography, the semiconductor assembly and test services market is segmented into North America, South America, Europe, the Middle East and Africa and Asia Pacific. The Asia Pacific region is a significant player in the semiconductor assembly and test services market, due to the presence of several key players and the increasing demand for consumer electronics in countries such as China, Japan, South Korea, and Taiwan. Furthermore, it has a large pool of skilled labor, a well-established supply chain, and government support for the semiconductor industry.

List of Top Semiconductor Assembly and Test Services Companies:

• Amkor Technology

• ASE Group

• Siliconware Precision Industries Co., Ltd.

• JCET Group Co.

• Integra Technologies

Semiconductor Assembly and Test Services Market Scope:

Semiconductor Assembly And Test Services Market Segmentation:

• By Type

  • Assembly and Packaging

  • Testing

• By Vendor

  • Internal

  • Outsourced

• By Industry Vertical

  • Consumer Electronics

  • Automotive

  • Medical

  • Industrial

  • Others

• By Geography

  • North America

    • USA

    • Canada

    • Mexico

  • South America

    • Brazil

    • Argentina

    • Others

  • Europe

    • Germany

    • France

    • United Kingdom

    • Spain

    • Others

  • Middle East and Africa

    • Saudi Arabia

    • UAE

    • Others

  • Asia Pacific

    • China

    • India

    • Japan

    • South Korea

    • Indonesia

    • Thailand

    • Others

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