Aluminum nitride ceramic cap

Aluminum nitride (AlN) ceramic cap is a precision ceramic component that combines high thermal conductivity (up to 170-230W/m · K), excellent electrical insulation, and a thermal expansion coefficient that matches silicon. It is designed specifically for high demand scenarios such as laser packaging, high-power semiconductor modules, and high-temperature sensors. It can achieve efficient heat dissipation and reliable insulation simultaneously, and is a key material for solving the contradiction between “overheating” and “short circuit” in modern electronic devices.

Product FAQ: Addressing Your Core Pain Points
Q: My high-power laser diode generates severe heat during operation. Although the metal packaging has good heat dissipation, it is prone to short circuits, and the plastic packaging cannot withstand high temperatures. What should I do?
Answer: Our aluminum nitride ceramic cap has a thermal conductivity 5-10 times higher than aluminum oxide, and its heat dissipation ability is comparable to that of metals. At the same time, it has excellent electrical insulation performance (volume resistivity ≥ 10 ¹⁴Ω· cm), which can ensure circuit safety isolation while efficiently dissipating heat.
Q: In semiconductor etching equipment, we need components that are resistant to plasma erosion. The lifespan of ordinary materials is too short, and frequent replacement affects production capacity. Is there a solution?
Answer: Aluminum nitride ceramics have extremely strong resistance to plasma erosion and high temperature performance, and can maintain stable shape and size in harsh process environments for a long time, greatly reducing the number of maintenance shutdowns.
Q: I need a ceramic cap with a special shape, strict requirements for aperture and wall thickness. Standard products on the market cannot be used. Can it be customized according to the picture?
Answer: Absolutely possible. We provide “customized drawing” services. Whether your ceramic cap requires a complex inner hole structure, ultra-thin wall thickness, or strict dimensional tolerances (up to ± 0.01mm), we can meet your personalized needs through precision molding and processing technology.

Product core advantage: not limited to thermal conductivity

1. Excellent dual performance of thermal conductivity and insulation
   The theoretical thermal conductivity of aluminum nitride ceramics is as high as 320W/(m · K), and industrial products can actually reach 170-230W/(m · K), which is 7-10 times that of aluminum oxide ceramics and comparable to copper and aluminum metals. At the same time, it maintains excellent electrical insulation (insulation strength>15KV/mm), protecting sensitive circuits while transferring heat, solving the problem of additional insulation layers required for metal heat dissipation components.
2. Thermal expansion characteristics matched with semiconductors
   The thermal expansion coefficient of aluminum nitride (about 4.5 × 10 ⁻⁶/℃) is highly matched with semiconductor materials such as silicon and silicon carbide, minimizing chip delamination or solder joint cracking caused by thermal stress and significantly improving packaging reliability.
3. Excellent high temperature and corrosion resistance
   The sublimation decomposition temperature of aluminum nitride under normal pressure is as high as 2450 ° C, and it can still maintain good mechanical properties at high temperatures. It has excellent corrosion resistance to aluminum liquid and other molten metals, as well as acid and alkali corrosion resistance, making it suitable for highly corrosive environments such as chemical and metallurgical industries.
4. Rich specifications and customized services
   We provide full process customization services from standard hat shapes to complex shaped parts:
   -Size range: from micro caps with an inner diameter of 0.5mm to large power module packaging caps
   -Molding process: supports various processes such as dry pressing, injection molding, cold isostatic pressing, etc., to meet different complexity requirements
   -Precision control: Through precision grinding and polishing, the dimensional tolerance can be strictly controlled within ± 0.01mm, and the surface smoothness can reach mirror finish
   -Batch flexibility: We can undertake from small-scale sample trial production to large-scale production

Application case: Solving real-world problems
Case 1: The Heat Dissipation Revolution of Fiber Coupled Laser Modules by a Renowned Laser Manufacturer
-Pain point of demand: The kilowatt level fiber coupled semiconductor laser module produced by this manufacturer requires an additional insulation layer despite the good thermal conductivity of traditional metal packaging caps during long-term high-power operation, resulting in an increase in thermal resistance; However, the aluminum oxide ceramic cap has insufficient thermal conductivity and severe heat accumulation, resulting in laser wavelength drift and shortened lifespan. The average time between failures of the module is less than 3000 hours.
-Solution: We have customized a high thermal conductivity aluminum nitride ceramic encapsulation cap for it. Using high-purity aluminum nitride material and precision injection molding process, an ultra-thin structural cap with a wall thickness of only 0.3mm is produced, maximizing thermal conductivity efficiency in a limited space. At the same time, precise control of the thermal expansion coefficient to match the chip reduces thermal stress.
-Final effect: After replacing the aluminum nitride ceramic cap, the thermal resistance of the module decreased by 42%, the junction temperature of the chip decreased by 25 ° C, and the laser wavelength stability was significantly improved. The average fault free time of the module has been extended to over 12000 hours, reaching the international advanced level. Customers receive an annual increase of over 30% in orders due to improved product reliability.
Case 2: Semiconductor equipment manufacturer – etching machine electrostatic suction cup protective cap
-Pain point of demand: In a semiconductor equipment manufacturer’s plasma etching machine, the protective cap on the edge of the electrostatic suction cup is exposed to high-density plasma environment for a long time. The original quartz cap has insufficient resistance to plasma erosion and needs to be replaced every two months, which not only increases spare parts costs but also leads to frequent shutdowns, affecting wafer production capacity.
-Solution: We have customized a ceramic protective cap with a special curved surface structure using high-purity aluminum nitride material. By utilizing the excellent plasma erosion resistance and thermal shock resistance of aluminum nitride, the cap structure has been redesigned to ensure that it will not crack under severe temperature changes.
-Final effect: The service life of the aluminum nitride ceramic cap is extended to over 18 months, which is 9 times longer than that of the original quartz cap. The annual operating time of the equipment has increased by more than 800 hours, and the production cost of a single wafer has been reduced by about 15%. This solution has been listed by the customer as a standard design for the next generation model.
Case 3: New Energy Vehicle Electronic Control System – Power Module Insulation Thermal Cap
-Pain point of demand: A new energy vehicle electronic control system supplier needs to achieve efficient thermal conductivity and reliable insulation between the high-voltage circuit and the radiator when developing the next generation of high-power density IGBT modules. The traditional solution uses a metal cap and a thermal pad, which has high thermal resistance and insufficient long-term reliability, posing a risk of insulation failure.
-Solution: We have developed a high insulation strength aluminum nitride ceramic pressure contact cap for it, which directly contacts the chip while achieving thermal conductivity and insulation. Ensure flatness and minimize contact thermal resistance through precision grinding.
-Final effect: The thermal resistance of the module is reduced by 30%, and the insulation withstand voltage capability is improved to over 15KV, far exceeding the reliability standards of automotive electronics. This plan has helped customers successfully win designated orders from multiple mainstream car companies, and it is expected that the annual installed capacity will exceed 500000 sets.

We are well aware that in high-tech fields such as semiconductors, optoelectronics, and new energy vehicles, the performance of core components determines the competitiveness of the entire system. If you are looking for aluminum nitride ceramic caps that can simultaneously solve the problems of heat dissipation, insulation, and high temperature resistance, and can be fully customized according to drawings, please click here to consult or submit your drawings for exclusive solutions!

Brudeze Ceramics supplies and sells a wide range of high-quality quartz glass, including alumina ceramics, zirconia ceramics, silicon nitride ceramics, aluminum nitride ceramics, silicon carbide ceramics, boron carbide ceramics, bioceramics, machinable ceramics, etc. We can meet the customization requirements of various ceramic products.