Patent ID: 6451629
Filing Date: 2002-09-17
Classification: H01L

Abstract:
A method of encapsulating a leadframe having a die paddle adapted to receive a die and a plurality of lead fingers, the method comprising:forming an offset in the leadframe; positioning the leadframe in a mold such that the offset is immediately adjacent an injection port through which encapsulating compound is to be injected into the mold; injecting encapsulating compound into the mold such that the injected encapsulating compound interacts with the offset thereby increases the pressure differential between a first and a second surface of the leadframe so as to increase the amount of encapsulating compound flowing between the first and the second surface of the leadframe via the spaces between the lead fingers; wherein forming an offset in the leadframe comprises forming an indentation in the leadframe so that the indentation is offset from a plane of the leadframe defined by a surface of a plurality of leadfingers, wherein forming the indentation comprises forming a downset and wherein positioning the leadframe in a mold comprises positioning the leadframe in a mold having a bottom gated injection port.