Varian
HS 16 Diffusion
Provisional entry — research in progress
This page was generated automatically from cited public sources and hasn't completed the full research pass yet. Every specification shown carries its source; more detail is added as research completes.
The Varian HS 16 Diffusion is a diffusion pump. The Varian HS 16 Diffusion is a high-throughput pump used where throughput for heavy gas loads is important. The Varian HS 16 Diffusion is water-cooled and uses a heater at the bottom of the pump body.[1]
What it is
General reference — not yet source-verifiedDiffusion pumps are high-vacuum pumps used to create low-pressure conditions for vacuum process equipment. Diffusion pumps generally serve as the high-vacuum stage in a pumped system and operate together with a backing pump. Diffusion pumps are used where large gas loads or large chamber volumes must be evacuated into the high-vacuum range.
Where it fits in the process flow
General reference — not yet source-verifiedDiffusion pumps sit in the vacuum infrastructure of a process tool rather than performing the wafer process directly. Diffusion pumps are commonly connected below a process chamber through a valve train and backed by a mechanical pump. Diffusion pumps are typically used after rough pumping and before steady-state vacuum processing in chambers that need sustained high vacuum.
Applications
General reference — not yet source-verifiedDiffusion pumps are used in vacuum process systems for deposition, coating, evaporation, beamline, and furnace environments where clean high vacuum is needed at substantial chamber scale. Diffusion pumps are suited to applications in which pumping speed and throughput matter more than dry compression at the high-vacuum stage.
Why won't it start?
Documented failure modes, common issues, and field considerations.
- Extended operation in the overload condition may result in breakdown of the top jet and fluid loss through the foreline.
What do the numbers mean?
Power & electrical7
- 8100 Watts[2]
Vacuum & pumping12
Dimensions & facilities4
Configuration & options10
Vintage & configurations
Documented models & variants
| Designation | Generation | Vintage | Changes | Source |
|---|---|---|---|---|
| HS-16, 8.1 kW | — | — | Listed as an HS-16 power variant with 8.1 kW electrical power, 10,000 l/s air pumping speed, 12,500 l/s helium pumping speed, and 3 qt fluid charge. | idealvac.com[1] |
| HS-16, 9.6 kW | — | — | Listed as an HS-16 power variant with 9.6 kW electrical power, 12,500 l/s air pumping speed, 17,500 l/s helium pumping speed, and 5 qt fluid charge. | idealvac.com[1] |
What does it need to run?
Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.
- Configuration8100 Watts[2]
- Voltage480 V[2]
- TypeDiffusion pump[4]
- Pumping speed, air6,000 L/s[4]
- Pumping speed, helium7,500 L/s[4]
- Foreline flange3" ASA[4]
- Electrical power8.1 kW[1]
- Electrical power9.6 kW[1]
- Input voltage480 V[2]
- Electrical requirements3-phase, 50/60 Hz, 240/415/480 V[5]
- Operating range7x10^-4 to <5x10^-8 Torr[1]
- Operating range9.1x10^-4 to <7x10^-8 mbar[1]
- TypeHigh throughput diffusion pump[1]
- Heater locationMounted at the bottom of the pump body[1]
- Operating pressure range7x10−4 Torr to <5x10−8 Torr[1]
- Maximum pumping speed, air10,000 l/s[1]
- Maximum pumping speed, helium12,500 l/s[1]
- Electrical power8.1 kW; 9.6 kW variant also listed[1]
- Recommended backing pump capacity80 cfm[1]
Where are the manuals?
Generated from public-source data on file. Enter your email to access — nothing is published; details are routed privately.
Not publicly documented
Field notes
No research found yet — worked with this tool? Share what you know.
Frequently asked questions
What does a thermal diffusion system do?General reference — not yet source-verified
A thermal diffusion system heats substrates in a controlled atmosphere so that dopants can move into the material, surface oxides can grow, and deposited or implanted layers can be thermally modified. The process relies on temperature, gas chemistry, and time rather than direct physical patterning.
How is a diffusion furnace different from a rapid thermal tool?General reference — not yet source-verified
Machines of the diffusion-furnace class are designed for longer, highly stable thermal exposures and are commonly used for batch processing. Rapid thermal tools, by contrast, emphasize short high-temperature cycles on individual substrates or small loads.
Why are controlled gases important in diffusion equipment?General reference — not yet source-verified
The process atmosphere determines whether the substrate is simply heated, oxidized, exposed to dopant species, or protected from unwanted reaction. Gas composition and cleanliness are central because thermal steps can strongly affect both electrical behavior and surface condition.
Not publicly documented
The following facts about the HS 16 Diffusion are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the HS 16 Diffusion are on record.
Answerable by: OEM historical records or a trade-press announcement
The control-system platform and OS era of the HS 16 Diffusion are not on record.
Answerable by: an engineer who operated it or OEM installation records
The process node or technology generation of the HS 16 Diffusion is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the HS 16 Diffusion are on record.
Answerable by: an OEM parts catalog or a service engineer
No publicly hosted manuals, SOPs, or datasheets for the HS 16 Diffusion are on record.
Answerable by: university cleanroom staff or an OEM application specialist
Sources & citations
Sources (5)Every fact above is drawn from these public sources
- [1]idealvac.com — idealvac.comidealvac.com
- [2]Inventory photo
- [3]waferpedia.comwaferpedia.com
- [4]lesker.comlesker.com
- [5]provac.comprovac.com
Last updated Oct 19, 2026.
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