What Is a Multilayer Ceramic Capacitor?

Chip multi-layer ceramic dielectric capacitors (MLCCs) --- Chip capacitors for short, are made of ceramic dielectric membranes with printed electrodes (internal electrodes) stacked in a dislocated manner, sintered at one time to form ceramic chips, and then A metal layer (external electrode) is sealed at both ends of the chip to form a monolithic structure, so it is also called a monolithic capacitor.

Multilayer Chip Ceramic Capacitor

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Chip multi-layer ceramic dielectric capacitors (MLCCs) --- Chip capacitors for short, are made of ceramic dielectric membranes with printed electrodes (internal electrodes) stacked in a dislocated manner, sintered at one time to form ceramic chips, and then A metal layer (external electrode) is sealed at both ends of the chip to form a monolithic structure, so it is also called a monolithic capacitor.

The structure of the multilayer chip ceramic capacitor mainly includes three parts: ceramic dielectric, metal internal electrode, and metal external electrode. The multilayer chip ceramic capacitor is a multi-layered structure. In short, it is a parallel body of a plurality of simple parallel plate capacitors.

4.1.1 Product type: cc41 indicates i-type multilayer chip ceramic capacitors ct41 indicates ii-type multilayer chip ceramic capacitors 4.1.2 Size code: 0805 means 0.08 inches (2.03mm) in length and 0.05 inches (1.27mm) in width ), And so on; 4.1.3 Dielectric type code: Dielectric material cog (npo) x7r z5u y5v Dielectric type code cg bef 4.1.7 Terminal material: s --- all silver solderable; n --- three-layer electrode 4.1.8 Packing: t means tape packing, and empty or "b" means loose packing.

With the rapid development of the world's electronics industry, as the basic component of the electronics industry, multilayer chip ceramic capacitors are also developing at an alarming rate, increasing by 10% to 15% each year. At present, the world s demand for chip capacitors is more than 200 billion, 70% of which come from Japan, followed by Europe, America and Southeast Asia (including China). With the improvement of the reliability and integration of multilayer chip ceramic capacitors, the range of their use has become wider and wider, and they are widely used in various military and civilian electronic machines and electronic equipment. Such as computers, telephones, program-controlled switches, precision test instruments, radar communications, etc.

Capacitors have the characteristics of blocking and passing through and at the same time it is an energy storage element. Therefore, the active function in the circuit has the following aspects: 1. Energy storage exchange This is the most basic function of the capacitor, mainly through its Charge and discharge process to generate and discharge an electric energy. This is mainly based on large-capacity class II capacitors, which can even replace small aluminum electrolytic capacitors and tantalum electrolytic capacitors in some cases. 2. Because the capacitor is not a conductive body, it is a conductive body through the regular turning of the AC to reflect the charging at both ends. Therefore, it can be connected in parallel with other components in the circuit. Allows AC to pass, while DC is blocked down, acting as a bypass. In an AC circuit, the capacitor is charged and discharged following the polarity change of the input signal, so that the circuit connected to both ends of the capacitor appears to be in a conductive state and plays a coupling role. Generally speaking, the capacitor connected to the amplifier or op amp input is a coupling capacitor; the capacitor connected to the amplifier or op amp emitter is a bypass capacitor. Both are mainly class II capacitors, especially 0.1uf capacitors. 3. Frequency discrimination filtering In AC circuits, for a multi-frequency mixed signal, we can separate it with a capacitor. In general, we can use a capacitor with a reasonable capacitance to filter out most low-frequency signals. This is mainly dominated by high frequency or ultra high frequency capacitors. 4. Surge voltage suppression Because the capacitor is an energy storage element, in the circuit, it can remove those transient surge pulse signals, and it can also absorb the excess energy generated by the voltage fluctuations in the circuit. Filtering is mainly based on high-frequency products.