Slot structure for component and PCB (printed circuit board)

The invention discloses a slot structure for a component and a PCB (printed circuit board). The slot structure comprises a stepped slot and an electroplated layer. The stepped slot is used for accommodating the component, the lower portion of the inner wall of the stepped slot is wider than the upper portion of the inner wall of the stepped slot, the joint between the upper portion and the lower portion of the inner wall of the stepped slot is lower than a top metal layer of the PCB and is not lower than a second metal layer of the PCB, the electroplated layer clings to parts, except for the upper portion of the stepped slot, of the inner wall of the stepped slot, and the component is electrically connected with the second metal layer by the electroplated layer. The slot structure for the component is arranged on the PCB. The slot structure and the PCB have the advantages that the lower portion of the inner wall of the stepped slot for accommodating the component is wider than the upper portion of the inner wall of the stepped slot, so that soldering tin accommodating space of the lower portion of the inner wall of the stepped slot is large, the climbing height of soldering tin along the inner wall of the stepped slot is reduced, and short circuit between the component and the top metal layer is prevented; the quantity of hollowed-out media between the top metal layer and the second metal layer of the PCB is low, so that decrease of an effective dielectric constant of the PCB is not obvious, and influence on the impedance of an output end of the component is low.