Inventory and Reduction
We follow the ISO 14064-1:2018 standards for GHG inventories, covering Taiwan and China Facilities to assess overall GHG emissions and set reduction goals. The 2023 GHG emissions intensity target was set below 11, with performance at 9.32. In 2023, Scope 1 and Scope 2 emissions totaled 970,082 t-CO2e, a 3.0% increase from 2022, with GHG emission intensity increasing by 39% to 9.32. The 2023 increase is due to expanded reporting boundaries, which now include Chungyuan, Chung Hsing, Nanshan Plant, and Subtron Technology. As a result, the baseline year for GHG reduction has been adjusted to 2023, reflecting an overall rise in GHG emissions trends.
GHG Emissions and Intensity
Scope 1 of Taiwan Facilities (tCO2e)
Scope 2 of Taiwan Facilities (tCO2e)
Scope 3 of Taiwan Facilities (tCO2e)
Scope 1 of China Facilities (tCO2e)
Scope 2 of China Facilities (tCO2e)
Scope 3 of China Facilities (tCO2e)
GHG Emission Intensity
(tCO2e/Million in Revenue)
Note 1: Data for Taiwan facilities from 2017 to 2021 excludes Chungyuan, Chung Hsing, Yangmei, and Shanying II Plants. The 2022 data excludes Chungyuan, Chung Hsing, and Nanshan Plants. In 2023, Dacheng and Hsinnong Plants are also excluded but will be included in next year's inventory once production normalizes.
Note 2: The emission factors of 0.495, 0.5703, 0.5703, and 0.5271 t-CO2e/MWh for Taiwan, Eastern China, Central China, and Southern China, respectively, in 2023. For other years, please refer to the ESG Report.
Note 3: The base year for GHG reduction has been adjusted to 2023 due to expanded reporting boundaries. The Net Zero Roadmap uses 2020 as the baseline year, with 2025 as the carbon peaking year. Reduction targets focus on Scope 1 and Scope 2 GHG emissions.
Note 4: GWP of AR5 is used for Unimicron and Unimicron Technology (ShenZhen), while AR6 GWP is used for Subtron Technology, Unimicron-FPC Technology (Kunshan), Unimicron Technology (Huangshi), Unimicron Technology (Suzhou), and Unimicron Technology (Kunshan).
Note 5: According to ISO 14064-3, Scope 1 and 2 are subject to reasonable assurance, while Scope 3 is subject to limited assurance.
Participation in Carbon Trading
ShenZhen City in Mainland China launched its carbon emissions trading scheme in June 2013. Companies with monthly emissions exceeding 10,000 tons, such as Unimicron Technology (ShenZhen), which averages 15,000 tons per month in 10~12 years, are required to participate in this scheme. Unimicron Technology (ShenZhen) joined the ShenZhen carbon trading mechanism in 2014. By 2022, the company’s cumulative carbon emissions totaled approximately 988,200 tons. The quota for 2022 was 66,500 tons, with a total cumulative quota of 1,104,000 tons from 2013 to 2022. After accounting for offsets, a balance of 115,800 tons remains, held temporarily without trading. In recent years, the company's annual carbon emissions have exceeded its quotas, and the remaining quotas will be used to offset in the future. The 2023 carbon trading mechanism will be implemented in July 2024.
Carbon Reduction Targets
Unimicron monitors the carbon emission intensity of each plant annually and has developed a three-phase carbon reduction plan based on global trends and government policies. Phase 1 (2021-2025): Set 2025 as the carbon peak yearNote, factoring in the Group's expansion. Continue implementing energy-saving improvements, solar photovoltaic installations and renewable energy purchases, to achieve an 8% reduction in emissions by 2025 compared to the projected peak. Phase 2 (2026-2030): Aim for a 30% reduction in carbon emissions by 2030 from the peak through additional renewable energy purchases and green power installations. Phase 3 (2031-2050): Target carbon neutrality by 2050, with ongoing efforts to enhance energy conservation and increase renewable energy purchases.
Note: Carbon peak refers to the estimated GHG emissions if no carbon reduction measures are implemented.
