What is Alumina Ceramic Substrate? Alumina substrate thickness

Does the challenge of this PCB material slow down your project?

• Is your current substrate too hot and shorten the life of your high power component?
• Do you lose signal quality in RF or microwave design because the dielectric constant is not stable enough?
• Does the hard environment cause your board to be curved, cracked, or fail over time?

Most technology, we work with engineers who face this right problem every day.

• Our alumina ceramic substrate provides thermal stability, electricity performance, and mechanical strength needed for demanding applications.
• With a value of 96% to 99.6% purity, thickness that is tailored to your design, and precision encouragement for complex layout, we help you make PCBs that run cooler, last longer, and do more reliable – even in extreme conditions.

If you have ever wondered about the specifications of the alumina ceramic substrate data sheet, dielectric constant, thickness, price, or how they compare with other materials, you are in the right place. This guide answers the most common questions raised by engineers and buyers – with clear and practical insight.

What is Alumina Ceramic Substrate?

The alumina ceramic substrate is a flat basic material made of aluminum oxide (alâ ‚of AF), disinteled at high temperatures. It offers a rigid and thermal stable foundation for the installation of electronic circuits.

The most common value is 96% Alumina And 99.6% aluminaWhere the number reflects the purity of the material. A higher purity increases electrical insulation and reduces dielectric loss, making it suitable for sensitive or high frequency design.

Engineers prefer alumina substrates because they:

• Extreme heat resistant without distortion.
• Hold wear, corrosion, and electrical disorders.
• Match thermal expansion of semiconductor material, reduce mechanical stress during the thermal cycle.

From the LED module to the aerospace system, the alumina substrate protects the circuit in the environment where other materials will fail.

Alumina Substrate Type

Although the alumina substrate shares the same basic ingredients, they come in various forms to suit different needs:

• 96% Alumina Substrate – Industrial Standards for General Electronics. Balanced Thermal Conductivity (~ 20â € “25 W/Mâ · K) and dielectric properties.
• 99.6% Alumina Substrate – A higher purity for RF, microwave, and high precision devices.
• Alumina substrate metal-pra-draped metal with conductive layers such as gold, silver, or copper using a thick or thin film process.
• The alumina substrate is special-produced by laser cutting or milling for special layout.

The choice depends on the performance requirements, the assembly method, and your budget.

The thickness of the thickness of the alumina substrate

Thickness plays an important role in mechanical stability, thermal transfer, and dielectric strength.

Standard options include:

• 0.25 mm – very good for compact modules with high heat transfer requirements.
• 0.38 mm – Balanced options for thermal strength and performance.
• 0.5 mm – common on the LED board and power module.
• mm – used in highly binding or mechanical emphasized environments.

A thinner substrate eliminates heat faster but more fragile. Thicker substrates provide stiffness but can slow down thermal transfer. The choice depends on the heat output and the resistance requirements of your device.

Dielectric Constants of Alumina Substrates and Its Impacts

The dielectric constant (îμR) measures the ability of the material to store electrical energy in the electric field. For alumina substrates, usually ranging from 9.4 to 10.2 at 1 MHz.

Stable dielectric constant is very important to maintain signal integrity in RF and micro wave circuits. If the dielectric constant is too high or unstable, the signal can slow down or distort, especially in the high -speed data pathway.

Designers choose alumina when they need:

• Low signal loss in high frequency design.
• Stable electricity performance during temperature changes.
• The reliable insulation in a compact multilayer package.

Alumina substrate data sheet

When selecting alumina ceramic substrates, it has a clear reference for mechanical, thermal, and electric parameters ensures your design meets performance and safety requirements. Below is a consolidated data sheet for 96% and 99.6% alumina standard.

Key Takeaway:

• 96% Alumina Cost -effective for Electronics of General Reliability.
• 99.6% alumina is ideal for the optical system of RF, microwave, and precision where dielectric performance and purity are very important.

The use of popular alumina ceramics

Alumina ceramics are used in industries where heat, reliability, and precision cannot be negotiated.

Applications include:

• LED lighting: Increasing heat dissipation, extending LED life.
• Power Electronics: Handling high voltage and heat in the converter, inverter, and drive motor.
• Medical devices: offer biocompatibility and electrical stability for implant and diagnostic equipment.
• Aerospace: Extreme thermal Cycling Resistant and Mechanical Voltage.
• Automotive electronics: Can be relied upon for ECU boards and EV power systems.
• RF & Microwave: Stable dielectric constant supports high frequency communication.

Alumina ceramic substrate prices

The alumina ceramic substrate does not have a certain price, it varies based on:

• Material purity: 99.6% alumina worth more than 96%.
• Thickness: thicker substrates use more materials and require longer processing.
• Size and shape: Special cutting increases machinery costs.
• Metalization: The gold or silver layer adds costs.
• Orders quantity: a greater rate reduces price per unit.

As a general guide, simple standard substrates can cost a few dollars, while large forms, high purity, custom shapes can reach $ 20â € “$ 50+ per piece. For alumina ceramic PCBs, the price is far away, and must depend on specific requirements, such as metalized methods, shapes, through holes, single sides or multiple or multi-lanin.

Alumina substrate vs. Silicon Nitrida Substrate: How to Choose?

The alumina substrate and silicone nitride substrate are good material bases for ceramic PCBs. Each has its nature and benefits. When choosing between alumina and silicon nitrida come to the thermal performance priorities, mechanical strength, and costs. Here comparison side by side:

In short:

• Choose alumina when you need high dielectric performance, good thermal conductivity, and economic costs.
• Choose silicon nitrida when your priority is extreme thermal cycling resistance, very high mechanical strength, or very high cooling module.

Why choose the best technology for alumina ceramic substrates?

The best technology produces alumina ceramic substrates to meet strict industrial requirements. We are certified for ISO9001, ISO13485, IATF16949, and AS9100D, including industrial, medical, automotive, and detailed applications.

We use the MES system to ensure the trace of raw materials to the finished product. Our technical team works closely with customers to choose the right value, thickness, and metallization for optimal results. Competitive prices, proper machining, and reliable shipping make us trusted choices for customers around the world.

FAQ

1. What is the maximum operating temperature of the alumina substrate?

Up to 1500 ° C in the inert or vacuum environment; The metalized layer can limit this.

2. Can you alumina ceramic machine without damaging it?

Yes, using diamond milling, laser cutting, or ultrasonic machining.

3. Is the alumina substrate better for the RF circuit than FR4?

Yes, because of a stable dielectric constant and lower signal loss.

4. How to choose the right thickness?

Match thermal loads, mechanical requirements, and assembly constraints.

5. What is the standard waiting time?

About 3â € “5 weeks depending on the complexity and size of the order.

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