Increased I/O leadframe and semiconductor device including same
First Claim
1. A semiconductor package, comprising:
- a generally planar die pad residing on a first plane;
a plurality of land leads at least partially circumventing the die pad, each of the land leads residing on the first plane;
a plurality of support bars connected to and extending generally perpendicularly from multiple peripheral edge segments of the die pad, each of the support bars extending at least partially between a respective adjacent pair of the land leads;
a plurality of peripheral leads at least partially circumventing the land leads, each of the peripheral leads at least partially residing on a second plane which extends in spaced, generally parallel relation to the first plane;
a semiconductor die attached to the die pad and electrically connected to at least some of the land and peripheral leads; and
a package body defining a bottom surface and a side surface, the package body at least partially encapsulating the die pad, the land and peripheral leads, and the semiconductor die such that portions of the land leads are exposed in the bottom surface of the package body, and portions of the peripheral leads protrude from the side surface thereof.
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Accused Products
Abstract
In accordance with the present invention, there is provided a semiconductor package (e.g., a QFP package) including a uniquely configured leadframe sized and configured to maximize the available number of exposed leads in the semiconductor package. More particularly, the semiconductor package of the present invention includes a generally planar die pad or die paddle defining multiple peripheral edge segments. In addition, the semiconductor package includes a plurality of leads. Some of these leads include exposed bottom surface portions which are provided in at least two concentric rows or rings which at least partially circumvent the die pad, with other leads including portions which protrude from respective side surfaces of a package body of the semiconductor package. Connected to the top surface of the die pad is at least one semiconductor die which is electrically connected to at least some of the leads. At least portions of the die pad, the leads, and the semiconductor die are encapsulated by the package body, with at least portions of the bottom surfaces of the die paddle and some of the leads being exposed in a common exterior surface of the package body.
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Citations
20 Claims
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1. A semiconductor package, comprising:
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a generally planar die pad residing on a first plane; a plurality of land leads at least partially circumventing the die pad, each of the land leads residing on the first plane; a plurality of support bars connected to and extending generally perpendicularly from multiple peripheral edge segments of the die pad, each of the support bars extending at least partially between a respective adjacent pair of the land leads; a plurality of peripheral leads at least partially circumventing the land leads, each of the peripheral leads at least partially residing on a second plane which extends in spaced, generally parallel relation to the first plane; a semiconductor die attached to the die pad and electrically connected to at least some of the land and peripheral leads; and a package body defining a bottom surface and a side surface, the package body at least partially encapsulating the die pad, the land and peripheral leads, and the semiconductor die such that portions of the land leads are exposed in the bottom surface of the package body, and portions of the peripheral leads protrude from the side surface thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A semiconductor package, comprising:
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a generally quadrangular die pad defining multiple peripheral edge segments; a plurality of land leads segregated into at least four sets which each extend along respective ones of the peripheral edge segments of the die pad; a plurality a support bars connected to and extending from the die pad, at least one of the support bars extending generally perpendicularly from each of the peripheral edge segments of the die pad and between an adjacent pair of the land leads of a corresponding set thereof; a plurality of peripheral leads segregated into at least four sets which each extend along respective ones of the four sets of the land leads; a semiconductor die attached to the die pad and electrically connected to at least some of the land and peripheral leads; and a package body defining a bottom surface and a side surface, the package body at least partially encapsulating the die pad, the land and peripheral leads, and the semiconductor die such that portions of the land leads are exposed in the bottom surface of the package body, and portions of the peripheral leads protrude from the side surface thereof. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A semiconductor package, comprising:
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a generally planar die pad; a plurality of land leads at least partially circumventing the die pad; a plurality a support bars connected to and extending from the die pad, each of the support bars extending at least partially between a respective adjacent pair of the land leads; a plurality of peripheral leads at least partially circumventing the land leads; a semiconductor die attached to the die pad and electrically connected to at least some of the land and peripheral leads; and a package body defining a bottom surface and a side surface, the package body at least partially encapsulating the die pad, the land and peripheral leads, and the semiconductor die such that portions of the land leads are exposed in the bottom surface of the package body, and portions of the peripheral leads protrude from the side surface thereof, wherein each of the plurality of support bars include half-etched portions that define bottom surfaces encapsulated by the package body.
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Specification