iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
ASML chipmaking scanners project a circuit pattern from a reticle onto a wafer coated with photoresist. The wafer is developed, etched or otherwise processed, coated again, and exposed repeatedly. EUV scanners use 13.5 nm light for the smallest, most demanding layers; DUV scanners use 193 nm, 248 nm, or 365 nm light for most other layers.
Both technologies are needed because a modern chip is not printed in one exposure. Manufacturers choose the least complex scanner that can meet each layer’s resolution, alignment, and cost requirements. EUV provides the shortest wavelength, while DUV remains the workhorse for the majority of layers.
What an ASML lithography machine actually does
A lithography scanner is a precision projection system, not a device that carves a finished circuit directly into silicon. A reticle, also called a mask, carries the pattern for one chip layer. The scanner illuminates that reticle, reduces its image through an optical system, and focuses the reduced pattern onto photoresist on a silicon wafer.
After exposure, the wafer goes through chemical development so selected parts of the resist remain or are removed. Etching, deposition, implantation, cleaning, and inspection then transfer or modify the pattern in the underlying materials. The wafer is coated with fresh resist and exposed again for the next layer. A finished processor or memory device therefore results from many tightly aligned lithography cycles.
#1 Best Overall
- Powerful Turbo Fan:CAGIWIRU Electric Air Duster have reached speed up to 130000RPM,Can efficient remove dust and debris.With LED light and Three Adjustable Speed to meet with different cleaning tasks.
- With Attached USB C Fasting Charging cable.Charing 3 hours,Enjoy up to 240 minutes of use on the lowest setting, For third speed can use for 25mins.with four charging options to meet with your needs.
- Wide Application: attached 5 different nozzles,making it suitable for a variety of scenes, such as car,pet, pc, keyboards, and other electronic devices. It also serves for office and home clean duster.
- Handy Design & Portable:Cordless air duster electric nozzle is Light weight and small size, design and comfortable to hold and space saving, convenient to carry around. You can put it in your room or inside the car without taking up space.
- Economical &Reusable: Built durable materials with a long-lasting battery,our CAGIWIRU air duster it's a sustainable alternative to disposable air cans.
ASML describes the process as projecting a blueprint onto the wafer. Different feature sizes require different lithography systems, which is why a fab operates several scanner types rather than relying on a single machine.
How one exposure moves from reticle to wafer
- Prepare the wafer. A silicon wafer receives a thin photoresist coating. The resist is sensitive to the scanner’s wavelength and is engineered for the process layer being printed.
- Load the reticle. The reticle contains the geometric pattern for that layer. It is positioned and held with the accuracy required for repeating the pattern across many wafer fields.
- Generate and shape the light. DUV tools use excimer-laser sources or mercury sources. EUV tools generate 13.5 nm radiation and condition it into a usable exposure beam.
- Illuminate the pattern. The optical system directs light onto the reticle. The reticle is larger than the image printed on the wafer, so the projection optics reduce the pattern.
- Project and focus. The scanner forms a reduced image on the resist. Wavelength and numerical aperture (NA) determine how finely the system can resolve neighboring features.
- Align the layer. The wafer stage positions each field and aligns it to patterns already present on the wafer. This layer-to-layer registration is called overlay.
- Expose the fields. A step-and-scan motion exposes one field, moves the wafer, and repeats until the usable wafer area is covered.
- Develop and process. Development reveals the intended resist image. Etch or other process steps transfer that image, after which the surface is cleaned and prepared for the next cycle.
The scanner performs the exposure and alignment part of this chain. It does not replace the deposition, etch, metrology, cleaning, or inspection equipment surrounding it in a semiconductor fab.
What makes EUV different
13.5 nm light
EUV uses a 13.5 nm wavelength, close to the X-ray region. That wavelength is far shorter than the 193 nm light used by advanced ArF DUV systems, so it can resolve much smaller features under comparable optical conditions. ASML’s product description characterizes 13.5 nm as almost X-ray range.
Vacuum instead of air
Air absorbs EUV strongly, and ordinary glass or other conventional lens materials cannot transmit it. The source, reticle, projection path, and wafer exposure region therefore operate in high vacuum. Removing air is not an optional cleanliness measure; it is necessary for the light to reach the wafer.
Mirrors instead of lenses
Because transmissive lenses do not work at 13.5 nm, EUV scanners use all-reflective optics. Specialized multilayer mirror coatings reflect the wavelength, and a sequence of mirrors guides, reduces, and focuses the reticle image. Every reflection introduces demanding requirements for surface quality, coating uniformity, contamination control, and alignment.
