ST is committed to reducing its energy consumption and associated carbon footprint through energy efficiency and conservation programs along with the purchase of CO2-free and renewable energies. ST carefully monitors and anticipates changes in the energy market to mitigate business exposure to climate change. 

Since the 1990s, ST has been working to reduce its indirect Greenhouse Gases (GHG) emissions under scope 2 of the GHG Protocol. These initiatives have already halved our energy consumption per production unit, and we continue to work hard to make further improvements in manufacturing efficiency. 

Ed Dobson,  Facilities Director, Front-end Manufacturing & Technology

“Energy management has been a key aspect of ST's environmental strategy since early 1990s. We are committed to mitigate the impact our manufacturing plants have on climate change, in line with the GHG Protocol.

From ambitious saving targets, ST has reached a high level of energy efficiency performance, and we continuously strive to manage any further watts of energy we could save."

Sourcing strategy

ST’s main source of energy is electricity, with only relatively low quantities of fuel and natural gas needed for air heating, abatement devices and general facilities. 

ST’s energy strategy covers both the generation and purchase of green energy. One of our targets in this area is to increase the amount of green energy purchased worldwide.

Our global energy sourcing department monitors and anticipates local regulations and the specific energy needs and prices for each of our sites.

ST carefully anticipates the evolving global energy market in order to increase its resilience and mitigate its business risks. When purchasing energy, we consider proposals that offer the optimum balance between cost and environmental impact.

We encourage sites to adopt renewable energy sources and greener energy technologies wherever possible, such as solar panels, which have been installed in Catania (Sicily), Geneva (Switzerland) and Grenoble (France) sites.

Energy consumption 

Production fluctuations greatly impact energy use. Before any new major facilities equipment is purchased it is assessed under the TCOO (Total Cost of Ownership) framework, which evaluates the total cost of the equipment acquisition, maintenance and energy consumption over a ten year period, for all Front-end and Back-end facilities. All ST contracts are now assessed under the TCOO framework. 


Energy conservation and efficiency 

For nearly 20 years, ST has been decreasing its energy usage, reducing its costs and gaining efficiency through continuous upgrades of its existing equipment and manufacturing processes.  ST is committed to reducing its office-related energy consumption through improvements and installation of more efficient lighting, system controls, cleanroom heating, ventilation and air conditioning. 

All ST Front-end sites are certified ISO 500011 since2013. 

ST sites also raise employee awareness and engagement through regular energy conservation campaigns and site events such as Earth Days.

Our performance and objectives are available in our latest Sustainability report.


1 ISO 50001 standard requirements include establishing, implementing, maintaining and improving an energy management system.