Semiconductor device including leadframe having power bars and increased I/O
First Claim
1. A leadframe for a semiconductor package, comprising:
- a generally planar die pad defining multiple peripheral edge segments;
a land connecting bar attached to and at least partially circumventing the die pad;
a dambar attached to and at least partially circumventing the land connecting bar;
a plurality of first leads integrally connected to the land connecting bar and extending inwardly toward the die pad;
a plurality of second leads integrally connected to the dambar, each of the second leads having an inner portion which extends inwardly from the dambar toward the land connecting bar, and an outer portion which extends outwardly from the dambar; and
at least one power bar integrally connected to the land connecting bar and extending between the land connecting bar and the inner portions of at least some of the second leads.
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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 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 bottom surface portions which, in the completed semiconductor package, are exposed and at least partially circumvent the die pad, with other leads including portions which protrude from respective side surfaces of a package body in the completed semiconductor package. The semiconductor package also includes one or more power bars and/or one or more ground rings which are integral portions of the original leadframe used to fabricate the same.
384 Citations
21 Claims
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1. A leadframe for a semiconductor package, comprising:
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a generally planar die pad defining multiple peripheral edge segments; a land connecting bar attached to and at least partially circumventing the die pad; a dambar attached to and at least partially circumventing the land connecting bar; a plurality of first leads integrally connected to the land connecting bar and extending inwardly toward the die pad; a plurality of second leads integrally connected to the dambar, each of the second leads having an inner portion which extends inwardly from the dambar toward the land connecting bar, and an outer portion which extends outwardly from the dambar; and at least one power bar integrally connected to the land connecting bar and extending between the land connecting bar and the inner portions of at least some of the second leads. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A leadframe for a semiconductor package, comprising:
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a generally planar die pad defining multiple peripheral edge segments; a land connecting bar attached to and at least partially circumventing the die pad; a dambar attached to and at least partially circumventing the land connecting bar; a plurality of first leads integrally connected to the land connecting bar and extending inwardly toward the die pad; a plurality of second leads integrally connected to the dambar, each of the second leads having an inner portion which extends inwardly from the dambar toward the land connecting bar, and an outer portion which extends outwardly from the dambar; and at least one power bar having a first end integrally connected to one of the land connecting bar and one the first leads, and a second end integrally connected to one of the first leads, the power bar extending between the land connecting bar and the die pad. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A leadframe for a semiconductor package, comprising:
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a generally planar die pad defining multiple peripheral edge segments; a plurality of land connecting bars at least partially circumventing the die pad; a dambar at least partially circumventing the land connecting bars; a plurality of first leads integrally connected to each of the land connecting bars and extending inwardly toward the die pad; a plurality of second leads integrally connected to the dambar, each of the second leads having an inner portion which extends inwardly from the dambar toward a respective one of the land connecting bars, and an outer portion which extends outwardly from the dambar; and at least one primary power bar integrally connected to at least one of the land connecting bars and extending between at least one of the land connecting bars and the inner portions of at least some of the second leads. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification