Patent ID: 9659843
Date: 2017-05-23
CPC Classifications: B29C,H01L

Claim:
1. A method of processing a lead frame strip having a plurality of unit lead frames, each of the unit lead frames having a periphery structure connecting adjacent ones of the unit lead frames, a die paddle inside of the periphery structure, a plurality of leads connected to the periphery structure and extending towards the die paddle, and a molding compound channel in the periphery structure configured to guide liquefied molding material, the method comprising: attaching a semiconductor die to each of the die paddles; electrically connecting the semiconductor dies to the leads; and forming a liquefied molding compound on each of the unit lead frames such that the liquefied molding compound encapsulates the semiconductor dies and flows into the molding compound channels thereby forming molding extensions that extend onto the periphery structures, wherein forming the liquefied molding compound comprises a transfer molding process in which the liquefied molding compound enters a mold cavity and fills the molding compound channels, wherein molding compound channels are formed in tabs of the periphery structure, the tabs extending towards the die paddle, and wherein the transfer molding process comprises providing the mold cavity over each of the unit lead frames such that the mold cavity directly adjoins molding compound channels.