Packaging of Roll-type Electrolytic Capacitor Elements
摘要:
This invention describes a packaging structure for roll-type (wound-type) aluminum conductive polymer capacitor element. Two protective substrates are applied to sandwich a roll-type capacitor element in between with an insulating material surrounding the capacitor element also in between the protective substrates. The protective substrates comprise electrically separated anodic conductive pad and cathodic conductive pad on their surfaces. The capacitor element is oriented with its axis perpendicular to the two substrates. The anodic and cathodic leads of the capacitor element pass through the through holes. An anodic external terminal is plated over the anodic conductive pad and a cathodic external terminal is plated over the cathodic conductive pad so that the anodic external terminal is electrically connected to the anodic lead and the cathodic external terminal is electrically connected to the cathodic lead. In another arrangement, the anodic and cathodic leads are bent by about 90 degree so that they point to the two sides of the packaging. External terminals are placed on the two sides of the packaging on the surfaces of the insulating material. In still another arrangement, the packaging structure uses only one protective substrate.
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