Patent ID: 6858933

Claim:
An injection mold for encapsulating an integrated circuit chip in an encapsulation material so as to form a semiconductor package containing the chip, said injection mold comprising: at least one injection cavity defined by a wall, the injection cavity being able to house the chip and receive the encapsulation material so as to encapsulate the chip in a block of the encapsulation material; and an insert fixedly attached so as to have a transverse surface that lies parallel to one face of the chip and a front part that forms a first portion of the wall of the injection cavity such that the encapsulation material is able to contact the transverse surface of the insert during encapsulation so that the transverse surface of the insert determines the roughness of a region of the face of the block of encapsulation material that corresponds to the transverse surface of the insert, wherein the transverse surface of the insert has a roughness that is chosen such that the face of the block of encapsulation material of the semiconductor package has a suitable roughness in the region of the face of the block of encapsulation material corresponding to the transverse surface of the insert.