| 1. | EXECUTIVE SUMMARY | 
| 1.1. | Sustainability is of growing importance in the electronics industry | 
| 1.2. | Europe aiming to double global market share of integrated circuits | 
| 1.3. | International supply chain comes with heavy emissions burden | 
| 1.4. | Large share of renewables in developed countries could reduce 'reshoring' cost premium | 
| 1.5. | Digital manufacturing can facilitate sustainable electronics manufacturing | 
| 1.6. | Recycling/reuse initiatives are a strong opportunity | 
| 1.7. | One third of emissions from the electronics industry are produced by integrated circuits | 
| 1.8. | Market status of FR4 alternatives | 
| 1.9. | Sustainability benefits of PCB manufacturing with 'print and plate' | 
| 1.10. | Comparing component attachment types | 
| 1.11. | Market readiness of different solders and ECAs | 
| 1.12. | Etchant produces largest amount of hazardous waste in PCB manufacturing | 
| 1.13. | Ingot sawing costs industry billions in lost silicon and wasted energy | 
| 1.14. | Gallium nitride is more sustainable and lower cost than silicon for ICs | 
| 1.15. | PragmatIC developing thin film alternatives to silicon with 1000x lower embedded energy | 
| 1.16. | Dry (plasma) etching could provide long-term savings and reduce toxic waste in IC manufacturing | 
| 1.17. | Physical vapour deposition may be the best choice for IC copper interconnects | 
| 1.18. | Water conservation increasing among major players | 
| 1.19. | Samsung operating global take-back schemes | 
| 1.20. | Key takeaways (i) | 
| 1.21. | Key takeaways (ii) | 
| 1.22. | Key takeaways (iii) | 
| 2. | INTRODUCTION | 
| 2.1. | The electronics industry today | 
| 2.2. | Sustainability is of growing importance in the electronics industry | 
| 2.3. | EU aims to cut emissions by >55 % by 2030 | 
| 2.4. | 'Fit for 55' expected to drive forward a sustainable electronics industry within the EU | 
| 2.5. | Global electronics industry may follow suit | 
| 2.6. | Large share of renewables could benefit low-cost manufacturing | 
| 2.7. | Ubiquitous electronics require sustainable solutions | 
| 2.8. | Engaging with sustainability promotes new opportunities in the electronics industry | 
| 2.9. | Conventional electronics manufacturing poses obstacles to sustainability challenge | 
| 2.10. | Sustainability regulations around the world impacting the electronic industry | 
| 2.11. | Carbon prices are expected to rise | 
| 2.12. | The SEC is cracking down on greenwashing | 
| 2.13. | Manufacturing strategies to increase speed and reduce embedded energy | 
| 2.14. | Digital manufacturing can facilitate sustainable electronics manufacturing | 
| 2.15. | Recycling/reuse initiatives for electronics gain traction | 
| 2.16. | International supply chain comes with heavy emissions burden | 
| 2.17. | Traditional PCBs: Emissions reductions enabled by on-site prototyping | 
| 2.18. | Report structure (i): PCB value chain | 
| 2.19. | Report structure (ii): Integrated circuits (ICs) value chain | 
| 3. | MARKET FORECASTS | 
| 3.1. | Forecasting methodology | 
| 3.2. | PCB substrate production | 
| 3.3. | PCB substrate revenue | 
| 3.4. | Patterning and metallization: Rigid PCBs | 
| 3.5. | Patterning and metallization: Flexible PCBs | 
| 3.6. | Component attachment materials: Rigid PCBs | 
| 3.7. | Component attachment materials: Flexible PCBs | 
