What is an aluminum PCB?
Aluminum-based circuit board is a circuit board called PCB circuit board production.
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The realization of the TV products is also good box products, various manufacturers are in the remote control for different attempts, including convenient voice control, somatosensory gyroscopes, and based on Bluetooth upgrades, more power-saving features also make the remote control Equipped with no need to aim at the remote control of the Bluetooth link function, this millet to everyone bring the answer is a touch remote control, this remote control based on the author's experience, the degree of practicality is not very good, the reason will be given in detail later In fact, as a quasi-rice, the author was also previously Xiaomi excellent MIUI TV TV system, and Xiaomi TV's outstanding performance brainwashed, for this touch remote control, although the experience is not bad, but it is very general.
The product we tested today is different from the previous millet box 3 series on the system. At the previous millet conference, Xiaomi’s TV product first introduced this latest system function. Xiaomi used to have this system. The biggest highlight of the upgrade was explained in detail. Now this feature has finally been implemented on the box product. This millet box 3s is also known as "the world's first TV box product with an artificial intelligence system" because of this upgrade. Now, we don't have much gossip, but now we will begin the 3s appearance of this millet box.
Millet box ancestral appearance work is still excellent millet box 3s is still used millet TV box product appearance before, the material is still a fine texture of ABS green plastic, look and feel is very good, fine grinding surface grinding process to millet box 3s feel very moist, Although the box is very small, but the weight is really hate, it can be seen that the materials still maintain the excellent tradition of millet box products. Although this appearance does not have too many innovations, it is good to maintain the excellent quality of its products. It can be for many years. If you make products on a day, this kind of persistence is always difficult. 
MIUI system embraces "artificial intelligence"
At the previous millet conference, Xiaomi formally announced its own research and development of artificial intelligence systems, and MIUI for artificial intelligence upgrades, this time millet's "artificial intelligence" from the author's point of view, is still relatively junior At this stage, the so-called "artificial intelligence television system" under the concept of millet is to start with the latitude, labels, and user groups, and then carry out a deep excavation of the film source, and then present it with a patch wall puzzle wall to select a total of users. 
Millet's remote control is only a relatively small one, the box itself and the system are very good, excellent hardware, excellent decoding capabilities, 4K video and HDR video playback capabilities, dual-band WIFI signal protocol, Full-featured and superior performance, MIUI system's ease of use and low cost of learning, these are outstanding highlights of this box can not be ignored, millet box 3s from any point of view, are considered to be a very good TV box .
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PCB aluminum substrate is a unique metal-based copper clad laminate. Aluminum Base Board has good thermal conductivity, electrical insulation performance and mechanical processing performance.
â—Aluminum base board surface mount technology (SMT); Aluminum base board has good heat dissipation performance in the circuit design scheme;
â—Aluminum base board can lower the temperature, improve the power density and reliability of the product, and prolong the service life of the product;
â—Aluminum base board can reduce the volume and reduce the cost of hardware and assembly;
â—Aluminum base board can replace ceramic substrate printed board for better mechanical endurance.
PCB aluminum-based copper clad laminate is a metal circuit board material, which is composed of copper foil, a thermally conductive insulating layer and a metal substrate. Its structure is divided into three layers:
Circuit layer: equivalent to the copper clad laminate of ordinary PCB, the thickness of the circuit copper foil is 1oz to 10oz.
Insulation layer: The insulation layer is a layer of low thermal resistance thermally conductive insulating material. Thickness: 0.003" to 0.006" inches is the core technology of aluminum-based copper clad laminates, which has obtained UL certification.
Base layer: It is a metal substrate, generally aluminum or optional copper. Aluminum-based copper clad laminate and traditional epoxy glass cloth laminate, etc.
The PCB aluminum substrate is composed of a circuit layer, a thermally conductive insulating layer and a metal base layer; the circuit layer (ie, copper foil) is usually etched to form a printed circuit to connect the various components of the assembly. In general, the circuit layer requires a large current-carrying Therefore, thicker copper foil should be used, the thickness is generally 35μm~280μm;
The thermal insulation layer is the core technology of the PCB aluminum substrate. It is generally composed of a special polymer filled with special ceramics. It has low thermal resistance, excellent viscoelasticity, thermal aging resistance, and can withstand mechanical and thermal stress. IMS-H01, IMS-H02 and LED-0601 and other high-performance PCB aluminum substrates thermally conductive insulation layer is the use of this technology, so that it has extremely good thermal conductivity and high-strength electrical insulation performance;
The metal base layer is the supporting member of the aluminum substrate and requires high thermal conductivity. Generally, it is aluminum plate, but copper plate can also be used (copper plate can provide better thermal conductivity), which is suitable for conventional machining such as drilling, punching and cutting. Compared with other materials, PCB materials have incomparable advantages. Suitable for Surface-Mount (SMT) &BGA Assembly of power components. No radiator is needed, the volume is greatly reduced, the heat dissipation effect is excellent, and the insulation performance and mechanical performance are good.
1. Audio equipment: input and output amplifiers, balanced amplifiers, audio amplifiers, preamplifiers, power amplifiers, etc.
2. Power equipment: 4 Layer Power Line Circuits switching regulator, DC/AC converter, SW regulator, etc.
3. Communication electronic equipment: high-frequency amplifier `filtering electrical appliance` transmission circuit.
4. Office automation equipment: motor drives, etc.
5. Automobile: electronic regulator `igniter` power controller, etc.
6. Computer: CPU board, floppy disk drive, power supply device, etc.
7. Power module: converter `solid relay` rectifier bridge, etc.
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