Abstract:
A method is disclosed for attaching an interconnection plate to semiconductor die within leadframe package. A base leadframe is provided with die pad for attaching semiconductor die. An interconnection plate is provided for attachment to the base leadframe and semiconductor die. Add a base registration feature onto base leadframe and a plate registration feature onto interconnection plate with the registration features designed to match each other such that, upon approach of the interconnection plate to base leadframe, the two registration features would engage and guide each other causing concomitant self-aligned attachment of the interconnection plate to base leadframe. Next, the interconnection plate is brought into close approach to base leadframe to engage and lock plate registration feature to base registration feature hence completing attachment of the interconnection plate to semiconductor die and forming a leadframe package.
Abstract:
A bottom source power metal-oxide-semiconductor field-effect transistor (MOSFET) device includes a gate electrode and a source electrode formed on an initial insulation layer on a first surface of a semiconductor chip and a drain electrode formed on a second surface of the semiconductor chip. The source electrode includes a source metal, a source electrode bump formed on the source metal and a source electrode metal layer on top of the source electrode bump. A first insulation layer covers the gate electrode. A through via aligned to the gate electrode is formed from the second surface of the chip to expose a portion of the gate electrode from the second surface.
Abstract:
A combined packaged power semiconductor device includes a flipped top source low-side MOSFET electrically connected to a top surface of a die paddle, a first metal interconnection plate connecting between a bottom drain of a high-side MOSFET or a top source of a flipped high-side MOSFET to a bottom drain of the low-side MOSFET, and a second metal interconnection plate stacked on top of the high-side MOSFET chip. The high-side, low-side MOSFET and the IC controller can be packaged three-dimensionally that reduces the overall size of semiconductor devices and can maximize the chip's size within a package of the same size and improves the performance of the semiconductor devices. The top source of flipped low-side MOSFET is connected to the top surface of the die paddle and thus is grounded through the exposed bottom surface of die paddle, which simplifies the shape of exposed bottom surface of the die paddle and maximizes the area to facilitate heat dissipation.
Abstract:
A method of making a chip-exposed semiconductor package comprising the steps of: plating a plurality of electrode on a front face of each chi on a wafer; grinding a backside of the wafer and depositing a back metal then separating each chips; mounting the chips with the plating electrodes adhering onto a front face of a plurality of paddle of a leadframe; adhering a tape on the back metal and encapsulating with a molding compound; removing the tape and sawing through the leadframe and the molding compound to form a plurality of packaged semiconductor devices.
Abstract:
The present invention is directed to a lead-frame having a stack of semiconductor dies with interposed metalized clip structure. Level projections extend from the clip structure to ensure that the clip structure remains level during fabrication.
Abstract:
A semiconductor package with connecting plate for internal connection comprise: a plurality of chips each having a plurality of contact areas on a top surface; one or more connecting plates having a plurality of electrically isolated connecting plate portions each connecting a contact area of the semiconductor chips. The method of making the semiconductor package includes the steps of connecting one or more connecting plates to a plurality of semiconductor chips, applying a molding material to encapsulate the chips and the connecting plates, separating a plurality of connecting plate portions of the connecting plates by shallow cutting through or by grinding.
Abstract:
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.
Abstract:
This invention discloses a process for packaging semiconductor device with external leads. The process includes comprises Step 1: providing a lead frame comprising a plurality of lead frame units connected by a plurality of metal beams, each lead frame unit comprising a die pad and a plurality of leads located on opposite sides of the die pad; adhering a semiconductor chip onto each of the die pad, and providing a plurality of metal connections for electrically connecting each chip to its corresponding leads; Step 2 providing a plastic molding material to enclose the plurality of the lead frame units, the metal beams, the chips, and at least portions of the metal connections; Step 3 removing a portion of the plastic molding material above the metal beams to expose the metal beams and portions of the leads in connection with the metal beams; and Step 4 separating each lead frame unit, forming a plurality of individual semiconductor plastic package components with external leads.
Abstract:
A method is disclosed for attaching an interconnection plate to semiconductor die within leadframe package. A base leadframe is provided with die pad for attaching semiconductor die. An interconnection plate is provided for attachment to the base leadframe and semiconductor die. Add a base registration feature onto base leadframe and a plate registration feature onto interconnection plate with the registration features designed to match each other such that, upon approach of the interconnection plate to base leadframe, the two registration features would engage and guide each other causing concomitant self-aligned attachment of the interconnection plate to base leadframe. Next, the interconnection plate is brought into close approach to base leadframe to engage and lock plate registration feature to base registration feature hence completing attachment of the interconnection plate to semiconductor die and forming a leadframe package.
Abstract:
A combined packaged power semiconductor device includes flipped top source low-side MOSFET electrically connected to top surface of a die paddle, first metal interconnection plate connecting between bottom drain of a high-side MOSFET or top source of a flipped high-side MOSFET to bottom drain of the low-side MOSFET, and second metal interconnection plate stacked on top of the high-side MOSFET chip. The high-side, low-side MOSFET and the IC controller can be packaged three-dimensionally reducing the overall size of semiconductor devices and can maximize the chip's size within a package of the same size and improves the performance of the semiconductor devices. The top source of flipped low-side MOSFET is connected to the top surface of the die paddle and thus is grounded through the exposed bottom surface of die paddle, which simplifies the shape of exposed bottom surface of the die paddle and maximizes the area to facilitate heat dissipation.