The semiconductor industry has long thrived on clear roadmaps, clear node targets, and clear performance metrics. But as the boundaries of physics and economics tighten, clarity is giving way to ambiguity. Erik Hosler, a semiconductor consultant known for his work on EUV and advanced patterning, captured this shift when he described the need to broaden the scope of development.
In a world where Moore’s Law no longer guarantees predictable scaling, the industry must find new ways to measure progress. It demands not only technical experimentation but also intellectual flexibility. Asking the right questions is becoming just as important as delivering concrete answers. As materials grow more complex and processes become more interdependent, the ability to question assumptions has become a core innovation skill.
The Myth of the Linear Roadmap
For decades, node scaling was synonymous with advancement. Shrinking features meant higher density, faster speeds, and lower power, all wrapped into a neat cadence of two-year cycles. But in recent years, this rhythm has fractured.
Advanced nodes such as 5 nm and 3 nm have pushed design complexity to the brink. Mask costs have soared, etch and deposition steps have multiplied, and yield issues have become more difficult to predict. And while EUV lithography has offered a path forward, it even faces challenges in resist sensitivity, stochastic variability, and tool throughput.
This disruption does not mean progress has halted. It simply means that success looks different now. Metrics like system-level performance, energy efficiency, and manufacturability are beginning to replace traditional transistor-centric benchmarks. It is no longer enough to hit a number on a roadmap. The industry must also ask: Why are we building this, and for whom?
From Curiosity to Capability
This transition is visible in the expanding scope of the SPIE Advanced Lithography conference, where patterning discussions now touch on quantum effects, MEMS, MOEMS, and photonic integration. Erik Hosler emphasizes, “Last year, we included MEMS and MOEMS, and we will keep expanding to quantum to make this a place to ask questions … Lots of great things are going on, and something will emerge.”
It highlights a subtle but vital change in attitude. Rather than pursuing narrowly defined technical milestones, the industry is fostering environments that encourage exploration. These environments are not just labs or conferences, but are cultural spaces that allow for disciplined speculation and cross-disciplinary engagement.
In such a space, asking a good question becomes a valuable act. It draws out hidden assumptions, opens new problem spaces, and encourages a diversity of perspectives. Engineers, physicists, and chemists alike are being asked to reconsider what they thought they knew and how it might apply to challenges that do not yet have names.
New Problems, New Frameworks
Consider the rise of stochastic defects in advanced lithography. These random events, once considered minor statistical noise, are now central to process control and yield modeling. Mitigating them demands not only better tools and materials but also a deeper understanding of the chemical and physical processes involved. That, in turn, requires asking questions about photon-matter interactions that were once left to theoretical physics.
The same is true for new photoresist platforms. Molecular resists and metal oxide chemistries are being developed with attention to both resolution and line-edge roughness. Yet these materials also introduce new variables, such as outgassing behaviors or post-exposure dynamics, that defy easy characterization. Development, in this context, means asking the kinds of questions that reveal underlying trade-offs.
The Role of Interdisciplinarity
Asking better questions also depends on asking them in the right company. One of the hallmarks of recent semiconductor progress has been the rise of collaborative ecosystems. Imec’s AttoLab, for instance, brings together laser physicists, materials scientists, and process engineers to understand resist behavior at femtosecond and attosecond timescales.
Similarly, companies like ASML, Lam Research, and Synopsys are engaging in joint projects that merge design, manufacturing, and software. These partnerships are intellectual exchanges. Each partner brings a different lens, helping to refine the questions being asked and avoid the blind spots that come from working in isolation.
This collaborative mindset is filtering into education as well. Universities are launching interdisciplinary programs where students learn not only how to use tools but how to think across silos. They are encouraged to study the economic, environmental, and social implications of modern technologies, reinforcing the idea that development is a multi-layered problem.
Questioning as Strategy
Asking questions is not a rejection of rigor. On the contrary, it is a commitment to relevance. In an industry that has historically been defined by measurable progress, embracing open-ended inquiry can feel risky. But the alternative, clinging to outdated metrics, risks irrelevance.
A question-driven approach allows for greater adaptability. If a process fails, teams can pivot more quickly. If a material behaves unexpectedly, the framework already exists to investigate and incorporate that knowledge. This agility is essential in a landscape where tools, costs, and customer demands shift rapidly.
This mindset also informs how companies think about risk. Instead of betting everything on a single node or technology, they are investing in portfolios of options. These include emerging technologies like nanoimprint lithography, curvilinear mask synthesis, and AI-driven defect classification. Each of these brings its uncertainties, but they also bring new questions that may lead to breakthroughs.
A Culture of Inquiry
Fostering this approach means building a culture that values curiosity. Leaders must create room for experimentation, tolerate short-term failure, and reward intellectual courage. It is not easy in a field where performance, yield, and cost targets dominate quarterly reviews, but the payoff can be immense.
Some of the most impactful innovations in semiconductor history, such as immersion lithography, FinFETs, or EUV itself, began with questions that challenged prevailing logic. They did not emerge from brute-force extensions of existing roadmaps. They came from individuals and teams that saw a different path and had the tools and support to explore it.
A Roadmap of Questions
In the coming years, the semiconductor industry will face even greater uncertainty. Quantum computing, edge AI, and sustainable manufacturing are just a few of the frontiers that defy straightforward planning. In this environment, the most important roadmap may be the one built from good questions. What does progress mean when transistor counts plateau? How do we measure value when performance gains are nonlinear? What responsibilities do we have to the ecosystems, technical and environmental, that support our innovations?
These are not rhetorical questions. They are design prompts. They shape the tools we build, the partnerships we form, and the futures we envision. This call to keep asking questions is more than an observation. It is a blueprint for enduring relevance in a field that can no longer afford to think in straight lines. In the space beyond nodes, curiosity is not a detour. It is the way forward.
