Product Overview

Black alumina substrates are precision ceramic components manufactured from high-purity aluminum oxide (Al?O?) materials with a distinctive black appearance. They provide excellent electrical insulation, thermal stability, mechanical strength, chemical resistance, and dimensional accuracy, making them suitable for advanced electronic and industrial applications requiring reliable performance.

These ceramic substrates are commonly used as insulating substrates, LED components, electronic packaging parts, sensor bases, and precision mounting plates. Custom sizes, thicknesses, holes, patterns, and surface finishes are available according to customer drawings, CAD files, or specific application requirements.

Applications & Industries

Black alumina substrates are widely used in:

• Electronic Manufacturing: insulating substrates, circuit support parts, and precision assembly components.
• LED Industry: reflective substrates, LED packaging components, and heat-resistant supports.
• Semiconductor Equipment: precision fixtures, insulation components, and process support parts.
• Optoelectronics: optical components and electronic packaging structures requiring stable performance.
• Sensor Manufacturing: sensor bases and electrical isolation components.
• Industrial Automation: customized ceramic mounting and structural parts.

Manufacturing Process

The production process includes alumina powder preparation, ceramic forming, high-temperature sintering, precision machining, surface grinding, polishing, and quality inspection.

Available processes include:

• Dry pressing and molding
• Ceramic sintering
• CNC ceramic machining
• Laser cutting and drilling
• Diamond grinding and surface finishing

Advanced ceramic processing technologies are used to achieve accurate dimensions, smooth surfaces, and consistent material properties.

Machining Capability & Equipment

Our black alumina substrates are manufactured using:

• CNC ceramic machining centers
• Precision surface grinding machines
• Laser processing equipment
• Diamond grinding systems
• Coordinate Measuring Machines (CMM)

Typical machining tolerance can reach ±0.01 mm, with customized control of thickness, flatness, parallelism, hole position accuracy, dimensions, and surface roughness.

Material Options

Available alumina ceramic grades include:

• 95% Alumina: suitable for general insulation and structural applications.
• 96% Alumina: widely used for electronic and industrial components.
• 99% Alumina: provides higher purity, wear resistance, and chemical stability.
• 99.5% Alumina: ideal for semiconductor and high-performance applications.

Customized Black Alumina Substrate Solutions

We provide complete customization services from material selection and structural design to precision machining and inspection. Our black alumina substrates deliver excellent insulation, thermal stability, mechanical strength, and dimensional accuracy for electronics, LED, semiconductor, and advanced industrial applications.