00:00:00.120 [Music] 00:00:00.57900:00:00.589 ceramic capacitors are the most common 00:00:03.02000:00:03.030 capacitor in electronics they are found 00:00:05.53900:00:05.549 in devices ranging from smartphones to 00:00:07.70000:00:07.710 Internet routers to electric vehicles to 00:00:10.07000:00:10.080 satellites ceramics come in a variety of 00:00:12.58900:00:12.599 package styles but all have a similar 00:00:14.53900:00:14.549 construction multi-layer ceramic 00:00:16.51900:00:16.529 capacitors or mlcc's are alternating 00:00:19.91000:00:19.920 layers of ceramic dielectric and 00:00:21.76900:00:21.779 metallic electrodes that are 00:00:23.45000:00:23.460 interconnected by an outer termination 00:00:25.73000:00:25.740 the most common dielectric material is 00:00:28.18900:00:28.199 barium titanate some like Cabot's see 00:00:31.51900:00:31.529 zero-g use calcium circa nate commercial 00:00:34.97000:00:34.980 and automotive grade capacitors use 00:00:36.86000:00:36.870 nickel while high reliability 00:00:38.41000:00:38.420 applications may use palladium silver or 00:00:41.27000:00:41.280 nickel vme for their electrodes a single 00:00:44.75000:00:44.760 ceramic capacitor layer has a relatively 00:00:46.91000:00:46.920 small capacitance adding the multiple 00:00:49.70000:00:49.710 layers in parallel give these capacitors 00:00:51.74000:00:51.750 high capacitance and low ESR mlcc's 00:00:55.54900:00:55.559 start as fine powders mixed with binding 00:00:58.18900:00:58.199 agents into a slip the slip is dispersed 00:01:01.27900:01:01.289 as a thin layer onto a plastic carrier 00:01:03.61900:01:03.629 film the film provides mechanical 00:01:05.69000:01:05.700 strength and flexibility for handling 00:01:08.03000:01:08.040 the electrode is screen printed on the 00:01:10.55000:01:10.560 ceramic sheet using a metallic paste the 00:01:13.49000:01:13.500 pattern varies based on the finished 00:01:15.28900:01:15.299 capacitors design case size and target 00:01:18.02000:01:18.030 capacitance alternating electrode layers 00:01:20.81000:01:20.820 are stacked with blank layers and 00:01:22.70000:01:22.710 pressed into a pad individual capacitor 00:01:25.60900:01:25.619 chips diced from the pad create green or 00:01:28.34000:01:28.350 unfired chips firing the green chips in 00:01:31.91000:01:31.920 a very high temperature kiln centers the 00:01:34.34000:01:34.350 ceramic material during this process the 00:01:37.31000:01:37.320 volume of the green chips may reduce up 00:01:39.59000:01:39.600 to 30% 00:01:41.19000:01:41.200 the corner rounding process provides two 00:01:43.44000:01:43.450 benefits first it smooths out rough 00:01:45.87000:01:45.880 edges to decrease the risk of physical 00:01:47.73000:01:47.740 damage second it makes connections to 00:01:50.78900:01:50.799 the electrodes possible the termination 00:01:53.46000:01:53.470 layer is centered to connect internal 00:01:55.56000:01:55.570 electrodes and provide a suitable 00:01:57.53900:01:57.549 surface for external connection final 00:02:00.57000:02:00.580 terminations are electroplated leaving a 00:02:03.09000:02:03.100 thin layer of nickel and tin during 00:02:05.94000:02:05.950 testing a sample of mlcc's undergo 00:02:09.18000:02:09.190 physical measurement visual check and 00:02:11.49000:02:11.500 100% electrical screening electrical 00:02:15.00000:02:15.010 inspection sorts mlcc's by capacitance 00:02:17.82000:02:17.830 and tolerance dissipation factor 00:02:20.80900:02:20.819 dielectric withstanding voltage an 00:02:23.30000:02:23.310 insulation resistance are all verified 00:02:26.34000:02:26.350 to be within catalog specifications 00:02:28.58000:02:28.590 finally capacitors are inserted into 00:02:31.41000:02:31.420 carrier type and packaged into reels for 00:02:34.11000:02:34.120 shipment to customers Kemet ships tens 00:02:37.05000:02:37.060 of billions of capacitors a year many of 00:02:39.47900:02:39.489 which are mlcc's learn more about the 00:02:42.87000:02:42.880 different types of styles packaging 00:02:44.72900:02:44.739 voltages and capacitance available at 00:02:48.74000:02:48.750 wkyt.com slash making capacitors
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