What is New in ALD? Q1-2026

Atomic Layer Deposition (ALD) is currently entering what industry experts are calling a "supercycle," driven by the shift to 2nm logic nodes and the explosion of AI-related hardware.

Here is the breakdown of the most significant breakthroughs and news in ALD as of early 2026:

1. The "Molybdenum Revolution" in Semiconductors

In February 2026, Applied Materials unveiled its Spectral™ ALD system, which is set to change how chips are wired.

Selective Deposition: For the first time, molybdenum is being selectively deposited to replace tungsten for transistor contacts.

The Benefit: Molybdenum maintains better conductivity at sub-2nm scales. This reduces contact resistance by up to 15%, a critical hurdle for the next generation of AI chips.

2. Ferroelectric TiO2: A Computing Breakthrough

Researchers at UC Berkeley (May 2026) discovered they could transform common titanium dioxide (TiO2) into a ferroelectric material simply by using ALD to make it thinner than 3 nanometers.

Why it matters: Previously, TiO2 was just a standard insulator. At this atomic scale, it can now "switch" states, potentially leading to ultra-dense, low-power memory and logic devices that are compatible with existing chip-making tools.

3. AI-Assisted Process Optimization

ALD is quite slow, but AI is fixing that. New "Digital Twin" models and real-time monitoring are being integrated into 2026 reactor designs.

Predictive Maintenance: AI models can now predict precursor depletion and film thickness deviations before they happen, drastically reducing "test wafer" waste.

Rapid Recipe Discovery: AI-driven ALD is cutting the time to develop new material recipes (like for AlScN or GaN) from months down to weeks.

4. Area-Selective ALD (AS-ALD) Goes Commercial

We are seeing the move from "blanket" deposition to "bottom-up" construction.

No More Etching: Instead of coating an entire wafer and then etching away what you don't need, AS-ALD uses chemical inhibitors to ensure atoms only stick to specific spots.

Alignment: This solves the "edge placement error" problem in 3D structures, which is the biggest headache in manufacturing GAA (Gate-All-Around) transistors. link

5. Energy Storage: "Atomic Armor" for Batteries

Companies like Forge Nano are scaling ALD for the EV market.

High Throughput: New spatial ALD systems can now coat over 1,600 liters of battery powder per day.

Performance: These atomic-scale coatings prevent the "electrolyte-electrode" reactions that cause batteries to degrade, significantly extending the life of high-capacity lithium cells. link

Looking Ahead

The AVS 26th International Conference on ALD (June 2026, Tampa, Florida) is expected to focus heavily on Atomic Layer Annealing and new precursors for sustainable, "green" chemistry that minimizes hazardous byproducts. link