RF power helps control the plasma used to etch and deposit materials in advanced chipmaking. Faster, more responsive generators and matching networks can make plasma conditions more repeatable during short pulses—but they are one part of a larger process stack, not a standalone fix for atomic-scale patterning challenges.
What RF power controls in advanced chipmaking
In dry etch and plasma-assisted deposition, radio-frequency (RF) power sustains and modulates the plasma inside a process chamber. During reactive-ion etching, ions and reactive species remove selected films; atomic-layer etch (ALE) can remove only a few atomic layers per cycle. The generator and matching network help the tool deliver power under changing plasma conditions.
At very small dimensions, small process variations can affect line edges, spacing, defects, or feature profiles. Lam Research describes modern etch as needing to form structures only a few angstroms in size while maintaining high aspect ratios and repeatability. “Angstrom era” is best understood here as a description of increasingly atomic-scale process tolerances, not as a guarantee that every chip feature measures a particular number of angstroms.
Why angstrom-era processes demand tighter control
Patterning leaves little room for process variation
In February 2024, Applied Materials identified line-edge roughness, tip-to-tip spacing limits, bridge defects, and edge-placement errors as challenges for 2 nm-and-below patterning. Its Sym3 Y Magnum combines deposition and etch in one chamber to smooth rough EUV line edges before etching. This is an example of process integration addressing pattern quality alongside plasma control.
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More complex transistor structures add process steps
In April 2026, Applied Materials said gate-all-around (GAA) transistor flows can require more than 500 process steps and tolerances approaching the size of individual atoms. Its new deposition systems target the metals and dielectrics used in advanced GAA transistors. The figure describes complex GAA flows as reported by Applied Materials; it is not a count for every chip or manufacturing process.
RF precision therefore operates within a broader stack that includes plasma generation and bias control, selective or atomic-layer etching, conformal deposition, lithography and pattern shaping, and metrology. RF control by itself cannot correct overlay, line-edge roughness, or contamination problems.
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Which RF innovations matter
Programmable pulsing and fast response
A pulsed RF profile changes power over time rather than applying one steady condition throughout a process. The ability to configure multiple pulse levels, and to change between states quickly and repeatably, gives process engineers more ways to tune plasma behavior. Advanced Energy’s July 12, 2023 launch statement for its eVerest system reports RF output response under 200 microseconds and pulse-state rise and fall times down to under 2 microseconds. These are the manufacturer’s published specifications, not independent comparative test results.
Frequency tuning, reflected power, and arc handling
Plasma conditions and chamber impedance can change during a process. Model-based frequency tuning and a matching network synchronized to pulse states are intended to help the power system adapt and limit reflected power during brief RF-on periods. Advanced Energy says its NavX matching network is designed to synchronize with rapid pulse states and reduce reflected power during short on-times, with the aim of widening the stable process window.
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Arc management is another relevant generator capability: a system needs to detect and manage electrical events that can disrupt a process. Advanced Energy lists arc management among eVerest’s features. Its product materials also list configurable multi-level pulse profiles, model-based frequency tuning, controlled overshoot, and PowerInsight data collection.
Separate control of ion energy and chemistry
Etch results depend on both ion energy and the chemistry of reactive species. Systems that allow these effects to be tuned or controlled separately can give engineers additional process-development options. Whether that capability produces better critical dimensions, selectivity, or repeatability depends on the specific chamber, materials, recipe, and measurement method; a generator specification alone does not establish those outcomes.
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What named systems and demonstrations show
The examples below illustrate different parts of the manufacturing challenge. They are not a head-to-head ranking: the equipment and demonstrations have different roles, and the cited manufacturers do not publish a common comparison of yield, throughput, or cost.
| System or work | What is documented | How to interpret it |
|---|---|---|
| Advanced Energy eVerest RF generator | Advanced Energy’s product page lists 1, 2, 13, 27, 40, and 60 MHz frequencies and 2, 3, 3.5, 6, and 10 kW power levels. It lists use in etch, PECVD, PVD, chamber clean, HDP-CVD, PEALD, and ALE. The company’s July 12, 2023 launch statement reports 3–10 kW output, 1–60 MHz operation, pulsing up to 100 kHz, output response under 200 microseconds, and pulse rise and fall times down to under 2 microseconds. | These are vendor-published capabilities. The product page’s listed frequency and power configurations and the launch statement’s operating ranges are not a guarantee that every combination is available in every system configuration. Advanced Energy describes the platform as enabling development of deposition and etch profiles below 2 nm. |
| Advanced Energy NavX matching network | Advanced Energy describes NavX as synchronized to rapid pulse states and designed to reduce reflected power during short RF-on periods. | This describes the intended matching-network function; no independent, cross-vendor measurement of process-window improvement is provided here. |
| Lam Research Akara DirectDrive | Lam’s 2025 release says DirectDrive provides plasma responses 100 times faster and targets angstrom-level precision for increasingly high-aspect-ratio structures. | The 100-times figure is Lam’s claim. The cited release does not supply an independent head-to-head benchmark or a comparison baseline in the available information. |
| Applied Materials Sym3 Y Magnum | Applied Materials said in February 2024 that the system combines deposition and etch in one chamber to smooth rough EUV line edges before etching. | This illustrates integrated pattern-shaping equipment, not an RF-generator specification or a directly comparable alternative to eVerest or Akara. |
| imec lithography and metal-etch demonstrations | An imec article published in 2025 reported a 2024 demonstration of 16 nm-pitch line-space images with a 0.55 NA High-NA EUV scanner. It also reported 2025 demonstrations of 20 nm-pitch metallized structures and 18 nm- and 20 nm-pitch ruthenium lines using direct metal etch. | These demonstrations show progress in lithography, materials selectivity, and etch. They do not by themselves establish commercial manufacturing yield or throughput. |
How to evaluate an RF system for a process
For a fab or process-development team, the useful question is not simply which generator has the largest frequency or power range. The system has to work with the chamber and recipe, and its claimed control needs to translate into measured process results.
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- Frequency and matching: Evaluate tuning accuracy and match speed, including behavior during short pulse on-times.
- Plasma stability: Examine ignition reliability, reflected-power management, and arc handling in the target process.
- Process control: Determine whether the system supports the needed control of ion energy and reactive-species chemistry.
- Wafer results: Compare critical-dimension uniformity, selectivity, aspect-ratio capability, and wafer-to-wafer repeatability using measurements from the relevant chamber and recipe.
- Factory fit: Assess sensor integration, model-based control, fab data connectivity, throughput, uptime, chamber compatibility, service requirements, and total cost of ownership.
There is no cross-vendor yield, throughput, or cost comparison established by the cited material. Vendor response-time and speed claims should therefore be treated as specifications or claims to validate for the intended process, not as proof of a superior production outcome.
Why RF precision must advance with lithography and metrology
Imec’s reported 16 nm-pitch High-NA EUV imaging result and its later metallized-structure and ruthenium-line demonstrations show that increasingly fine patterning depends on several capabilities advancing together. Lithography defines the pattern, materials and etch determine how that pattern transfers into structures, and metrology verifies what was produced. Better RF control can support the plasma portion of that chain, but it cannot substitute for the other steps.
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