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CL21C150JBANNNC Datasheet(PDF) 30 Page - Samsung semiconductor |
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CL21C150JBANNNC Datasheet(HTML) 30 Page - Samsung semiconductor |
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30 / 35 page  Multilayer Ceramic Capacitor - General - 29 - ● Soldering Since a multilayer ceramic chip capacitor comes into direct contact with melted solder during soldering, it is exposed to potentially mechanical stress caused by the sudden temperature change. The capacitor may also be subject to silver migration, and to contamination by the flux. Because of these factors, soldering technique is critical. ▶ Soldering Methods Method Classification Reflow soldering - Overall heating - Infrared rays - Hot plate - VPS(vapor phase) - Local heating - Air heater -Laser - Light beam Flow soldering - Single wave - Double wave - * We recommend the reflow soldering method. ▶ Soldering Profile To avoid crack problem by sudden temperature change, follow the temperature profile in the adjacent graph. 300 250 200 150 100 50 ℃ preheating soldering cooling 60~120sec 10~20sec Reflow Soldering 300 250 200 150 100 50 ℃ preheating soldering cooling △ T≤150℃ 60~120sec 3~4sec Flow Soldering ▶ Manual Soldering Manual soldering can pose a great risk of creating thermal cracks in chip capacitors. The hot soldering iron tip comes into direct contact with the end terminations, and operator's carelessness may cause the tip of the soldering iron to come into direct contact with the ceramic body of the capacitor. Therefore the soldering iron must be handled carefully, and close attention must be paid to the selection of the soldering iron tip and to temperature control of the tip. |
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