IBM, a renowned technology giant, has announced its groundbreaking NanoStack architecture, which could potentially revolutionize the semiconductor industry by enabling manufacturers to pack an unprecedented 100 billion transistors onto a chip the size of a fingernail. The current industry standard for chips, measured in nanometres (nm), hovers around two nanometres; however, IBM's new technology is equivalent to approximately 0.7nm, making it the world's first known chip tech below 1nm. Despite the promising projections, it will take several years before this technology becomes ready for mass production. In tests, IBM's prototype demonstrated a 50% improvement in performance and a 70% increase in energy efficiency compared to its own 2nm chip. IBM's NanoStack architecture represents a significant leap forward in the realm of transistor technology, as these components form the building blocks of silicon chips that power various electronic devices such as smartphones, gaming consoles, laptops, data center computers, and artificial intelligence applications. The more transistors manufacturers can cram onto a chip, the greater its computing power, enabling more complex tasks to be performed. This trend, known as Moore's Law, has driven the exponential growth in transistor density for decades, but as billions of transistors now populate some chips, maintaining this pace of growth is becoming increasingly challenging. To extend the lifespan of Moore's Law and address these challenges, chip designers have shifted their focus towards 3D alternatives, where transistors are made taller to fit more efficiently in a vertical space. IBM's approach, however, involves not only altering the shape of the transistors but also layering sheets of them on top of each other. Professor Alan Woodward, a computer scientist at Surrey University, likens this method to constructing a 100-story skyscraper, as opposed to conventional 30-50 story buildings that IBM's closest competitors such as Samsung and Intel are currently working on with their own 3D chip work. IBM's NanoStack architecture represents the most ambitious proposal among current 3D chip design efforts, according to Professor Woodward. The challenges faced by 3D chip designers include heat management, as transistors can generate significant amounts of heat during operation, and preventing layers from becoming too thin, which can hinder the switching off of individual transistors and cause malfunctions in the chip. Nonetheless, IBM's proposals for sub-1nm chip technology remain a promising step forward in addressing these challenges and pushing the boundaries of what is possible in semiconductor design.