A variety of footed and leadless semiconductor packages, with either exposed or isolated die pads, are described. Some of the packages have leads with highly coplanar feet that protrude from a plastic body, facilitating mounting the packages on printed circuit boards using wave-soldering techniques.

A method includes forming a leadframe assembly to have a pair of opposing sides, and having semiconductor die receiving portions extending between the opposing sides. The method also includes placing semiconductor dies on the leadframe assembly in the die receiving portions. Each die has a row of leads on each of two opposing sides of the die and a longitudinal axis parallel to the rows of leads. The longitudinal axis of each die is orthogonal to the opposing sides of the leadframe assembly. The method further includes applying mold compound to the semiconductor dies. The method includes punching through the leadframe assembly between the opposing sides using a first tool having a first tool longitudinal axis parallel to longitudinal axes of the dies.

According to the present disclosure, a method of manufacturing a semiconductor device includes the steps of (a) preparing a lead frame including a switching element die pad, a control element die pad, and a third-side side rail portion, (b) mounting a switching element and a diode element on the switching element die pad and mounting a control element configured to control the switching element on the control element die pad, (c) sealing the switching element, the diode element, and the control element with a mold resin such that the power side terminal, the control side terminal, and a part of the third-side side rail portion protrude outward, and (d) forming a third-side side rail terminal by cutting the third-side side rail portion, the third-side side rail terminal extending from a part of the third-side side rail portion.

Inner leads having die pads having upper surfaces to which semiconductor elements are mounted each have a stepped profile, and surfaces of portions of the inner leads are exposed from a sealing resin in plan view. Outer leads connected to the inner leads have first bends at side surfaces of the sealing resin to extend in a direction on a side of the upper surfaces of the die pads, so that a miniaturized semiconductor device can be obtained.

A semiconductor device includes a semiconductor chip, a connection element configured to mechanically and electrically couple the semiconductor device to a circuit board, wherein the connection element is electrically coupled to the semiconductor chip and arranged in a mounting plane of the semiconductor device, and the semiconductor chip is mounted on the connection element. The semiconductor device further includes an extension element mechanically coupled to the connection element and extending in a direction out of the mounting plane, wherein the extension element is configured for air cooling.

A semiconductor device has wettable corner leads. A semiconductor die is mounted on a lead frame. Die bonding pads are electrically connected to leads of the lead frame. The die and electrical connections are encapsulated with a mold compound. The leads are exposed and flush with the corners of the device. The leads include dimples so that they are wettable, which facilitates inspection when the device is mounted on a circuit board or substrate.

A leadframe strip includes a two-dimensional mechanically interconnected array of leadframe units including a plurality of leadframe unit pairs, the leadframe strip having an overall length and an overall width. The plurality of leadframe unit pairs each include a first leadframe design including a first plurality of tie bars and a plurality of first leads, and a second leadframe design that is different from the first leadframe design including a second plurality of tie bars, and a plurality of second leads. The first plurality of tie bars and the second plurality of tie bars are configured together to provide a plurality of continuous metal support networks that span an entirety of the overall length or the overall width.

An integrated circuit package includes a die attach pad and a plurality of conductors formed from a lead frame material. A cavity is formed in a top surface of the die attach pad. A die attach adhesive is disposed within the cavity. A top surface of the die attach adhesive is flush with the top surface of the die attach pad. A semiconductor die is mounted on the die attach pad using the die attach adhesive. The semiconductor die is electrically connected to the plurality of conductors through a set of bond wires. A bottom surface of the semiconductor die is coplanar with the top surface of the die attach pad. A molding compound covers portions of the lead frame, the semiconductor die, and the set of bond wires.

A packaged electronic device includes a package structure with opposite first and second sides spaced apart from one another along a first direction, and opposite third and fourth sides spaced apart from one another along a second direction, as well as first and second leads. The first lead includes a first portion that extends outward from the third side of the package structure and extends downward toward a plane of the first side and away from a plane of the second side. The second lead includes a first portion that extends outward from the third side of the package structure, and the second lead extends upward toward the plane of the second side and away from the plane of the first side to allow connection to another circuit or component, such as a second packaged electronic device, a passive circuit component, a printed circuit board, etc.

Implementations of semiconductor packages may include: a first semiconductor die having a plurality of balls coupled to a first side thereof, a second semiconductor die, a lead frame having a die attach area on a first side of the lead frame, the die attach area containing an opening therethrough and one or more wire bonds. The first semiconductor die may be coupled to a backside of the second semiconductor die by an adhesive on a second side of the first semiconductor die opposing the first side. The second semiconductor die may be mechanically and electrically coupled to the lead frame through one or more wire bonds at the die attach area. The first semiconductor die may be positioned within the opening in the center of the lead frame.