Graphene significantly reduces the cost of blue LEDs IBM has invested $3 billion

Almost all semiconductor technology research institutions in the world are trying to make single-layer graphene and regard it as a new generation of IC materials superior to silicon; but now IBM researchers have discovered another kind of graphene material. The advantages can significantly reduce the cost of blue LEDs made with gallium nitride (GaN). We have grown a single-crystal GaN film on wafer size graphene formed from silicon carbide wafers; JeehwanKim, a member of the IBMT.J. Watson Research Center who claims to be the inventor, said that the entire GaN film is transferred to silicon. On the substrate, graphene is still left on the SiC wafer and reused to continue the process of growing the GaN film and transferring the film. He pointed out that this new method is much more cost-effective than the traditional way of using expensive SiC or sapphire wafers and can only be used to grow GaN films, and they found a new way to use graphite. The quality of the film grown on the ene is higher than that of the film grown on other substrates (lower defect density). It is very challenging to grow a single-layer graphene film of wafer size. In order to manufacture IC semiconductor components using graphene, experts have tried many different methods in the past, but unfortunately only partially succeeded; SiC wafers are currently found. And then vaporizing silicon is one of the most reliable methods. And IBM's Kim confirmed that after vaporizing the silicon of the SiC wafer, the remaining graphene film can be safely transferred to the silicon substrate; in addition, they also confirmed that the quality of graphene produced in this way is better than direct The quality of graphene grown on wafers where graphene is to be used. As for the growth of other films on graphene, a new application path has been opened for this material; Kim developed the technology he developed as a direct van der Waalser for growing high quality single crystal GaN films on epitaxial graphene. Crystal method (directvanderWaalsepitaxy). He claims that GaN films or other films grown in this way can be freely implanted onto any substrate to support the fabrication of components such as. Because of the GaN film produced by Kim's lab in the above-mentioned way, it is a successful reuse of graphene on SiC wafers. They believe that this is a new way to use graphene to significantly reduce the manufacturing cost of semiconductor components: we confirmed for the first time It is possible to grow wafer-sized single crystal thin films on graphene, and graphene can be reused; in addition, our research and development results provide a general guideline for growing high quality single crystal semiconductor devices on graphene. After vaporizing the silicon of the SiC wafer, the single layer of graphene can be stripped off and transferred to any substrate, such as crystalline silicon. Because the intact graphene layer is not destroyed after the film grown on it is peeled off, Kim also tries to grow other kinds of semiconductor components on the perfect crystalline graphene plate and then transfer it to other places, for example. Soft substrates; he said that this technology has the opportunity to generate high-frequency transistors, photodetectors, biosensors and other post-silicon era components, and IBM has invested $3 billion over the next five years.

Tent Air Conditioner

TENT AIR CONDITIONER (MOBILE COOLING & HEATING AIR CONDITIONER)

Mobile tent air conditioner is a mobile air conditioning unit developed primarily to provide air conditioning in tents, campings, temporary or transportable buildings, or similar fields. To improve the working or living conditions, tent air conditioners, including military use tent air conditioner, mobile field hospital air conditioner, relief air conditioner, etc

The unit is designed for outside installation with ducted supply and return air. The function is based on a cooling circuit and two powerful fans. The evaporator section contains the evaporator and a radial fan which draws warm internal air through the cold evaporator and blows out the cooled air through the side of the unit. The condenser section contains two condenser coils and a large axial fan returning the heat from the internal air to the outside. Heating function is also available by an opposite circuit.

Features:

1) Wheel Kit

Four-wheel kits are equipped as a basic add-on-solution which make the unit to be applied on site without using any tools. The unit can be transported and moved to the optimal position by one or two people easily. The wheel solution enables rapid and easy deployment of the unit but no need forklift sometimes.

2) Flexible installation

All mobile tent air conditioners are easy to adapt to local conditions. The units can be placed outside of the tents, while they can also be placed half inside and half outside. In order to optimize the cooling effect, the units - as well as the ducts - are better to be placed close to the tent with ducts as short as possible on the outside to minimize solar radiation. Solar shielding of the cooling unit and ducts will further increase performance.

3) Heating and cooling from the same unit

The mobile tent cooling and heating units can also be supplied with a built-in heat function. This makes these units especially useful in geographical areas with extreme differences in daytime and night-time temperatures, such as deserts. Extra electric heating accessories are available to ensure the heating performance.

4) Wide Applications

Working area: Tents, Temporary buildings, Accommodation, Military camps, Relief camps, Workcamps (oil and gas industry), Vehicle cabins, Granaries, Event cooling and heating, Emergency cooling, etc

Working Temperature: It can provide cooling at ambient temperatures up to +60℃, and heating down to -15℃.

Our Service:

1. OEM Service is available;

2. Customized design is available;

3. Fast delivery time.

Sincerely hope to cooperate with partners from all over the world.

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Taizhou Tentcool Electrical Appliance Co., Ltd. , https://www.tentcool.com