C 3 ELECTROLYTIC CAPACITORS Electrolytic capacitors are more complicated than electrostatic capacitors in their construction. The function of electrolyte is to provide electric connection to the first electrode with very high surface with fine structure and thus to achieve high capacitance values. The capacitors have an anode and a cathode and thus they are polarity dependent. Between the anode and the cathode there is...
C 2.12 OTHER INORGANIC DIELECTRICS C 2.12.1 Class 3 ceramics The headlined type of ceramic capacitor are also called barrier layer capacitor. It consists of sintered granules of titanium oxides with semiconductor properties. On the surface of every granule there is created a capacitive barrier layer zone. The sum of all small capacitance elements gives a high total capacitance. The dielectric constant will be...
Silicon MIS and MOS Capacitors Silicon-based dielectrics are used within semiconductor manufacturing processes of high density electronic devices by semiconductor manufacturing processes. Silicon based dielectrics for capacitor technologies are usually based on silicon dioxide (MIS) or silicon nitride (MOS) insulating layers. Figure below describes a conventional MOS technology to make silicon capacitors. SEM image at a 70° tilt after RIE etch. Top shows remaining...
C 2.11 CERAMIC CAPACITORS CLASS 2 Ceramic Class 2 capacitors can be divided in two main groups, one with a moderate temperature dependence for the class - ΔC ≤ ±15% within the temperature range – and the other with such changes that only a fraction of the capacitance remains at the temperature limits. The first group is in our tables and diagrams represented by...
C 2.10 Ceramic Capacitors Class I Capacitors with Class 1 ceramic are manufactured with temperature coefficients between +100 and –1500 ppm/°C. In tables and diagrams we will confine ourselves to the type that is called NP0 or COG (0 ± 30 ppm/°C) and which is predominant over all remaining Class 1 variants. To the Class 1 ceramics we also count porcelain that above all...
