Patent ID: 11916030
Assignee: PANJIT INTERNATIONAL INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for manufacturing a side wettable package, the method comprising:
manufacturing a semi-finished package being attached on a carrier, wherein the semi-finished product comprises
a lead frame having a bottom surface attached to the carrier and a top surface opposite to the bottom surface;
multiple chips electrically mounted on the top surface of the lead frame; and a molding compound encapsulating the chips and the lead frame;

sawing the molding compound and the lead frame along a predetermined cutting path downward from a top surface of the molding compound to form a plurality of packages separated from each other; wherein the lead frame in each package forms a plurality of conductive pads including peripheral conductive pads distributed near a side wall of the molding compound of the package, and each peripheral conductive pads has a side surface;
over etching each of the peripheral conductive pads to form an undercut at the side surface of the peripheral conductive pad, wherein each undercut has a concave surface curved inward relative to the side wall of the molding compound and having a height equal to a thickness of the peripheral conductive pads; and
electroplating the lead frame to form a protection layer covering each of the conductive pads exposed from the bottom surface of the molding compound and the concave surface of each undercut.