How Deposition Technologies Evolved for Advanced Semiconductor Nodes
Deposition is the process by which thin layers of material—conductors, insulators, or customised surfaces—are applied onto a semiconductor substrate, and it is the foundational step that determines whether a chip can be manufactured at all. Applied Materials has developed advanced systems across three core deposition techniques—Physical Vapor Deposition (PVD), Chemical Vapor Deposition (CVD), and Atomic Layer Deposition (ALD)—each optimised for distinct roles in the manufacturing stack.
Physical Vapor Deposition (PVD)
PVD—primarily implemented through sputtering—has been widely used for depositing metals and related materials. Applied Materials’ advanced PVD systems offer high throughput, precision, and compatibility with a variety of materials. Innovations in PVD target design have contributed to improved film quality and reduced defects, and a target lifetime control system co-developed with Taiwan Semiconductor Manufacturing Co. extends service life by dynamically adjusting operation parameters based on target age, ensuring consistent thin film quality throughout production cycles.
Chemical Vapor Deposition (CVD) and PECVD
CVD has been essential for depositing dielectric materials and epitaxial layers, with Applied Materials’ systems delivering excellent step coverage, uniformity, and control over film properties. The company introduced plasma-enhanced CVD (PECVD) methods for forming layers and shallow trench isolation regions, enabling better control over the deposition-to-etch ratio. In collaboration with Micron Technology, a PECVD shallow trench isolation process dynamically adjusts the deposition-to-etch ratio using a silane, oxygen, and inert gas mixture to ensure complete void-free filling and reliable electrical isolation between device components. According to IEEE, plasma-enhanced deposition remains one of the most actively researched areas in semiconductor process engineering.
Atomic Layer Deposition (ALD)
ALD has gained prominence for its ability to deposit ultra-thin, conformal films with atomic layer precision—a capability that is crucial for advanced nodes where even a single monolayer of thickness variation can compromise device performance. Applied Materials has developed ALD systems that offer superior uniformity, control, and scalability, supporting high-volume manufacturing across the industry.
Applied Materials’ PVD target lifetime control system, developed with Taiwan Semiconductor Manufacturing Co., extends PVD target service life by adjusting operation parameters based on target lifetime, ensuring consistent film quality and reducing production losses throughout semiconductor manufacturing cycles.
Etch Precision at the Atomic Scale: Dry Etch to ALE
Etch is the selective removal of material to create patterns and structures on the wafer, and the precision with which this removal is controlled determines the fidelity of every feature in a finished chip. Applied Materials has developed advanced etch systems offering high selectivity, anisotropy, and control over critical dimensions, alongside innovations in etch chemistry and chamber design that enable the realisation of smaller nodes and vertically stacked layers.
Dry Etching: RIE and ICP
Dry etching—particularly reactive ion etching (RIE) and inductively coupled plasma (ICP) etching—has been the workhorse of pattern definition in semiconductor devices. Applied Materials’ etch systems have enabled the realisation of smaller nodes by combining advanced etch chemistry with precision chamber engineering, supporting the move from planar transistors to FinFETs and gate-all-around architectures. Standards bodies such as NIST have recognised plasma etch uniformity as a critical metrology challenge at sub-10 nm nodes.
“The Draco Hard Mask increases etch selectivity by more than 30% for capacitor scaling, provides a 50% improvement in local critical dimension uniformity, and reduces bridge defects by 100X when co-optimised with the Sym3® Y etch system.”
Atomic Layer Etching (ALE)
Atomic Layer Etching is an emerging technique that offers precise control over the removal of material at the atomic layer level—a capability that is crucial for advanced nodes where even a single misplaced atom can result in a defective device. Applied Materials has been actively developing ALE technologies to support the continued scaling of semiconductor devices, positioning the company at the frontier of sub-nanometre process control.
Applied Materials’ Sym3® Y Etch System is co-optimised with the Draco Hard Mask using advanced RF pulsing to enable perfectly cylindrical, straight, and uniform hole patterning, with synchronised etching and byproduct removal for deep capacitor structures in high-density DRAM manufacturing.
Explore Applied Materials’ full patent landscape across etch and deposition technologies in PatSnap Eureka.
Search Patents in PatSnap Eureka →Materials Engineering: High-k, Metal Gates, and 3D Integration
Materials engineering is the foundation of semiconductor manufacturing—the discipline that determines which physical and chemical properties a device can achieve, and therefore which performance targets are reachable. Applied Materials has led across four critical materials domains: high-k dielectrics, metal gates, interconnect materials, and three-dimensional integration.
High-k Dielectrics and Metal Gates
High-k materials have been essential for reducing leakage current and improving gate control in transistors, enabling continued scaling of logic and memory devices beyond the limits of silicon dioxide. Applied Materials developed advanced materials and integration schemes to support this transition. Metal gates replaced polysilicon gates to reduce resistance and improve device performance, with Applied Materials providing metal gate integration solutions that support new gate stack technologies. Research published by Nature has documented how high-k/metal gate stacks became the industry standard at the 45 nm node and below.
A high-k dielectric is a gate insulator material with a dielectric constant (k) significantly higher than that of silicon dioxide. Higher k values allow thicker physical layers to achieve the same electrical capacitance, reducing quantum mechanical leakage current that becomes problematic at sub-45 nm gate lengths.
Interconnect Materials
Interconnect materials have been crucial for reducing resistance and capacitance as wire dimensions shrink. Applied Materials developed advanced interconnect materials and processes to support the scaling of on-chip wiring, addressing the RC delay bottleneck that increasingly limits chip speed at advanced nodes.
