Precision Gold Metallized Sapphire Components for Optical, Electronic and

Product Specification

We provide custom sapphire gold metallization services for precision sapphire components used in optical, electronic, sensor, semiconductor and advanced packaging applications.

Gold metallization can be selectively applied to designated areas of sapphire components according to customer drawings, including edges, frames, rings, contact areas and custom patterns.

We support a wide range of sapphire geometries, including round windows, square windows, rectangular substrates, rings, frames and custom-shaped sapphire parts. Both prototype quantities and production batches can be supported.

Custom Gold Metallization on Sapphire

Sapphire is widely used in demanding applications because of its excellent hardness, optical performance, electrical insulation and chemical stability. However, many assemblies require a metalized area on the sapphire surface for subsequent bonding, electrical connection, sealing or integration with other components.

Our sapphire metallization service allows customers to specify exactly where the metallic layer should be applied.

Typical configurations include:

• Gold metallized sapphire edges
• Gold frames around optical apertures
• Circular gold metallization patterns
• Square and rectangular metallized patterns
• Localized metallization areas
• Peripheral metallization
• Custom patterned metallization
• Double-side or single-side metallization
• Metallization on custom sapphire components

The metallization geometry can be manufactured according to customer drawings and assembly requirements.

Sapphire Component Types

We can provide metallization processing for different sapphire parts, including:

Sapphire Windows

Gold metallization can be applied around the perimeter while keeping the central optical area clear.

This structure is commonly used when an optical window must be integrated into a metal housing, sensor package or precision assembly.

Sapphire Substrates

Square, rectangular and custom sapphire substrates can be processed with localized metallic patterns according to customer designs.

Round Sapphire Components

Circular sapphire windows and discs can be manufactured with ring-shaped gold metallization around the edge or other specified areas.

Custom-Shaped Sapphire Parts

In addition to standard round and rectangular parts, we can support specially shaped sapphire components based on customer drawings.

Customizable Specifications

Gold layer structure, metallization thickness and process requirements can be evaluated according to the customer's application and drawing.

Why Gold Metallization Is Used on Sapphire

Gold is frequently selected as the exposed metal layer because of its excellent oxidation resistance, electrical conductivity and compatibility with many precision assembly processes.

Combining sapphire with localized gold metallization provides the advantages of both materials:

Sapphire provides:

• High hardness
• Excellent wear resistance
• Electrical insulation
• High-temperature stability
• Chemical resistance
• Good optical transparency
• Dimensional stability

Gold metallization provides:

• Conductive contact areas
• Oxidation-resistant metal surfaces
• Defined bonding or joining areas
• Localized metallic interfaces
• Integration with electronic and optical packages

The result is a precision component that combines the mechanical and optical properties of sapphire with functional metallic regions.

Precision Pattern Control

For many B2B applications, the challenge is not simply depositing gold onto sapphire.

The important requirement is controlling:

• Metallized area dimensions
• Pattern position
• Edge definition
• Optical clear aperture
• Alignment between sapphire geometry and metal pattern
• Surface cleanliness
• Coating consistency
• Batch-to-batch repeatability

We manufacture according to customer drawings so the metallized pattern can match the final assembly structure.

For optical windows, particular attention can be given to keeping the central optical aperture free from unwanted metallization.

Custom Shapes and Small Precision Parts

Many sapphire metallization projects involve components only a few millimeters or tens of millimeters in size.

Handling, positioning and maintaining consistent metallization on small sapphire components can therefore be challenging.

We support custom processing of small sapphire windows and substrates, including:

• Small round sapphire windows
• Miniature sapphire discs
• Square sapphire windows
• Rectangular sapphire plates
• Sapphire frames
• Sapphire rings
• Special geometry sapphire parts

Custom fixtures and processing methods can be evaluated for repeat production.

Applications

Gold metallized sapphire components can be used in:

• Optical sensor packages
• Laser systems
• Photonic devices
• Semiconductor equipment
• Electronic packaging
• Precision optical modules
• Detector windows
• Vacuum and hermetic assemblies
• High-temperature sensors
• Scientific instruments
• Aerospace optical systems
• Custom electronic and optoelectronic components

OEM Sapphire Metallization Service

We focus on custom manufacturing rather than only supplying standard sapphire parts.

Customers can provide a drawing indicating:

• Sapphire dimensions
• Thickness
• Sapphire orientation if required
• Surface finish
• Optical aperture
• Metallization location
• Metallization width
• Pattern dimensions
• Gold layer requirements
• Dimensional tolerances
• Quantity

Our engineering team can evaluate the sapphire machining and metallization requirements together, reducing the need to source sapphire processing and metallization from separate suppliers.

Prototype and Batch Production

For new projects, small quantities can be used for engineering evaluation before moving into larger production batches.

Typical project stages may include:

Drawing Review → Sapphire Machining → Polishing → Cleaning → Metallization → Inspection → Packaging

The exact manufacturing route depends on the component structure and metallization requirements.

Quality Inspection

Inspection requirements can be customized according to the application.

Available inspection items may include:

• Overall dimensions
• Thickness
• Metallization pattern dimensions
• Pattern position
• Visual appearance
• Surface condition
• Optical clear aperture
• Edge condition
• Metallized area consistency

Additional inspection requirements can be discussed during quotation.

Information Required for Quotation

For a fast quotation, please provide:

1. Sapphire component drawing
2. Overall dimensions
3. Thickness
4. Required quantity
5. Sapphire orientation, if specified
6. Surface polishing requirements
7. Metallization area and pattern
8. Gold layer or metal stack requirements, if already defined
9. Dimensional tolerances
10. Application or assembly method

If the metallization structure has not yet been finalized, you can also send us the assembly drawing for evaluation.

FAQ

Can you make gold metallization only around the edge of a sapphire window?

Yes. Localized perimeter or frame-style metallization can be produced according to the customer's drawing while keeping the required optical aperture clear.

Can you process both round and square sapphire parts?

Yes. Round, square, rectangular and custom-shaped sapphire components can be evaluated for metallization.

Can the gold pattern be customized?

Yes. Ring-shaped, frame-shaped, edge and other localized metallization patterns can be manufactured according to drawings.

Can you provide the sapphire component and metallization together?

Yes. We can support sapphire machining, polishing and subsequent metallization as an integrated custom manufacturing service.

Do you support prototype quantities?

Yes. Prototype and small-batch production can be supported for qualification before volume production.