Singapore's carbon tax spurs green innovation in semiconductor industry

A New Economic Reality for Tech Giants

Singapore's introduction of a carbon tax is creating new economic pressures and innovation drivers for its globally significant semiconductor industry. A new review by researchers Yuanzhe Li of the University of Auckland and Nanyang Technological University, along with co-authors Yan Wang, Daphne Chong, Zhongqi Xu, Luzi Li, and Yuchun Hu, examines the effects of this policy. The study provides a detailed view of how the tax structure compels companies to confront their greenhouse gas emissions and invest in sustainable technologies.

The Price of Carbon

In 2019, Singapore began its carbon taxation policy to meet its climate commitments. The tax, initially set at SGD$5 per tonne of CO₂ equivalent, targets facilities emitting 25,000 tonnes or more annually. The price is scheduled to increase substantially, reaching SGD$25 in 2024 and projected to hit between SGD$50 and SGD$80 by 2030. This escalating cost creates a direct financial incentive for companies to measure, report, and reduce their emissions, which include not just carbon dioxide but other potent gases like perfluorocarbons PFCs and sulfur hexafluoride SF6.

The Semiconductor Sector's Environmental Footprint

The semiconductor manufacturing process is inherently energy-intensive and a major source of greenhouse gases. From raw material acquisition and silicon wafer production to complex fabrication steps like etching and chemical vapor deposition, the industry consumes vast amounts of energy. Furthermore, it relies on specific fluorinated gases, or F-gases, which have a global warming potential thousands of times greater than CO₂. The review identifies these key emission sources, providing a clear picture of the industry's environmental challenges.

Risks and Opportunities

The carbon tax presents a dual prospect for semiconductor firms. On one hand, it increases production costs, which could affect the industry's global competitiveness and raise concerns about "carbon leakage"—where companies might relocate to regions with less stringent environmental regulations. On the other hand, the tax serves as a powerful motivator for innovation. It encourages firms to adopt energy-efficient technologies, explore renewable energy sources, and develop new processes that not only lower their carbon tax liability but also can lead to long-term operational savings and a competitive market advantage.

Proven Strategies for Greener Chips

The review details several effective strategies that companies are already using to lower their emissions. These include process optimization, where firms like Samsung Electronics have reduced emissions by adjusting chamber pressure and temperature. Another approach is substituting high-impact gases with greener alternatives, a strategy successfully employed by the Taiwan Semiconductor Manufacturing Company TSMC. Advanced abatement systems, as used by GlobalFoundries, can capture and neutralize harmful F-gases at the source with high efficiency. Additionally, companies like Applied Materials have shown that remote plasma cleaning systems can cut emissions while extending equipment life.

A Potential Model for Global Policy

Singapore’s carbon tax framework is noted for its simplicity and proactive implementation, which has allowed for its adoption without major economic disruption. The researchers suggest that factors such as strong political will, a clear and simple structure targeting large emitters, and alignment with international cooperation efforts have contributed to its success. This approach could serve as a useful reference for other nations looking to implement market-based mechanisms to address climate change in their own industrial sectors. The review makes clear that while challenges exist, a well-designed carbon policy can effectively steer industry toward a more sustainable future.

Corresponding Author: Yuanzhe Li

Original Source: https://doi.org/10.1007/s44246-023-00082-0

Contributions:

Yuanzhe Li contributed to the conceptualization, methodology, validation, formal analysis, resources, supervision, and project administration; Daphne Chong contributed to the conceptualization, validation, visualization, and reviewing and editing of the study; Yan Wang and Zhongqi Xu conducted the investigation; Luzi Li, Zhongqi Xu, and Yuchun Hu prepared the original draft; Luzi Li also contributed to the validation of the study and Yan Wang contributed to the reviewing and editing of the article. All authors have read and agreed to the published version of the manuscript.