3D Integration: TSVs, Wafer Bonding, and Thinning
Three-dimensional integration—stacking multiple dies or wafers to increase density and functionality—has become a key strategy for continuing semiconductor scaling. Applied Materials developed 3D integration technologies including through-silicon vias (TSVs), wafer bonding, and wafer thinning. According to WIPO, patent filings related to 3D semiconductor integration have grown substantially over the past decade, reflecting the industry’s broad shift toward heterogeneous integration as a scaling pathway.
Applied Materials has developed 3D integration technologies including through-silicon vias (TSVs), wafer bonding, and wafer thinning, enabling higher density and functionality as the semiconductor industry pursues heterogeneous integration as a scaling pathway beyond traditional planar transistor shrinks.
Flagship Products: Quantified Performance Gains in Deposition and Etch
Applied Materials’ product portfolio translates materials science advances into measurable manufacturing outcomes. The table below summarises the five key products and processes documented in the roadmap, with their technical effectiveness and target application scenarios.
| Product / Process | Technical Effectiveness | Applicable Scenarios |
|---|---|---|
| Draco™ Hard Mask | >30% etch selectivity gain; 50% improvement in local CD uniformity; 100X bridge defect reduction (co-optimised with Sym3® Y) | DRAM memory array fabrication requiring deep capacitor hole etching with high precision for advanced memory scaling |
| Sym3® Y Etch System | Advanced RF pulsing for perfectly cylindrical, straight, uniform hole patterning; synchronised etching with byproduct removal | High-density DRAM manufacturing requiring precise vertical capacitor etching with minimal defects and optimal pattern fidelity |
| PROVision® eBeam Metrology | Nearly half a million measurements per hour for hard mask CD uniformity monitoring; massive immediate actionable data | Real-time process monitoring and quality control requiring high-throughput dimensional metrology and defect inspection |
| PECVD Shallow Trench Isolation (Micron Technology) | Dynamically adjusts deposition-to-etch ratio using silane, oxygen, and inert gas mixture; ensures void-free filling | Shallow trench isolation region formation requiring void-free filling and reliable electrical isolation between device components |
| PVD Target Lifetime Control System (TSMC) | Extends PVD target service life by adjusting operation parameters based on target lifetime; ensures consistent film quality | PVD processes requiring optimised target utilisation and consistent thin film quality throughout production cycles |
The co-optimisation of the Draco Hard Mask with the Sym3® Y Etch System is not an incremental improvement—it represents a system-level approach to DRAM capacitor scaling that simultaneously addresses selectivity (>30% gain), uniformity (50% improvement in local CD uniformity), and defect density (100X bridge defect reduction) within a single integrated process flow.
Analyse the competitive patent landscape around DRAM etch and metrology technologies with PatSnap Eureka.
Explore Patent Data in PatSnap Eureka →Process Integration and Advanced Process Control
Process integration combines deposition, etch, and materials engineering steps into a cohesive manufacturing flow, optimising yield, performance, and cost—and it is where the cumulative value of individual technology advances is realised or lost. Applied Materials has been a leader in process integration, providing comprehensive solutions that address the complex challenges of advanced semiconductor manufacturing.
Deposition–Etch Sequencing
Deposition and etch steps are often interleaved in a sequence to create complex three-dimensional structures. Applied Materials has developed deposition/etch sequences specifically applied in semiconductor device fabrication, reflecting the understanding that neither step can be optimised in isolation—the output of each deposition step defines the starting condition for the subsequent etch, and vice versa.
In-Situ Monitoring and Advanced Process Control
In-situ monitoring and control are essential for ensuring process stability, reducing variability, and improving yield. Applied Materials’ control systems allow for precise control of process parameters to achieve the desired critical dimension and uniformity of the etch rate over the entire wafer. Advanced Process Control (APC) systems use data-driven models and algorithms to optimise process performance and reduce variability. The SEMI standards organisation has published specifications for APC interfaces that underpin industry-wide adoption of these closed-loop control approaches.
Future Outlook: Scaling, Sustainability, and Emerging Application Demand
The semiconductor industry will continue to face challenges and opportunities as it pursues further scaling and innovation, and Applied Materials is positioned to address these through continued research and development, collaboration, and customer partnership. Three forces will shape the trajectory through 2030 and beyond: continued device scaling, the emergence of new application categories, and growing sustainability requirements.
Continued Scaling
The industry will continue to pursue scaling, exploring new materials, structures, and integration schemes. The International Technology Roadmap for Semiconductors (ITRS), now succeeded by the MAPT Roadmap, has been the guiding framework for this effort—projecting technology needs and driving research and development across the ecosystem. Applied Materials has collaborated with chipmakers, academia, and research institutions to advance materials engineering and process technologies in alignment with these roadmap targets.
Emerging Applications Driving Demand
The 2030 Decadal Plan for Semiconductors identifies five categories of emerging applications that will drive demand for advanced semiconductor devices: smart sensing, memory and storage, communication, security, and energy efficient computing. Each of these application areas places distinct requirements on deposition, etch, and materials engineering—from the ultra-low-power demands of smart sensing to the high-bandwidth memory requirements of AI computing workloads.
The 2030 Decadal Plan for Semiconductors identifies smart sensing, memory and storage, communication, security, and energy efficient computing as the five emerging application categories that will drive demand for advanced semiconductor devices through the next decade.
Sustainability
Sustainability will become an increasingly important consideration in semiconductor manufacturing, with a focus on reducing energy consumption, water usage, and waste generation. This aligns with broader industry commitments tracked by organisations such as WIPO and reflected in green technology patent filing trends, where semiconductor process efficiency has emerged as a significant sub-category.
“Emerging applications including smart sensing, memory and storage, communication, security, and energy efficient computing will drive demand for advanced semiconductor devices through 2030 and beyond.”