摘要:
The invention relates to a semiconductor package of a flip chip and a method for making the semiconductor package. The semiconductor chip comprises a metal-oxide-semiconductor field effect transistor. On a die paddle including a first base, a second base and a third base, half-etching or punching is performed on the top surfaces of the first base and the second base to obtain plurality of grooves that divide the top surface of the first base into a plurality of areas comprising multiple first connecting areas, and divide the top surface of the second base into a plurality of areas comprising at least a second connecting area. The semiconductor chip is connected to the die paddle at the first connecting areas and the second connecting area.
摘要:
The invention relates to a semiconductor package of a flip chip and a method for making the semiconductor package. The semiconductor chip comprises a metal-oxide-semiconductor field effect transistor. On a die paddle including a first base, a second base and a third base, half-etching or punching is performed on the top surfaces of the first base and the second base to obtain plurality of grooves that divide the top surface of the first base into a plurality of areas comprising multiple first connecting areas, and divide the top surface of the second base into a plurality of areas comprising at least a second connecting area. The semiconductor chip is connected to the die paddle at the first connecting areas and the second connecting area.
摘要:
A preparation method for a power semiconductor device includes: providing a lead frame containing a plurality of chip mounting units, one side edge of a die paddle of each chip mounting unit is bent and extended upwardly and one lead connects to the bent side edge of the die paddle and extends in an opposite direction from the die paddle; attaching a semiconductor chip to the top surface of the die paddle; forming metal bumps on each electrode at the front of the semiconductor chip with a top end of each metal bump protruding out of a plane of the top surface of the lead; heating the metal bump and pressing a top end of each metal bump by a pressing plate forming a flat top end surface that is flush with the top surface of the lead; and cutting the lead frame to separate individual chip mounting units.
摘要:
A substrate-less composite power semiconductor device may include a thin substrate and a top metal layer located on a top surface of the substrate. A total thickness of the substrate and the epitaxial layer may be less than 25 microns. Solder bumps are formed on top of the top metal layer and molding compound surrounds the solder bumps and leaves the solder bumps at least partly exposed.
摘要:
A virtually substrate-less composite power semiconductor device (VSLCPSD) and method are disclosed. The VSLCPSD has a power semiconductor device (PSD), a front-face device carrier (FDC) made out of a carrier material and an intervening bonding layer (IBL). Both carrier and IBL material can be conductive or non-conductive. The PSD has back substrate portion, front semiconductor device portion with patterned front-face device metallization pads and a virtually diminishing thickness TPSD. The FDC has patterned back-face carrier metallizations contacting the front-face device metallization pads, patterned front-face carrier metallization pads and numerous parallelly connected through-carrier conductive vias respectively connecting the back-face carrier metallizations to the front-face carrier metallization pads. The FDC thickness TFDC is large enough to provide structural rigidity to the VSLCPSD. The diminishing thickness TPSD effects a low back substrate resistance and the through-carrier conductive vias effect a low front-face contact resistance to the front-face device metallization pads.
摘要:
A semiconductor package and it manufacturing method includes a lead frame having a die pad, and a source lead with substantially a V groove disposed on a top surface. A semiconductor chip disposed on the die pad. A metal plate connected to a top surface electrode of the chip having a bent extension terminated in the V groove in contact with at least one of the V groove sidewalls.
摘要:
The present invention features a lead-frame package, having a first, second, third and fourth electrically conductive structures with a pair of semiconductor dies disposed therebetween defining a stacked structure. The first and second structures are spaced-apart from and in superimposition with the first structure. A semiconductor die is disposed between the first and second structures. The semiconductor die has contacts electrically connected to the first and second structures. A part of the third structure lies in a common plane with a portion of the second structure. The third structure is coupled to the semiconductor die. An additional semiconductor die is attached to one of the first and second structures. The fourth structure is in electrical contact with the additional semiconductor die. A molding compound is disposed to encapsulate a portion of said package with a sub-portion of the molding compound being disposed in the volume.
摘要:
A WLCSP method comprises: depositing a metal bump on bonding pads of chips; forming a first packaging layer at front surface of wafer to cover metal bumps while forming an un-covered ring at the edge of wafer to expose the ends of each scribe line located between two adjacent chips; thinning first packaging layer to expose metal bumps; forming a groove on front surface of first packaging layer along each scribe line by cutting along a straight line extended by two ends of scribe line exposed on front surface of un-covered ring; grinding back surface of wafer to form a recessed space and a support ring at the edge of the wafer; depositing a metal layer at bottom surface of wafer in recessed space; cutting off the edge portion of wafer; and separating individual chips from wafer by cutting through first packaging layer, the wafer and metal layer along groove.
摘要:
The invention generally relates to a packaging method of an ultra-thin chip, more specifically, the invention relates to a method for packaging the ultra-thin chip with solder ball thermo-compression in wafer level packaging process. The method starts with disposing solder balls on metal pads arranged on the front surface of semiconductor chips that are formed at the front surface of a semiconductor wafer. The solder balls are soften by heating the wafer, a compression plate is applied with a pressure on the top ends of the solder balls thus forming a co-planar top surface at the top ends of the solder balls. A molding compound is deposited on the front surface of the wafer with the top ends of the solder balls exposed. The wafer is then ground from its back surface to reduce its thickness to achieve ultra-thin chip.
摘要:
This invention discloses an electronic package for containing a vertical semiconductor chip that includes a laminated board having a via connector and conductive traces distributed on multiple layers of the laminated board connected to the via connector. The semiconductor chip having at least one electrode connected to the conductive traces for electrically connected to the conductive traces at a different layer on the laminated board and the via connector dissipating heat generated from the vertical semiconductor. A ball grid array (BGA) connected to the via connector functioning as contact at a bottom surface of the package for mounting on electrical terminals disposed on a printed circuit board (PCB) wherein the laminated board having a thermal expansion coefficient in substantially a same range the PCB whereby the BGA having a reliable electrical contact with the electrical terminals.