中文
Murata Manufacturing Co., Chip Multilayer ceramic capacitors for car use launched the main product is able to meet automotive reliability requirements of the GCM series. The series has the following characteristics: the requirements of AEC-Q200 standards; nickel barrier terminals to give the solder leaching with high resistance for reflow soldering and wave soldering; R7/C7/5C Series Operating Temperature Range: -55 to 125 ° C; are available to choose from the length and width of bristle thickness of 0.6 × 0.3 × 0.3mm thickness of the micro to the length and width of bristle for a variety of dimensions of 3.2 × 2.5 × 2.5mm; paper with embossed tape and reel packaging, you can automatically mount; for lead-free products.
The capacitors are widely used in electronic equipment including Chip multilayer ceramic capacitors, tantalum capacitors and aluminum electrolytic capacitors. Ceramic capacitors with high dielectric constant capacitor ceramics (barium titanate, titanium dioxide) squeezed into the tube, wafer, or disc as a medium, and burn infiltration silver-plated ceramic made as the Welding Electrodes . It also points the high-frequency ceramic and low-frequency ceramic dielectric two. Tantalum capacitors stands as tantalum electrolytic capacitors, also belong to the kind of electrolytic capacitor, tantalum do media, unlike the ordinary electrolytic capacitor using the electrolyte tantalum capacitors do not need to be used like an ordinary electrolytic capacitors as plating of aluminum capacitor paper burn The system itself is almost no inductance, but also limits its capacity. Which is characterized by long life, high temperature, high accuracy, high-frequency filter change excellent, but the capacity is smaller, the price is more expensive than aluminum capacitors, and resistance to voltage and current capability is weak. Chip multilayer ceramic capacitors capacitance is smaller than other types of capacitors, so use is limited. If a large capacity problem to be resolved smoothly, it will be tantalum capacitors and aluminum electrolytic capacitors replaced with higher reliability Chip multilayer ceramic capacitors.
Murata Manufacturing Co., Ltd. has been in the original tantalum capacitors for the mainstream of 4.7μF to 100μF range, to achieve a steady increase of the sheet multilayer ceramic capacitors varieties, in the GCM series introduced a maximum capacitance of 47μF (withstand voltage 6.3V) varieties. Vehicle equipment used in capacitors, multilayer ceramic products account for a proportion of the future is expected to rapidly increase.
To increase the electrostatic capacity of the sheet multilayer ceramic capacitor, the key is thinning of the dielectric layer. Chip multilayer ceramic capacitors using overlapping formation by a sheet of ceramic dielectric multilayer structure. Layered dielectric body more layers, the greater the capacitance. Therefore, the thinning of the dielectric body and increase its number of layers, and can maintain the same dimensions of the components, the capacitance increases. However, only thinning of the dielectric body, may cause the pressure drop and so detrimental to reliability. To solve these problems, Chengdu and the Aluminium Welding Wires and dielectric planarization and other technologies essential to constitute the dielectric particles of miniaturization. Murata Manufacturing Co., by virtue of the advantage from the material to the development of manufacturing equipment, train, and to provide greater capacity of capacitor products.
In addition, Murata also launched the car using the dielectric thin layer technology development with a small product. "0402" (1.0 x 0.5mm) GCM15 series and "0201" (0.6 x 0.3mm) GCM03 series. With the limited space of a car equipped with Denso equipment increasing miniaturization will place increasing demands, the needs of the smaller 0201 products will be gradually expanded.
Particularly high in the engine and gearbox body temperature direct encapsulation of electronic circuits "mechatronics," the trend is growing, the maximum operating temperature range of vehicle components has been increased to 150 ° C. Murata Manufacturing Co., Ltd. In response to this demand, the introduction of the working temperature range to -55 ° C to 150 ° C products. More than 150 ° C, it is difficult to solder package, also launched a 150 ℃ high temperature to ensure product available conductive adhesives, encapsulation, "the GCG series. Will be set at the copper electrode surface of Ni / Sn layer replaced with Ag / Pd, the application of conductive adhesives.
In order to meet the car manufacturers and automotive equipment manufacturers to further improve the reliability requirements, Murata Manufacturing Co., developed the bottom of the external electrode conductive resin with GCJ series. Is characterized by a dielectric body make an effort through the construction of the external electrode, by external force to prevent internal cracking occurs. GCJ series set resin in the copper electrode on the external electrodes lower electrode, and its lateral Ni / Sn plating processing independent structure. In addition, by optimizing the shape of the external electrode, inhibited by the physical force applied to the internal dielectric stresses. Under large stress, resin electrode layer off easily to prevent the dielectric body by the large stress cracking occurs.
In the past one hundred years, has been difficult in some way does not require Welding Electrode or aluminum of any product. The most common welding process has been in several forms of arc welding. In its most basic form, the process is actually very simple. Two similar metal. Put them together and then apply enough heat, increase the melting point close to. And then apply a patchwork of filler metals and fuse.
The basic arc welding using a machine to produce an adjustable current. This current through the wire, in its ultimate holding coated electrode device. Run wire from the welding machine, called the ground, and attached along the weld metal.
The next bit of metal in such a way, it completes the circuit between the establishment of an arc electrode and metal electrode. The arc produces heat heating metal parts and rod integration into welding, do the two metals, will be integrated into a single General Assembly. Certainly better than the more complex arc must adjust to a variety of metal rods and a variety of coating thickness can also be used for the metal.
The system is the most common varieties of steel is very good, you want to join pieces of nearly the same thickness. Basic arc Welding Fluxmachine is not working, need to be added to the thick, very thick slices. It is impossible to properly control the heat generated by the arc completely melted enough heat to make a thick metal with a thinner piece. In addition, exotic metals such as aluminum many times can not be submerged arc welding. In this case, the TIG welding machine excels.
His name is from a technical (tungsten inert gas) to derive a TIG welding machine is a system, the coated electrode in the basic arc so common standard. Contrary coated electrode shield welding for a variety of gases.
Argon arc welder called arc or GTIG-Heli (gas tungsten inert gas) welder. This system is indeed a state-of-the-art welding machine also uses a machine to generate electricity. Ground can also be used. At present is through a wire, but the difference in the end of the line of business, making this system work in secret.
Replaced by a clamp-held electrodes, TIG machine known as a short-term tungsten torch holders. The design of the torch issued a shield, from air pollution weld welding weld molten pool surrounding gas.
Use a different gas again depends on the welding. Many gas mixtures, argon is the most common gas. The torch is also provided within the flow of water to cool the torch.
An important feature of this system is that the arc heat fuse the metal is controlled by foot pedals, which makes it very easy to adjust the heat, thin pieces of Welding Rod a thick material. Bare filler rod is used to complete the welding. In addition, the tungsten rod Welding Materialsprocess does not consume, but it must reshape the go, because it is wearing welding.
This is basically described in the TIG welding process. Of course, there is more involved with any metal processing, especially aluminum and other special metal welding.
