Patent ID: 6989296

Claim:
A fabrication method of a semiconductor package with a photosensitive chip comprising the steps of: preparing a substrate plate comprising an array of substrates, the substrate plate having a core with a plurality of conductive traces formed on at least one surface of the core, each of the conductive traces having a terminal; preparing an interposer comprising an adhesive member and a plate attached onto the adhesive member, and mounting the interposer on each of the substrates via the adhesive member, with a peripheral portion on each of the substrates exposed from the interposer; performing a molding process using an upper mold and a bottom mold, and clamping the substrate plate between the upper and lower molds, wherein the upper mold has a cavity for receiving the interposers mounted on the substrates, such that the interposers are interposed between the upper mold and the substrates, and the plates of the interposers are in contact with an inner wall of the cavity; and injecting a resin compound into the cavity to fill the cavity and form an encapsulation body on the substrate plate, the encapsulation body comprising a plurality of interconnected dams each on the peripheral portion of each of the substrates; removing the upper and lower molds and the interposers from the substrate plate to expose area covered by the interposer on each of the substrates, such that the dam encompasses a space on the exposed area of the corresponding substrate; mounting at least one photosensitive chip on the exposed area of each of the substrates and in the space encompassed by each of the dams, and electrically connecting the chip to the terminals of the conductive traces; attaching a lid to the encapsulation body to seal all the spaces encompassed by the dams on the substrates; and cutting through the lid, the interconnected dams and the substrate plate to separate apart the substrates.