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 semiconductor device comprises an aluminum alloy lead-frame with a passivation layer covering an exposed portion of the aluminum alloy lead-frame. Since aluminum alloy is a low-cost material, and its hardness and flexibility are suitable for deformation process, such as punching, bending, molding and the like, aluminum alloy lead frame is suitable for mass production; furthermore, since its weight is much lower than copper or iron-nickel material, aluminum alloy lead frame is very convenient for the production of semiconductor devices.
Abstract:
A method to provide a wafer level package with increasing contact pad area comprising the steps of forming a first packaging layer on wafer top surface, grinding the wafer back surface and etch through holes, depositing a metal to fill the through holes and covering wafer backside, cutting through the wafer from wafer backside forming a plurality of grooves separating each chip then depositing a second packaging layer filling the grooves and covering the wafer back metal, reducing the first packaging layer thickness to expose the second packaging layer filling the grooves and forming a plurality of contact pads overlaying the first packaging layer thereafter cutting through the second packaging layer in the grooves to form individual package.
Abstract:
A semiconductor device comprises an aluminum alloy lead-frame with a passivation layer covering an exposed portion of the aluminum alloy lead-frame. Since aluminum alloy is a low-cost material, and its hardness and flexibility are suitable for deformation process, such as punching, bending, molding and the like, aluminum alloy lead frame is suitable for mass production; furthermore, since its weight is much lower than copper or iron-nickel material, aluminum alloy lead frame is very convenient for the production of semiconductor devices.
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 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.
Abstract:
A power semiconductor package has an ultra thin chip with front side molding to reduce substrate resistance; a lead frame unit with grooves located on both side leads provides precise positioning for connecting numerous bridge-shaped metal clips to the front side of the side leads. The bridge-shaped metal clips are provided with bridge structure and half or fully etched through holes for relieving superfluous solder during manufacturing process.
Abstract:
The present invention discloses a stacked dual MOSFET package structure and a preparation method thereof. The stacked dual MOSFET package structure comprises a lead frame unit having a die paddle, a first lead and a second lead; a first chip flipped and attached on a top surface of a main paddle of the die paddle; a second chip attached on a bottom surface of the main paddle; and a metal clip mounted on the back of the flipped first chip and electrically connecting an electrode at the back of the first chip to the first lead. A top surface of a metal bump arranged on each electrode at the front of the second chip, a bottom surface of the die pin of the die paddle, a bottom surface of a lead pin of the second lead, and a bottom surface of the first lead are located on the same plane.
Abstract:
A stacked power semiconductor device includes vertical metal oxide semiconductor field-effect transistors and dual lead frames packaged with flip-chip technology. In the method of manufacturing the stacked power semiconductor device, a first semiconductor chip is flip chip mounted on the first lead frame. A mounting clips is connected to the electrode at back side of the first semiconductor chip. A second semiconductor chip is mounted on the second lead frame, which is then flipped and stacked on the mounting clip.
Abstract:
A semiconductor device, a method of manufacturing semiconductor devices and a circuit package assembly are described. A semiconductor device can have a semiconductor substrate with first and second surfaces and a sidewall between them. First and second conductive pads on the first and second surfaces are in electrical contact with corresponding first and second semiconductor device structures in the substrate. An insulator layer on the first surface and sidewall covers a portion of the first conductive pad on the first surface. An electrically conductive layer on part of the insulator layer on the first conductive pad and sidewall is in electrical contact with the second conductive pad. The insulator layer prevents the conductive layer from making electrical contact between the first and second conductive pads.