Abstract: Embodiments of the present invention relate to an improved package for a bi-directional and reverse blocking battery switch. According to one embodiment, two switches are oriented side-by-side, rather than end-to-end, in a die package. This configuration reduces the total switch resistance for a given die area, often reducing the resistance enough to avoid the use of backmetal in order to meet resistance specifications. Elimination of backmetal reduces the overall cost of the die package and removes the potential failure modes associated with the manufacture of backmetal. Embodiments of the present invention may also allow for more pin connections and an increased pin pitch. This results in redundant connections for higher current connections, thereby reducing electrical and thermal resistance and minimizing the costs of manufacture or implementation of the die package.

Abstract: Embodiments of the present invention relate to forming semiconductor device package with a heat sink. In one embodiment, a subassembly comprising a die attached to a lead frame is formed, a heat sink is provided in a molding cavity, and the subassembly is coupled to the heat sink while the heat sink is in the molding cavity. In certain embodiments, a second component of the lead frame can be substituted for the heat sink. Such techniques can simplify the manufacturing process for semiconductor packages having a heat sink or lead frame with a second component.

Abstract: Embodiments of the present invention relate to the use of stamping to form features on a lead frame of a semiconductor device package. The lead frame can include a plurality of terminals with stamped features at edges of the terminals. The stamped features can include flattened portions that are thinner than other portions of the terminals and extend laterally beyond the edges of the terminals. Such stamped features can help mechanically interlock the terminals with the plastic molding of the package body. The stamped features can include patterns and/or other features that may further increase interlocking between the terminals and the package body.

Abstract: Embodiments of the present invention relate to the use of configurable lead frame fingers in a semiconductor device package. More specifically, the lead frame of a device package can include a plurality of fingers used to support and provide electrical contact to the die. The die can include a plurality of contacts that comprise a series of parallel columns located a certain distance from one another, and the fingers of the lead frame can be configured to align with the contacts. The lead frame can have multiple terminals, each with one or more fingers and pins. As such, each lead frame configuration may be utilized with different configurations of die.

Abstract: Embodiments of the present invention relate to the use of stamping to form features on a lead frame of a semiconductor device package. In one embodiment, portions of the lead frame such as pins are moved out of the horizontal plane of a diepad by stamping. In certain embodiments, indentations or a complex cross-sectional profile, such as chamfered, may be imparted to portions of the pins and/or diepad by stamping. The complexity offered by such a stamped cross-sectional profile serves to enhance mechanical interlocking of the lead frame within the plastic molding of the package body. Other techniques such as selective electroplating and/or formation of a brown oxide guard band to limit spreading of adhesive material during die attach, may be employed alone or in combination to facilitate fabrication of a package having such stamped features.

Abstract: Embodiments of the present invention relate to the use of stamping to form features on a lead frame of a semiconductor device package. In one embodiment, portions of the lead frame such as pins are moved out of the horizontal plane of a diepad by stamping. In certain embodiments, indentations or a complex cross-sectional profile, such as chamfered, may be imparted to portions of the pins and/or diepad by stamping. The complexity offered by such a stamped cross-sectional profile serves to enhance mechanical interlocking of the lead frame within the plastic molding of the package body. Other techniques such as selective electroplating and/or formation of a brown oxide guard band to limit spreading of adhesive material during die attach, may be employed alone or in combination to facilitate fabrication of a package having such stamped features.

Abstract: Embodiments of the present invention relate to an improved package for a bi-directional and reverse blocking battery switch. According to one embodiment, two switches are oriented side-by-side, rather than end-to-end, in a die package. This configuration reduces the total switch resistance for a given die area, often reducing the resistance enough to avoid the use of backmetal in order to meet resistance specifications. Elimination of backmetal reduces the overall cost of the die package and removes the potential failure modes associated with the manufacture of backmetal. Embodiments of the present invention may also allow for more pin connections and an increased pin pitch. This results in redundant connections for higher current connections, thereby reducing electrical and thermal resistance and minimizing the costs of manufacture or implementation of the die package.

Abstract: Embodiments of the present invention relate to the use of stamping to form features on a lead frame of a semiconductor device package. In one embodiment, portions of the lead frame such as pins are moved out of the horizontal plane of a diepad by stamping. In certain embodiments, indentations or a complex cross-sectional profile, such as chamfered, may be imparted to portions of the pins and/or diepad by stamping. The complexity offered by such a stamped cross-sectional profile serves to enhance mechanical interlocking of the lead frame within the plastic molding of the package body. Other techniques such as selective electroplating and/or formation of a brown oxide guard band to limit spreading of adhesive material during die attach, may be employed alone or in combination to facilitate fabrication of a package having such stamped features.

Abstract: Embodiments of the present invention relate to an improved die layout for a bi-directional and reverse blocking battery switch. According to one embodiment, two switches are oriented side-by-side, rather than end-to-end, in a die package. This configuration reduces the total switch resistance for a given die area, often reducing the resistance enough to avoid the use of backmetal in order to meet resistance specifications. Elimination of backmetal reduces the overall cost of the die package and removes the potential failure modes associated with the manufacture of backmetal. Embodiments of the present invention may also allow for more pin connections and an increased pin pitch. This results in redundant connections for higher current connections, thereby reducing electrical and thermal resistance and minimizing the costs of manufacture or implementation of the die package.