| 3.8. | Materials for integrated circuits (i) | 
| 3.9. | Production of integrated circuits (ii) | 
| 4. | EMERGING SUSTAINABLE MANUFACTURING METHODS OF PRINTED CIRCUIT BOARDS | 
| 4.1. | PCB manufacturing: Chapter structure | 
| 4.1.1. | Introduction: History of traditional PCBs | 
| 4.1.2. | Conventional PCB manufacturing | 
| 4.1.3. | Manufacturing of PCBs concentrated in APAC | 
| 4.1.4. | Key areas for sustainability within PCBs | 
| 4.1.5. | Sustainable materials for PCB manufacturing | 
| 4.2. | PCB Design Options | 
| 4.2.1. | Introduction: Design options for PCBs | 
| 4.2.2. | Double-sided and multi-layered PCBs allow extra  complexity and reduce board size | 
| 4.2.3. | Flexible PCBs require new innovation | 
| 4.2.4. | Moving away from rigid PCBs will enable new applications | 
| 4.2.5. | An introduction to in-mold electronics | 
| 4.2.6. | IME manufacturing process flow | 
| 4.2.7. | Motivation and challenges for IME | 
| 4.2.8. | How sustainable is IME? | 
| 4.2.9. | IME can reduce plastic usage by more than 50 % | 
| 4.2.10. | Key takeaways: PCB design options | 
| 4.3. | Substrate Choices | 
| 4.3.1. | Introduction: Substrate choices | 
| 4.3.2. | FR4 uses toxic halogenated substances | 
| 4.3.3. | Legislation on halogenated substances is becoming more restrictive | 
| 4.3.4. | Halogens pose significant health and safety threat as electronics become smaller | 
| 4.3.5. | Halogen-free FR4 presents numerous advantages | 
| 4.3.6. | Household names adopting low or halogen-free technology | 
| 4.3.7. | HP working with Clariant to develop halogen-free electronics from recycled materials | 
| 4.3.8. | SWOT Analysis: Halogen-free FR4 | 
| 4.3.9. | Bio-based printed circuit boards | 
| 4.3.10. | Switching to bio-based PCBs involves new optimization | 
| 4.3.11. | Challenges facing bio-plastics | 
| 4.3.12. | Polyimide is the leading non-FR4 alternative | 
| 4.3.13. | Application areas for flexible (bio) polyimide PCBs | 
| 4.3.14. | (Bio)polyimide could be the material of the future for flexible electronics | 
| 4.3.15. | PET is much more cost-effective than PI | 
| 4.3.16. | Jiva has developed the first fully recyclable bio-based PCB | 
| 4.3.17. | Microsoft working on sustainable PCBs | 
| 4.3.18. | Dell's Concept Luna laptop using flax-based PCBs | 
| 4.3.19. | Paper-based PCBs could be an environmentally friendly and low-cost solution | 
| 4.3.20. | Arjowiggins printing circuits onto paper | 
| 4.3.21. | SWOT Analysis: Bio-based materials | 
| 4.3.22. | Market status of FR4 alternatives | 
| 4.3.23. | Innovation opportunities for FR4 alternatives | 
| 4.3.24. | Sustainability index: PCB substrates | 
| 4.3.25. | Key takeaways: FR4 alternatives | 
| 4.4. | Patterning and Metallization | 
| 4.4.1. | Introduction: Patterning and metallisation | 
| 4.4.2. | Conventional metallization is wasteful and harmful | 
| 4.4.3. | Common etchants pose environmental hazards | 
| 4.4.4. | Etchant regeneration could make wet etching more sustainable | 
| 4.4.5. | Dry phase patterning removes sustainable hurdles associated with wet etching | 
| 4.4.6. | Print-and-plate could revolutionize PCB manufacturing | 
| 4.4.7. | Sustainability benefits of print-and-plate | 
| 4.4.8. | Print-and-plate for in-mold printed circuits | 
| 4.4.9. | Laser induced forward transfer (LIFT): Combining the best of inkjet and laser direct structuring | 
