Rare earth elements have enabled products such as cell phones and computer hard drives faster, smaller and lighter. They have been used to make color displays more vivid for televisions, computer screens and other devices. They are also essential for in-ear headphones, microphones, loudspeakers, optical fibers, smartphones and tablets. They have greatly improved our communication and computing abilities.

  • Display phosphors
  • CRT
  • PDP
  • LCD
  • Medical imaging phosphors
  • Lasers
  • Fiber optics
  • Optical temperature sensors

We supply materials with excellent thermal conductivity, controlled thermal expansion coefficients and high purity. Their desirable properties make them ideal for electronic industry. For examples, our products have been used in base plates and heat spreaders to ensure the reliability of these electrical equipments.

At first sight, it should not be a problem that electrical components generate heat. Nowadays, any computer-users can sense that their computer gets warm when it is on. It is because that a proportion of the electrical energy is lost as heat when they are operating. In more detail, heat transfer can also be expressed as heat flux per unit area, which is known as heat flux density. The heat flux density in most of the electronic components can be extreme. For example, the temperature for a rocket nozzle throat may reach as high as 2800oC.

Unlike the rocket nozzle, semiconductor components, used in high-performance electronics, such as radio frequency amplifiers in telecom base stations or power transistors in electronic vehicles, can only withstand a temperature range from 100oC to 200 oC. However, the heat produced in the chips is often localized in a few, small regions, known as hotspots. The local heat flux densities may reach several kilowatts per cm2. Therefore, it is essential to spread and remove the heat from the semiconductors rapidly. It is challenging for our materials.

 Thermal expansion coefficient is another important factor for semiconductors. If the semiconductor and base plates expand and contract at different rates, mechanical stresses may occur when they are exposed to different temperatures. These mechanical stresses may damage the semiconductor or destroy the connection between the chip and the heat spreader. However, you do not have to worry about these issues with our materials. Our materials have optimal thermal expansion coefficient for connecting semiconductors and ceramics.

Our materials are used in semiconductor based plates for wind turbine, trains and other industrial products. They play an important role in power semiconductor modules for inverters (thyristors) and power diodes. Attributed to their desirable thermal expansion coefficient and excellent thermal conductivity, semiconductor base plates form strong bases for sensitive silicon semiconductors which have a module service life of more than 30 years.

Plates made from molybdenum, tungsten, MoCu, WCu, Cu-Mo-Cu and Cu-MoCu-Cu can laminate reliably with the base plates to dissipate the heat generated in electrical components efficiently. This prevents the electrical devices from overheating and increases the product lifetimes. Our heat spreaders help maintain a cool surrounding when used in IGBT modules, RF packages or LED chips. We have also developed a special MoCu composite material for the carrier plates of LED chips, which has a similar thermal expansion coefficient as sapphire and ceramics.

We also supply a variety of coatings for electronics industry. They not only prevent the materials from corrosion, but also improve the solder connection between the semiconductors and our materials.

Rare earth elements are essential in many electronic, optical and magnetic applications.   

Advanced ceramics are used in electrical and electronic including the following aspects: Power Electronics, Electronic Sensors, Wafer production, etc.

Ceramic components in power electronics have vacuum switching tubes, diodes and thyristors as well as highly resilient electric feedthroughs and surge arresters. Based on their high reliability and lifetime in stationary and mobile applications, these components that have been proven effective over decades are used widely.

Power Electronics

The switching of currents with several 1.000 A is not a problem for vacuum switching tubes, not even at high switching frequencies. Another advantage is that additional cooling is not necessary, that makes small component sizes can be realized. As the switching elements are in high-vacuum-tight housing, no oxidation processes will happen, which can reduce the switch power.

Electronic Sensors

Ceramic sensors are often found in machinery and equipment that must meet very strict requirements. In such occasions, they mainly monitor non-electric variables such as, temperature, pressure, moisture content, gas concentration, flow rate, distance, acceleration, and transform these into electrical signals, which are then further processed in downstream electronic devices.

Wafer production

The requirements for wafer production technology are extremely strict, considering it requires geometric properties and zero contamination. In semi-conductor technology, components made of oxide and non-oxide materials are generally used in positions that are essential to obtain the desired wafer geometry. For example, for a 12-inch wafer, the target thickness is 0.7 mm, the deviation from the surface uniformity is 10-6 mm, and the maximum deflection is 25 µm. In order to firmly fix such a wafer on a substrate, a large-sized plate made of ceramic material is often used.

We also provide many semiconductor materials involved in the electronics industry.