Which surfaces are coated in a PVD chamber?

The fixtures, shields, part holders, and walls where unwanted deposit accumulates. The part being coated is never treated: the goal is to ease cleaning of the rest of the chamber.

Does the coating contaminate the vacuum?

It depends on the product and the conditions. That is why the vacuum level and process temperature are stated during selection, and behaviour should be validated over one campaign before generalizing its use.

How often is it renewed?

At each fixture maintenance cycle, when the accumulated deposit is stripped. The routine is set alongside the chamber cleaning schedule.

Supports with graphite release coating in a PVD chamber context

Coatings / Release Agents

PVD release coatings

Graphite lubricants applied as paint are used in physical vapor deposition (PVD) processes.

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Vacuum-process release coating

Also known as: Anti-stick paint for PVD · Graphite coating for vacuum fixtures · Shield protection in PVD chambers · Release agent for vacuum coating

[ Technical summary ]

In PVD processes the deposited material does not distinguish between the part and the fixtures, shields, and chamber walls, where it builds up layer on layer until it flakes into particles that contaminate the process. An anti-stick graphite coating on those surfaces allows the accumulated deposit to be removed without abrasive cleaning, shortening chamber maintenance time and extending fixture life.

[ Problem it solves ]

Allow deposit built up on fixtures and shields to be removed without abrasive cleaning, avoiding the particle flaking that contaminates the chamber.

Operating conditions

PVD
Vacuum coatings
Protection of supports and fixtures

When it is suitable

Deposit builds up on fixtures, shields, and jigs
Fixture cleaning consumes chamber time
Particle flaking affects coating quality
Surfaces can be coated between campaigns

When it may not be suitable

The process does not tolerate carbon inside the chamber
The surface to protect is the coated part itself
The product cannot be validated in the plant before adopting it in production

Process challenges

Deposit adhesion
Difficult cleaning of supports
Chamber contamination

Advantages

Anti-stick
Vacuum stability depending on product
Easy reapplication

Limitations

Not a hydrodynamic oil lubricant
May stain light-colored surfaces
Performance depends on surface preparation and reapplication

[ Critical selection variables ]

These variables define the grade and the geometry. Actual values are confirmed against the grade datasheet.

Vacuum levelDecisive
Operating temperatureDecisive
Required purity and allowable contaminationDecisive
Application methodRelevant
Substrate or surface to be treatedRelevant
Reapplication frequencyRelevant

[ Required material properties ]

Properties that guide selection. Numerical values come from each grade's datasheet.

Critical properties

Lubricating film formation
Thermal stability
Particle size distribution
Purity

Secondary properties

Chemical resistance
Dispersibility

[ Related ]

[ Frequently asked questions ]

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Technical content reviewed by ESGRAF — Last reviewed: September 8, 2026

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