| 4.4.10. | Operating mechanism of laser induced forward transfer (LIFT) | 
| 4.4.11. | Target applications for laser induced forward transfer | 
| 4.4.12. | Copper inks more sustainable and cost-effective than silver | 
| 4.4.13. | Copper inks with in-situ oxidation prevention | 
| 4.4.14. | Formaldehyde alternative for green electroless plating | 
| 4.4.15. | Innovation opportunities for patterning and metallisation processes | 
| 4.4.16. | Sustainability index: Patterning and Metallisation Processes | 
| 4.4.17. | Sustainability index: Patterning and Metallisation Materials | 
| 4.4.18. | Key takeaways: Patterning and metallization | 
| 4.5. | Component Attachment Materials and Processes | 
| 4.5.1. | Introduction: Component attachment materials | 
| 4.5.2. | Comparing component attachment types | 
| 4.5.3. | Introduction: Limitations of conventional lead-free solder | 
| 4.5.4. | Low-temperature soldering and adhesives reduces energy and enables new technology | 
| 4.5.5. | Low temperature solder alloys | 
| 4.5.6. | Low temperature solder enables thermally fragile substrates | 
| 4.5.7. | Substrate compatibility with existing infrastructure | 
| 4.5.8. | Low temperature solder could perform as well as conventional solder | 
| 4.5.9. | Low temperature solder may increase cost per PCB by extending reflow times | 
| 4.5.10. | SAFI-Tech's innovative supercooled liquid solder | 
| 4.5.11. | SWOT Analysis: Low temperature solder | 
| 4.5.12. | Electrically conductive adhesives - a component attachment material for fully flexible electronics? | 
| 4.5.13. | Key ECA innovations reduce silver content | 
| 4.5.14. | ECAs in in-mold electronics (IME) | 
| 4.5.15. | ECA curing may be more energy efficient than low temperature solder reflow | 
| 4.5.16. | SWOT Analysis: ECAs | 
| 4.5.17. | Market readiness of different solders and ECAs | 
| 4.5.18. | ECAs vs low temperature solder | 
| 4.5.19. | Innovation opportunities: Component attachment materials | 
| 4.5.20. | Sustainability index: Component attachment materials | 
| 4.5.21. | Key takeaways: Component attachment materials | 
| 4.5.22. | Introduction: Curing and reflow processes | 
| 4.5.23. | Thermal processing can be slow and time consuming | 
| 4.5.24. | UV curing of ECAs could lower heat | 
| 4.5.25. | Photonic sintering/curing could enable cheaper production and reduce factory size | 
| 4.5.26. | Near-infrared radiation can dry in seconds | 
| 4.5.27. | Market readiness of component attachment processes | 
| 4.5.28. | Sustainability index: Component attachment processes | 
| 4.5.29. | Key takeaways: Component attachment processes | 
| 4.6. | End of Life - Disposal and Recycling | 
| 4.6.1. | Introduction: End of life | 
| 4.6.2. | Etchant produces largest amount of hazardous waste | 
| 4.6.3. | Recovery of copper oxide from waste water slurry is effective but inefficient | 
| 4.6.4. | Print-and-plate could save PCB industry 200 million litres of water annually | 
| 4.6.5. | VTT's life cycle assessment of in-mold electronics | 
| 4.6.6. | IME vs reference component kg CO₂ equivalent (single IME): Cradle to gate | 
| 4.6.7. | IME vs reference component kg CO₂ equivalent (10,000 IME panels): Cradle to grave | 
| 4.6.8. | Summary of VTT's life cycle assessment | 
| 4.6.9. | Key takeaways: End of life | 
| 5. | SUSTAINABLE INNOVATION WITHIN INTEGRATED CIRCUITS | 
| 5.1. | IC manufacturing: Chapter structure | 