Abstract: Embodiments of the present invention relate to semiconductor device packages featuring encapsulated leadframes in electrical communication with at least one die through electrically conducting bumps or balls and electrically conducting ribbons. Embodiments of the present invention may permit multiple die and/or multiple passive devices to occupy space in the package previously consumed by the diepad. The result is a flexible packaging process allowing the combination of die and technologies required for complete sub-systems in a conventional small JEDEC specified footprint.

Abstract: Embodiments of the present invention relate to the use of stamping to form features on a lead frame of a semiconductor device package. In one embodiment, portions of the lead frame such as pins are moved out of the horizontal plane of a diepad by stamping. In certain embodiments, indentations or a complex cross-sectional profile, such as chamfered, may be imparted to portions of the pins and/or diepad by stamping. The complexity offered by such a stamped cross-sectional profile serves to enhance mechanical interlocking of the lead frame within the plastic molding of the package body. Other techniques such as selective electroplating and/or formation of a brown oxide guard band to limit spreading of adhesive material during die attach, may be employed alone or in combination to facilitate fabrication of a package having such stamped features.

Abstract: Embodiments in accordance with the present invention relate to the fabrication of packages for semiconductor devices, and in particular to the use of electroplating techniques to form features on the surface of a metal lead frame. In accordance with one embodiment, electroplating is used to fabricate non-integral pin portions shaped to remain securely encapsulated within the plastic molding of the package. In accordance with another embodiment, electroplating may be used to fabricate protrusions on the underside of the lead frame for elevating the package above the PC board, thereby preserving the rounded shape of solder balls used to secure the diepad to the PC board. In accordance with yet another embodiment, electroplating may be used to fabricate raised patterns on the upper surface of the diepad for ensuring uniform spreading of adhesive used to secure the die to the diepad, thereby ensuring level attitude of the die within the package.

Abstract: Embodiments of the present invention relate to the use of stamping to form features on a lead frame of a semiconductor device package. In one embodiment, portions of the lead frame such as pins are moved out of the horizontal plane of a diepad by stamping. In certain embodiments, indentations or a complex cross-sectional profile, such as chamfered, may be imparted to portions of the pins and/or diepad by stamping. The complexity offered by such a stamped cross-sectional profile serves to enhance mechanical interlocking of the lead frame within the plastic molding of the package body. Other techniques such as selective electroplating and/or formation of a brown oxide guard band to limit spreading of adhesive material during die attach, may be employed alone or in combination to facilitate fabrication of a package having such stamped features.

Abstract: Efficient utilization of space in a laterally-conducting semiconductor device package is enhanced by creating at least one supplemental downbond pad portion of the diepad for receiving the downbond wire from the ground contact of the device. The supplemental diepad portion may occupy area at the end or side of the package formerly occupied by non-integral leads. By receiving the substrate downbond wire, the supplemental diepad portion allows a greater area of the main diepad to be occupied by a die having a larger area, thereby enhancing space efficiency of the package.

Abstract: Embodiments of the present invention relate to the use of stamping to form features on a lead frame of a semiconductor device package. In one embodiment, portions of the lead frame such as pins are moved out of the horizontal plane of a diepad by stamping. In certain embodiments, indentations or a complex cross-sectional profile, such as chamfered, may be imparted to portions of the pins and/or diepad by stamping. The complexity offered by such a stamped cross-sectional profile serves to enhance mechanical interlocking of the lead frame within the plastic molding of the package body. Other techniques such as selective electroplating and/or formation of a brown oxide guard band to limit spreading of adhesive material during die attach, may be employed alone or in combination to facilitate fabrication of a package having such stamped features.

Abstract: Embodiments of the present invention relate to an improved die layout for a bi-directional and reverse blocking battery switch. According to one embodiment, two switches are oriented side-by-side, rather than end-to-end, in a die package. This configuration reduces the total switch resistance for a given die area, often reducing the resistance enough to avoid the use of backmetal in order to meet resistance specifications. Elimination of backmetal reduces the overall cost of the die package and removes the potential failure modes associated with the manufacture of backmetal. Embodiments of the present invention may also allow for more pin connections and an increased pin pitch. This results in redundant connections for higher current connections, thereby reducing electrical and thermal resistance and minimizing the costs of manufacture or implementation of the die package.

Abstract: Singulation of individual electronic packages fabricated as part of a common matrix, is accomplished by mask patterning and chemical exposure in combination with physical sawing. In one embodiment of a singulation process in accordance with the present invention, an initial, shallow saw cut into inter-package regions of the matrix exposes underlying metal to subsequent chemical etching steps. In an alternative embodiment, a separate photoresist mask may be patterned over the matrix to selectively expose metal in inter-package regions to chemical etching.

Abstract: Efficient utilization of space in a laterally-conducting semiconductor device package is enhanced by creating at least one supplemental downbond pad portion of the diepad for receiving the downbond wire from the ground contact of the device. The supplemental diepad portion may occupy area at the end or side of the package formerly occupied by non-integral leads. By receiving the substrate downbond wire, the supplemental diepad portion allows a greater area of the main diepad to be occupied by a die having a larger area, thereby enhancing space efficiency of the package.