Rank #2
- Screen Cleaner is Your Screen’s New Bestfriend! - EVEO is proud to present a screen cleaner that’s perfectly suited for your TV. Meet your new screen cleaner, computer screen cleaner, laptop cleaner, iPad cleaner, Macbook,tv cleaner or any other electronic device. Our screen cleaner spray and wipe along with the included plush microfiber cloth, easily removes dust, fingerprints & other smudges on the screen’s surface. Clean effectively for a streak-free screen
- Gentle on your Screens - Our screen cleaner spray and wipes is compatible to be used even for the most sensitive LCD, LED, CRT, and OLED screens in proper use. Be at ease knowing that this product is compatible with all the major brands: LG, SONY, Samsung, Sharp, iPad, iPhone, Android screens, Kindle, PC monitors - we’ve got you covered! Can be used as LCD screen cleaner, tv cleaner, smart tv screen cleaner, and more
- Premium Super Soft Plush Microfiber Cloth - Included in this efficient screen cleaning kit. This screen cleaner spray and wipe has our signature plush microfiber cloth specially designed to comply with screens and monitors and leave them streak-free. Has been shown to effectively absorbs stubborn stains, zero streaks, and no fiber shedding. Always use this together with our screen cleaner for the best results
- Easy-to-Use Screen Cleaner Kit + microfiber cleaning cloth - The EVEO Screen Cleaning Kit will easily be your new favorite tool when it comes to taking care of the things you love most, quick and easy solution for a streak-free screen. Simply screw on the sprayer gun on the screen cleaner bottle. Spray the cleaning liquid onto the microfiber cloth, then wipe the screen until desired cleanliness & shine is achieved.
- Quality Screen Care Kit Worth Purchasing - Enjoy a convenient Screen Cleaner anytime, anywhere you need it. Your satisfaction is our top priority. We stand behind the quality of our products and that’s why, you shouldn’t be worrying at all. We manufacture the Best Screen Cleaner. and can be used for laptop cleaning kit, laptop screen cleaner, tv screen cleaner for smart tv. MacBook screen cleaner, monitor cleaner or screen cleaner spray for electronic devices with microfiber cleaning cloth
A system-level engineering challenge
EUV performance depends on more than source brightness. The machine must maintain source power, vacuum quality, mirror cleanliness, reticle handling, wafer-stage motion, focus, and overlay at the same time. Small contamination or position errors can reduce usable exposure or degrade the printed pattern. This is why an EUV scanner is an integrated source, optics, stage, control, and environmental system rather than simply a shorter-wavelength lamp.
How DUV scanners print larger and less demanding features
Three DUV wavelengths
ASML identifies three principal DUV families:
- ArF: 193 nm, the shortest-wavelength DUV option and the basis of the highest-resolution DUV patterning.
- KrF: 248 nm, used for layers whose dimensions and process requirements fit that wavelength.
- i-line: 365 nm, a mercury-source wavelength used for still larger features and mature process layers.
DUV projection systems use refractive lenses. Unlike EUV, their exposure path can operate in air or a controlled atmosphere because these wavelengths pass through suitable optical materials.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Why immersion DUV uses water
ArF immersion scanners place a thin water layer between the final projection lens and the wafer. Water raises the effective numerical aperture, allowing the system to resolve finer features than a comparable dry optical path. The liquid must be managed as part of the scan: it has to remain uniform, clean, and correctly positioned while the wafer moves.
Immersion improves optical capability, but it does not turn a DUV tool into an EUV tool. The wavelength remains 193 nm, and the process still relies on refractive lenses and the resist, focus, and overlay limits associated with that system.
Representative resolution by wavelength
ASML’s 2025 annual-report graphic gives representative system resolutions. These figures describe representative capabilities, not a guarantee that every process layer will print at exactly that dimension. Actual results depend on the process, resist, pitch, pattern complexity, focus budget, and required overlay.
Rank #3
- 【Large size】：Measuring 800 x 300 mm/ 31. 5×12 inches, which is wider and taller than others. Large mouse pad can perfectly fit your keyboard and mouse of any size, and there is also ample space for peripherals such as phones, tablets, etc.
- 【LED backlight mouse pad】：Blade Hawks RGB mouse pad provides 7 static modes and 7 dynamic modes will give you the options you are looking for. Power-off memory function remembers the last lighting mode you selected. The super glow fiber Chroma will give you a colorful gaming setup that you want.
- 【Anti-slip rubber base】：Made from Natural rubber, this gaming mousepad will firmly grip your desktop, allowing you to enjoy the ultimate precision in the games you are most passionate about. It also comes with a texture that enhances this ability even further.
