Draft:Multi layered ceramic capacitor

• Comment: The content of this draft overlaps with content in a large section of the existing article Ceramic capacitor. The draft presented here contains no links to other Wikipedia articles, so it is unclear if any consideration has been given to integration with other articles related to this topic. Any useful additional content from this draft should be carefully added into the relevant section of the existing article. It is unclear that any new article is justified. Marshelec (talk) 03:01, 7 May 2023 (UTC)

• Comment: Compusolus is mistaken. It's perfectly clear what this draft is about, and it was clear when the draft was declined. Please replace the bare URLs with full citations. I recommend {{cite web}}. Other than that, this is ready for article space. —Anomalocaris (talk) 05:41, 30 January 2023 (UTC)

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A multi layered ceramic capacitor (MLCC) design involves the use of many thin layers of ceramic to increase the capacitance of the device. These scalable capacitors enable manufacturers to reduce overall footprint and cost. They can manufacture capacitors in various configurations such as cylinder, disc or wafer. Their design depends on the needs of the application. Multilayer ceramic capacitors are capacitors composed of multiple layers of ceramic materials. We can use this capacitor for a variety of applications including telecom, audio and video. It is also suitable for radio frequency (RF). Its electrodes can be either base metals or noble metals. The electrode material used affects the performance of the capacitor. High amounts of Palladium, for example, is often used in RF designs because it can withstand high temperatures and achieve full densification.

Ceramic capacitor types

Ceramic capacitors use a ceramic material as the dielectric. Two types of ceramic capacitors are widely used in modern electronics: multilayer ceramics (MLCCs) and ceramic discs.Compared with electrolytic capacitors, ceramic capacitors usually have a capacitance between 1 nF and 1 μF. Small capacitance and low maximum voltage rating and is polarized. MLCCs are much smaller than disc capacitors and are therefore used in surface mount devices. Ceramic capacitors are divided into two categories: Type 1 and Type 2, depending on the type of dielectric used. Type 1 ceramic capacitors use paraelectric dielectric materials such as TiO2 and perovskite titanates in the rutile phase with added Zn, Mg or Ta [9.These capacitors provide minimal capacitance change or temperature drift and stable voltage. Due to the relatively low dielectric constant (6-200) of paraelectric dielectric materials, their capacitance values ​​are in the low picofarad to microfarad range 6. Due to their low losses, they are most suitable for oscillators, filters, etc. A ceramic capacitor is a fixed value capacitor in which the ceramic material acts as the dielectric. It consists of two or more alternating layers of ceramic and metal layers used as electrodes. The composition of ceramic materials determines the electrical properties and thus the possible uses. Ceramic capacitors are divided into two application categories: Class 3 and Class 2.

Ceramic capacitor performance

Class 3 ceramic capacitors offer higher volumetric efficiency than Class 2 ceramic capacitors, but their temperature stability is not nearly as good. Capacitance over temperature has a typical performance of −22% to +56% over the range of 10 °C to 55 °C. The above application requires 250 μF input capacitance and 450 μF output capacitance. Once considering the capacitance degradation of ceramic capacitors due to overvoltage, aging and temperature, we need to derate the ceramic capacitors by about 70%. This derating means that the capacitance at the input should be about 833 μF and the capacitance at the output should be about 1500 μF. Eighteen 47 μF ceramic capacitors are required for the input and fifteen 100 μF ceramic capacitors are required for the output. By using solid capacitors, we can use two 150 μF solid capacitors at the input and one 470 μF solid capacitor at the output. Since polymer capacitors do not require derating, this saves 30% cost and 50% PCB area.