Ten Key Semiconductor Technologies Driving Computing Speed and Energy Efficiency

Modern chips rely on technologies that control current, store information, and transmit data between components. Their performance reflects advances in transistor design, manufacturing precision, materials, and packaging. These developments support a wide range of applications, from smartphones and computers to electric vehicles and data centers. Below are ten important semiconductor technologies, how they work, and their significance.

Advantages of FinFET Transistors

1. FinFET Transistor: FinFET is a type of transistor with a narrow silicon channel shaped like an upright fin, rather than a flat structure. The gate wraps around three sides of each fin, controlling the current that flows through. This design improves control over unwanted current leakage, which becomes particularly important as transistors shrink. FinFET helps manufacturers enhance the performance and energy efficiency of processors in smartphones, computers, and servers.

2. Gate-all-around Transistor: Gate-all-around transistors surround the channel carrying current on all sides. This can be achieved using thin silicon nanosheets or vertically stacked nanowires, as exemplified by Intel's RibbonFET. The surrounding gate provides tighter control over current flow, helping to address the challenges of further shrinking transistors. Engineers can also adjust the channel width to balance performance, power consumption, and the space occupied by the device.

Extreme Ultraviolet Lithography Technology

3. Extreme Ultraviolet Lithography Technology: Extreme ultraviolet lithography uses light with a wavelength of 13.5 nm to transfer circuit patterns onto the photosensitive coating of semiconductor wafers. This process requires specialized mirrors and a vacuum environment, as EUV light is rapidly absorbed by many materials. EUV enables finer patterning and can reduce the number of patterning steps required for certain chip layers. High numerical aperture EUV further improves optical resolution, although its wavelength or process node name does not directly describe the size of each transistor.

4. Atomic Layer Deposition and Etching: Atomic layer deposition builds ultra-thin material films through sequentially controlled surface reactions. Atomic layer etching uses complementary sequences to modify surfaces and then remove the modified material. These techniques help manufacturers cover complex structures with precise control and remove materials. As three-dimensional devices increase, this precision becomes increasingly important, as small changes can affect electrical behavior and manufacturing consistency.

5. Backside Power Delivery: Backside power delivery transmits power through the opposite side of the wafer, relative to the front-side signal connections. This separates two traditionally competing wiring networks. This arrangement can alleviate routing congestion and improve the way power reaches densely packed devices. Intel's PowerVia is an example of this implementation, but manufacturing these structures requires additional processing, including wafer thinning and precise backside connections.

6. Chiplets and Advanced Packaging: Chiplet designs allocate system functions to small semiconductor chips connected within a single package. Different chips can handle computing, memory, or input/output, using manufacturing processes suited to their respective needs. Advanced packaging provides dense connections, allowing these components to work together, whether side by side or stacked vertically. This approach offers design flexibility and component reuse while making communication overhead, testing, cost, and thermal management important engineering considerations.

Features of High Bandwidth Memory

7. High Bandwidth Memory: High Bandwidth Memory vertically stacks multiple DRAM chips and connects them through dense interconnects, including through-silicon vias. These stacks are positioned close to the processor and use wide interfaces to transmit large amounts of bits in parallel. This arrangement helps meet the demands of workloads such as artificial intelligence processing and scientific computing. HBM, used as working memory, requires power to retain information, distinguishing it from persistent storage technologies like NAND Flash.

8. 3D NAND Flash Memory: 3D NAND increases storage density by arranging memory cells across multiple vertical layers within a chip. This approach exceeds the capacity achievable by manufacturers through merely shrinking flat-arranged cells. Unlike DRAM, NAND Flash retains stored information when power is cut, making it suitable for solid-state drives and other storage products. Its performance and durability depend on factors beyond the number of layers, including the bit count per cell, controller design, and error correction.

9. Silicon Carbide and Gallium Nitride: Silicon carbide and gallium nitride are wide bandgap semiconductor materials used for controlling and converting power. Their properties provide advantages in applications requiring efficient switching, high power density, or high voltage operation. Silicon carbide is widely used in applications like electric vehicle inverters, while gallium nitride supports compact, fast-switching power converters. These materials are not interchangeable, and engineers choose based on voltage, frequency, thermal requirements, reliability, and cost.

10. Silicon Photonics: Silicon photonics integrates optical components into semiconductor platforms to leverage light for transmitting information. Waveguides direct light, modulators encode data, and photodetectors convert incoming light signals into electrical signals. This technology helps address bandwidth, distance, and energy limitations in communication and computing infrastructure. Its role in optical interconnects complements electronic processing by improving data transmission between components and systems.