Vacuum chamber component machining
Chamber bodies, gas-delivery parts and seal interfaces — where the leak path and the trapped volume decide the process.
Open chamber parts →SOLUTIONS · SEMICONDUCTOR & VACUUM
Semiconductor & Vacuum — The Defect That Stops You Is Not Dimensional
A burr that is cosmetic on an automotive bracket is a particle source inside a process chamber. A blind hole that never gets cleaned is an outgassing reservoir. That is the shift this industry forces: the acceptance criterion moves from the calliper to the surface and the cavity. Three things then drive the tool decision — what the part touches (process gas, plasma, wafer, coolant), what has to be removed before it can be used (burr, trapped chip, residue), and whether the surface will be plated, anodised or sealed. HENTRY reviews the drawing against those three, not against a diameter alone.
WHO THIS IS FOR
Shops building parts that live inside a tool or a chamber
- Vacuum chamber, gas-delivery and foreline component manufacturers — bodies, manifolds, seal interfaces
- Wafer-handling and automation suppliers — end effectors, chucks, lift pins, robot arms, frame structures
- Thermal management suppliers — liquid cold plates, showerheads, heat spreaders and micro-channel parts
- Typical stocks: 6061 and 5083 aluminum, 316L stainless, aluminium-silicon-carbide, and selected ceramics and quartz handled as a separate review
If your part is a general aluminum housing with no cleanliness or vacuum requirement, the General Mechanical hub is the better entry. This hub assumes the part will be judged on what comes off it, not only on what it measures.
CORE APPEAL
Three acceptance criteria that replace the diameter callout
Semiconductor work is not harder to machine than hydraulic work. It is harder to accept, because the failure modes are not visible on the inspection report:
- Particle generation. A rolled-over edge, a torn thread or a burr at a cross hole sheds material every time the part is handled or cycled. Cleaning removes what is loose; it does not remove what is attached and ready to break off.
- Trapped volume. Blind holes, intersecting passages and unvented cavities hold cleaning fluid, machining residue or moisture. In a vacuum or gas path that becomes contamination and, at worst, a virtual leak that no leak detector will localise easily.
- Surface for downstream coating. Plating, anodising and sealing all fail on a surface that was smeared rather than cut. A burnished wall can pass a roughness check and still reject adhesion.
This hub stays at qualification level. Feature-level cutting routes, channel geometry and flatness handling live on the three subpages — they are not restated here.
PROCESS SNAPSHOT
Tool map for vacuum and semiconductor parts
| Need | Common path | HENTRY entry |
|---|---|---|
| Faces and pockets in aluminum plate | PCD for non-ferrous faces where smearing or tool life is the limit; carbide where the geometry is the limit | PCD Milling Cutter · PCD Helical End Mill |
| Gas passages and bolt patterns | Carbide drill matched to the alloy, with a deburr plan written into the sequence | Carbide Drill for Aluminum · Carbide Drill for Stainless |
| Seal grooves and O-ring faces | Form or groove geometry cut clean in one pass, because a second pass adds a witness line | Grooving Tools · Custom End Mills |
| Small features and vent holes | Micro drills with a defined entry, since a wandering micro hole becomes a trapped pocket | Micro Carbide Drills |
| Edge breaks on sealing and handling faces | Chamfer or spotface geometry that cuts rather than rubs | PCD Chamfer / Spotface |
SUB-SOLUTIONS
Choose the page that matches your part
Wafer handling component machining
End effectors, chucks, lift pins and frame structures — flatness, edge quality and particle generation on lightweight aluminum.
Open wafer handling →Semiconductor cooling plate machining
Liquid cold plates and micro-channel parts — fin geometry, channel burr and the brazing face that has to stay flat.
Open cooling plates →WHEN TO LEAVE THIS HUB
Use a different scenario when the job changes
- The part carries a moving spool or a pressure-tight bore — hydraulic valve bodies and manifolds → Hydraulic & Fluid Power hub.
- Micro features with no cleanliness requirement — general small-diameter drilling → Micro-Precision & Special hub.
- Ceramic, quartz or graphite parts — a different material family with different failure modes; reviewed case by case, not from this hub.
- Plain structural brackets and covers — no vacuum, no particle limit → General Mechanical hub.
RFQ CHECKLIST
What to send for a semiconductor part review
- Drawing and revision, with the surfaces that touch process gas, plasma or wafer marked
- Material and temper — 6061-T6, 5083, 316L, AlSiC, and whether it is stress-relieved
- Cleanliness or particle requirement, and how it is verified
- Leak-rate or vacuum requirement, with the test method
- Downstream finish — plating, anodising, passivation, bonding — and its surface expectation
- Flatness, parallelism and seal-groove callouts, plus the inspection method
FAQ
Quick answers before you RFQ
Does the tool choice really change particle performance, or is that a cleaning problem?
Both, and they are not separable. Cleaning removes loose material; it cannot remove an edge that is folded over and waiting to break away. A cut edge and a smeared edge can measure the same roughness and behave differently in service. That is why the edge geometry is reviewed with the cleaning step rather than after it.
Is PCD the default for aluminum vacuum parts?
No. PCD is the right answer where the limit is smearing, built-up edge or tool life on a long aluminum run. Where the limit is a deep pocket, a thin rib or an interrupted cut, carbide geometry wins and PCD adds cost without benefit. The material grade and the feature decide, not the industry label.
How do you deal with blind holes that have to be clean?
By not designing the problem into the process where possible: venting, through-holes, or a drilling sequence that lets chips leave the way they came in. Where the print fixes a blind hole, the tool and the sequence are chosen so the bottom is cut rather than packed. The chamber component subpage covers this in detail.
Can you machine ceramic or quartz parts?
Not from this hub. Those materials fail by chipping and fracture rather than by burr, and the process chain is different. Raise them separately on the RFQ and they are reviewed as their own case.
Where do micro-channel cooling plates belong?
Under Semiconductor Cooling Plate Machining. The channel geometry, the fin wall thickness and the brazing face flatness are a milling and clamping problem rather than a drilling problem, which is why it sits on its own page.
ENGINEERING QUOTE
Send the print with the contact surfaces and the cleanliness call marked
Primary tooling entries for this hub: PCD milling cutters, carbide drills for aluminum and stainless, grooving geometry and micro drills. Downstream finish expectations are confirmed before quoting.