- 【Smooth and waterproof surface】: Micro-textured cloth surface, for extremely precise mouse control and a smooth movement. When liquid splashes on the gaming mouse pad, it forms water droplets and slides down. Will not delay your work or gameplay.
- 【Plug and play】: This mouse and keyboard pad is powered by USB, plug and play, no driver required. One button control light modes. Press one time to change the lighting mode, press twice to change the brightness, press and hold about 3 seconds turn ON/OFF.
| System family | Wavelength | Optical approach | Representative resolution | Typical role |
|---|---|---|---|---|
| EUV | 13.5 nm | Reflective mirrors in high vacuum | 8 nm | Smallest and most complex critical layers |
| ArF DUV | 193 nm | Refractive projection optics; immersion variants add water | 38 nm | High-resolution layers that can be patterned with DUV |
| KrF DUV | 248 nm | Refractive projection optics | 80 nm | Less demanding feature sizes |
| i-line DUV | 365 nm | Refractive optics using a mercury-source line | 220 nm | Larger features and mature layers |
Why an advanced chip uses EUV and DUV together
An advanced process node does not mean every layer is exposed with EUV. A chip may contain only one or two especially complicated layers that need EUV; the rest can be printed with DUV according to ASML. Contacts, interconnects, memory structures, alignment marks, and other layers have different pitches and tolerances. Using EUV on a layer that DUV can print would add complexity without necessarily improving the device.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →When EUV is selected
- The layer contains the smallest pitches or most crowded two-dimensional patterns.
- Printing it with DUV would require additional patterning steps that increase process complexity.
- The design’s overlay and defect requirements justify EUV’s capability.
When DUV is the better choice
- The layer’s dimensions fit ArF, KrF, or i-line capability.
- A mature DUV process offers adequate focus and overlay margin.
- The fab can obtain the required throughput and cost with an established DUV flow.
This division is an economic and technical decision. EUV reduces the need for some multi-patterning approaches on the tightest layers, while DUV supplies a broad range of capable, productive exposures for the rest of the wafer.
Throughput, overlay, and the economics of a layer
Throughput is usually expressed in wafers per hour, but the number must be tied to a particular scanner, recipe, and operating condition. ASML reported that the NXE:3800E reached its full specification of 220 wafers per hour in 2025. That is a reported specification for that EUV model, not a universal rate for every EUV or DUV machine.
Layer economics include more than scanner speed. A manufacturer weighs exposure time, resist and mask costs, process steps, metrology, defect risk, and the number of patterning cycles needed to reach the target pitch. DUV can be the lower-cost option for a layer even when EUV is technically capable of printing it. Conversely, EUV may be economically preferable for a critical layer if it eliminates several DUV patterning steps.
Overlay is another economic variable because every layer must line up with structures printed earlier. A scanner that exposes quickly but cannot hold the required alignment would not produce usable chips. Focus control, stage stability, reticle handling, and contamination management therefore affect the number of good dies, not just the headline wafer-per-hour figure.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsRank #4
- 【Softer and More Comfortable】Vaydeer wrist rest has unique diamond pattern, which is the combination of softness and aesthetics. The materials of wrist rest are improved into higher quality memory foam and covered with silky smooth lycra. The computer wrist rest makes you as comfortable and cushiony as like rest your wrists on clouds.
- 【Ergonomic Wrist Saver】The wrist rests for keyboard and mouse comes with a 17.32×3.15×0.83 inch keyboard wrist pad and a 5.94×3.15×0.83 inch mouse wrist support. Based on ergonomic design, the unique concave shape is the perfect fit for your wrist joints. The wrist rest pad fits most computer keyboards and laptops, improve hand and wrist posture, release your wrist and arm stress.
- 【Non-Slip Rubber Bottom】Featuring an anti-skid silicone base on the bottom, this wrist keyboard support stays firmly in place on your desk, preventing the padding from sliding around, ensuring stable and consistent wrist support during extended computer sessions.
- 【Better Experience & Pain Relief】Our keyboard arm rest is beneficial to alleviate the soreness caused by direct contact and friction between your arm and a hard desk surface, reducing the risk of wrist fatigue or carpal tunnel. The soft texture of memory foam can evenly distribute the pressure around your wrists and provide good support with just enough give.
- 【Helpful in Multiple Scenarios】Whether you're working, studying, writing, typing, gaming, this keyboard and mouse rest combo is an essential accessory to add comfort and support to your hands and wrists. It’s also a great gift for men, women, family, friend, coworker, gamer, teacher, etc.
What happens inside an EUV exposure field
The scanner first establishes a stable vacuum and thermal environment. The source produces EUV radiation, reflective optics collect and shape it, and the reticle presents the layer pattern. Mirrors then reduce and focus that reflected image onto the resist-coated wafer. The wafer stage moves through the scan while sensors and control systems maintain position and focus.
Because the reticle and wafer are not simply placed under a stationary lamp, the machine must coordinate source timing, mirror alignment, reticle motion, wafer motion, and focus in real time. The same exposure concept applies to DUV step-and-scan tools, but EUV’s vacuum and reflective path add additional control points.
High-NA EUV: the next capability increase
High numerical aperture EUV increases the optical acceptance angle so the system can print finer features. ASML and imec’s joint High-NA EUV laboratory uses the TWINSCAN EXE:5000 as an early development platform for logic and memory manufacturers. Their announcement described preparation for high-volume manufacturing in the 2025–2026 timeframe.
Higher NA does not provide a free resolution gain. As NA rises, depth of focus becomes tighter, leaving less tolerance for wafer height variation, resist thickness variation, focus error, and process drift. High-NA programs therefore require stronger focus control, tighter wafer and reticle handling, and process development that can exploit the optical capability without losing yield.
Windows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallCrashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteCommon misconceptions and practical limits
“EUV prints the whole chip in one pass.”
It does not. Each reticle represents a layer, and the scanner exposes many fields across a wafer. The wafer then returns for additional lithography and non-lithography steps.
Best Value
- 【No Drill Mounted】Cable management tray can be assembled in as little as 3 minutes or less-simply. Side clips easily clampe the edge of desk, pass through the holes on the sides, and secure excess cables with baskets. Desk cable management supports inward or outward installation to meet your needs in different scenarios, and provides you with great convenience when collecting and organizing wires.
- 【Rubber Pad Protects Desk】Wire organizer under desk built-in soft rubber pads on the clamp protect your desk from scratches, so you will not damage your furniture or office.
- 【Sturdy and Beautiful】Cord management under desk is made of high-quality carbon steel and holds about 15 lbs. The wire basket has 2 holes on each side of the tray to enable your cables to pass freely. Cable baskets are suitable for desk thickness use from 0.4" to 2.4".
- 【Space Saving & Keep Organized】Desk cable management tray holds all your power cords, outlet strips, USB hubs and computer transformers hidden from your feet, and the data cables will not enter the vacuum cleaner to keep your desk clean and tidy. Desk wire organizer is also suitable for use in the kitchen and outdoors.
- 【Reduce Safety Risks】Cable tray under desk keeps all plugs away from your kids, no more worry about tripping. Using 2 holes wire tray saves extra space, helps you easily cabling and wire protection. The mesh design is not easy to accumulate dust, but avoids safety accidents caused by messy wires.
“A shorter wavelength automatically gives the final feature size.”
Wavelength is fundamental, but resolution also depends on numerical aperture, focus, resist behavior, pattern geometry, and process control. The representative values in the table should not be read as a promise for every layer.
“DUV is obsolete once EUV enters a fab.”
DUV remains necessary for the majority of layers, including layers whose dimensions do not justify EUV. ArF immersion, dry ArF, KrF, and i-line tools occupy different points on the capability and cost curve.
“A consumer UV lamp can reproduce this process.”
It cannot. Semiconductor lithography requires a reticle projection system, wavelength-specific optics, wafer stages, resist and development chemistry, overlay control, metrology, and a tightly managed process line. EUV additionally requires high vacuum and reflective multilayer optics.
Recommended Free Tools
Putting the two technologies into one manufacturing flow
- Choose the layer’s patterning method. The process team assigns EUV, ArF immersion, another DUV option, or a combination based on pitch, overlay, process margin, and economics.
- Prepare the reticle and recipe. The selected scanner receives the correct reticle, focus settings, illumination conditions, and alignment data for that layer.
- Expose the wafer. The scanner steps and scans across all fields while maintaining the required focus and overlay.
- Transfer and inspect. Development and etch or related processing turn the resist image into a device layer. Inspection and metrology verify dimensions, defects, and alignment.
- Repeat with the next layer. The wafer may move between EUV and several DUV scanner families as the design moves from the smallest critical structures to larger, less demanding features.
The result is a deliberately mixed lithography flow: EUV is reserved for the layers that benefit most from its 13.5 nm wavelength, while DUV supplies the scale, flexibility, and economics needed to complete the rest of the chip.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
