UHV Foil Ultra-high-vacuum compatible metal foils for chambers, fixtures, shielding & precision applications Includes UHV-cleanliness concepts, alloy/grade direction, thickness/temper notes, handling/cleaning guidance, and fit-for-use selection prompts. ▼ EXPAND TECHNICAL REFERENCE (click here to open)
Category Overview
Ultra-High-Vacuum Foils for Critical Hardware
Thin metal foils selected for low outgassing and controlled contamination in vacuum and precision environments.
UHV foils are thin metal materials used in ultra-high-vacuum (UHV) and high-vacuum systems where surface cleanliness, low outgassing, and stable material behavior matter. Typical uses include shields, liners, witness foils, thermal/radiation barriers, masking, spacers, and custom chamber hardware in semiconductor process tools, analytical instruments, and R&D vacuum setups.
Best suited for: vacuum chambers, deposition/etch systems, analytical instruments, beamline/optics support hardware, and precision fixtures where contamination control is critical. Rule of thumb: in vacuum, the surface is the product—choose foils by material compatibility, cleanliness requirements, and thermal/mechanical behavior at your operating conditions.
UHV-Compatible Low Outgassing Vacuum Hardware Shielding Fixtures
Why foil selection affects vacuum performance
In UHV and high-vacuum systems, contamination control is driven by surface condition, adsorbed films, and outgassing. Thin foils can introduce hydrocarbons, moisture, or processing residues if handled improperly. Matching foil material, cleaning method, and handling protocol to your chamber process reduces risk of elevated base pressure, unexpected deposition contamination, or unstable process results.
- Material compatibility: ensure the foil is compatible with your gases, plasma chemistry, temperature, and radiation environment
- Cleanliness: oils, fingerprints, and packaging residues can outgas and redeposit
- Thermal behavior: expansion, warping, and embrittlement depend on alloy, temper, and thickness
- Thickness/rigidity: affects forming, fitment, and stability under vacuum and thermal cycling
Common mistakes to avoid
- Handling foil with bare hands (finger oils become outgassing sources)
- Using general-purpose cleaners that leave residues or surfactants
- Assuming “metal foil” is automatically UHV-clean (manufacturing oils and films vary)
- Choosing thickness by “feel” instead of thermal/mechanical requirements
Material & Grade Direction
Start with process compatibility
UHV foil material selection depends on your tool and process conditions. Common vacuum-hardware foils include stainless steels and select non-ferrous foils, chosen for temperature tolerance, corrosion resistance, magnetic behavior, and compatibility with process chemistries.
- Stainless foils: often used for shields, liners, and formed parts; consider magnetism requirements and temperature exposure.
- High-purity foils: used where deposition contamination risk is extremely sensitive; confirm alloying content and surface condition.
- Specialty foils: selected for unique optical/thermal/radiation needs in specific tools and fixtures.
Best practice: match the foil to your chamber material set and your gas/plasma environment, then align cleaning and bake procedures to your facility standards.
Handling, cleaning & preparation (facility-safe approach)
UHV foil handling is contamination control. Follow your facility’s approved procedures and change-control requirements for any cleaning or bake processes.
- Gloves + tools: handle with clean gloves and dedicated tweezers/tongs to avoid fingerprints and edge damage.
- Clean packaging discipline: keep foil sealed until use; avoid shop dust and mixed-material contact.
- Residue awareness: manufacturing oils and protective films may be present; remove only using your approved process.
- Particle control: cut/trim operations can create burrs and particles—control and clean per SOP.
- Bake/conditioning: if your process requires bake-out, align temperature/time to the foil material and facility policy.
Cleanroom note
If the foil is used in a cleanroom workflow, ensure cutting/handling is performed in an appropriate area with controls for metallic particulates and edge debris.
Shop By
Fast selection shortcuts
- Material / alloy: match to your tool hardware set and process chemistry
- Thickness: balances formability vs rigidity and thermal stability
- Temper / hardness: impacts spring-back, forming, and tear resistance
- Format: sheets vs rolls; pre-cut vs custom-cut use cases
- Cleanliness expectation: confirm as-received condition and your prep process
Selection priority: process compatibility → thickness/temper → format → handling/cleanliness workflow.
Chamber shields & liners
→ Choose material compatible with chemistry + thickness for stiffness and thermal cycling
Formed spacers & wraps
→ Balance formability (thinner/softer) vs durability (thicker/harder)
Contamination-sensitive tools
→ Prioritize surface condition, handling, and validated preparation steps
Quick Match: UHV foil selection prompts
| Application | Recommended direction | Why it fits | Key check |
|---|---|---|---|
| Thermal/radiation shielding | Material matched to temperature + environment | Maintains integrity under thermal cycling | Max temperature and embrittlement risk |
| Chamber liners / wraps | Thickness for stiffness + controlled handling | Reduces warping and particle generation | Formability vs rigidity |
| Witness foil / contamination tracking | Stable, clean surface with controlled prep | Supports consistent surface exposure and analysis | Surface condition + prep repeatability |
| Custom cut parts | Choose thickness/temper for cutting method | Reduces burrs and metallic debris | Burr control + edge cleanliness |
For the fastest recommendation, be ready to share: tool/process environment (gases/chemistry), temperature exposure, required foil thickness/format, and whether the foil will be cut/formed on-site (particle control needs).
Need help selecting?
Talk to a vacuum hardware specialist
Email Sales@SOSsupply.com or call (214) 340-8574 for UHV foil selection guidance and application fit checks.
SOSCleanroom Disclaimer
This selection guidance is provided for general informational purposes to support UHV foil purchasing decisions and SOP discussions. Material compatibility, outgassing performance, and cleanliness depend on your process chemistry, temperature, handling method, and preparation steps. Customers are responsible for verifying suitability, safe handling, and compliance with internal procedures and change-control requirements (including any cleaning or bake processes). Specifications may change without notice; always refer to current manufacturer documentation and your approved facility standards.