| 5.1.1. | Conventional integrated circuit manufacturing | 
| 5.1.2. | Key areas for sustainability within IC manufacturing | 
| 5.2. | Wafer Production | 
| 5.2.1. | Introduction to wafer production for ICs | 
| 5.2.2. | Conventional silicon wafer production | 
| 5.2.3. | Ingot sawing costs industry billions in lost silicon and wasted energy | 
| 5.2.4. | Innovation within the silicon PV industry could benefit integrated circuits | 
| 5.2.5. | Gallium nitride is more sustainable and lower cost than silicon | 
| 5.2.6. | Gallium nitride not susceptible to chip shortage concerns | 
| 5.2.7. | SWOT analysis: Gallium nitride ICs | 
| 5.2.8. | PragmatIC developing thin film alternatives to silicon with 1000x lower embedded energy | 
| 5.2.9. | SWOT analysis: PragmatIC's flexible ICs | 
| 5.2.10. | Fully printed organic ICs are in early stage development | 
| 5.2.11. | SWOT analysis: Organic ICs | 
| 5.2.12. | Sustainability index: Wafer production | 
| 5.2.13. | Key takeaways: Wafer manufacturing | 
| 5.3. | Oxidation | 
| 5.3.1. | Introduction to oxidation | 
| 5.3.2. | Recycling acid etchants reduces highly toxic waste and increases supply chain security | 
| 5.3.3. | Thinner gate oxides reduce time and energy consumption during oxidation | 
| 5.3.4. | Metal oxides could replace silicon oxide in the future | 
| 5.3.5. | Solution-based hafnium oxide could reduce fabrication time | 
| 5.3.6. | Market readiness of oxide options | 
| 5.3.7. | Sustainability index: Oxidation | 
| 5.3.8. | Key takeaways: Oxidation | 
| 5.4. | Patterning and Surface Doping | 
| 5.4.1. | Introduction: Patterning and surface doping | 
| 5.4.2. | Wet chemical etching is the most conventional method but wasteful | 
| 5.4.3. | Dry (plasma) etching could provide long-term savings and reduce toxic waste | 
| 5.4.4. | Nano OPS' 'fab in a tool' could cut IC costs by 2 orders of magnitude | 
| 5.4.5. | Surface doping - room for improvement? | 
| 5.4.6. | Sustainability index: Patterning | 
| 5.4.7. | Key takeaways: Patterning and doping | 
| 5.5. | Metallization | 
| 5.5.1. | Introduction: Metallization | 
| 5.5.2. | The return of metal gates may increase costs | 
| 5.5.3. | Due diligence restrictions on tantalum sourcing imposed by EU policy | 
| 5.5.4. | Printed metal gates for organic thin film transistors | 
| 5.5.5. | Physical vapour deposition may be the best choice for copper interconnects | 
| 5.5.6. | Sustainability index: Metallization | 
| 5.5.7. | Key takeaways: Metallization | 
| 5.6. | End of Life | 
| 5.6.1. | Introduction: End of life | 
| 5.6.2. | One third of emissions from the electronics industry are produced by integrated circuits | 
| 5.6.3. | Increasing renewable energy can result in substantial emissions reductions | 
| 5.6.4. | Early testing minimizes waste | 
| 5.6.5. | Water conservation increasing among major players | 
| 5.6.6. | Samsung operating global take-back schemes | 
| 5.6.7. | Key takeaways: End of life | 
| 6. | COMPANY PROFILES | 
| 6.1. | Alpha | 
| 6.2. | Altana | 
| 6.3. | CondAlign | 
| 6.4. | DP Patterning | 
| 6.5. | Elephantech | 
| 6.6. | imec | 
| 6.7. | Intel | 
| 6.8. | IOTech | 
| 6.9. | Kieron | 
| 6.10. | NanoOPS | 
| 6.11. | PragmatIC | 
| 6.12. | SAFI-Tech | 
| 6.13. | Samsung | 
| 6.14. | Sunray Scientific | 
| 6.15. | TactoTek | 
| 6.16. | TSMC | 
| 6.17. | VTT | 
| 6.18. | In2tec |