One end of the patch tantalum capacitor is marked with a horizontal line, which is the positive electrode of the patch tantalum capacitor, and the other end is the negative electrode. Lead-tantalum capacitors have a positive electrode at the long leg and a negative electrode at the short leg. Patch tantalum capacitors are polar capacitors, and the positive and negative poles cannot be reversed. If the connection is reversed, the tantalum capacitor will not work or fail.