Transverse hybrid LOC package
AssigneeMicron Technology, Inc.
InventorDavid J. Corisis
Life of this patent
Estimating the term…
Abstract
A hybrid semiconductor package is formed from a die having two opposed elongate die edges with conductive bond pads arranged transversely relative to the rows of outer leads. A first portion of inner leads is off-die wire bonded to some of the bond pads, and a second portion of inner leads is insulatively attached as LOC leads between the bond pads along the opposed die edges. The hybrid package results in shorter inner leads of increased pitch enabling improved line yield at wire bond and encapsulation, as well as improved electrical performance, particularly for packages with very small dice.
Claims14
A hybrid semiconductor device assembly, comprising:
- a semiconductor die including:
- an active surface thereon, the active surface having a first set of two opposing sides, each side of said first set having a length, and a second set of two opposing sides substantially normal to said first set of two opposing sides, each side of said second set of two opposing sides having a length greater than the length of each side of said first set of two opposing sides;
- a first plurality of bond pads substantially aligned on said active surface of said semiconductor die along one side of said second set of two opposing sides;
- a second plurality of bond pads substantially aligned on said active surface of said semiconductor die along the other side of said second set of two opposing sides;
- and
- a lead frame having a pair of opposed sides, each side having substantially the same length, at least one side of said pair of opposed sides including at least one lead having a first width and a lead end terminating adjacent at least one bond pad of the first plurality of bond pads on the active surface of said semiconductor die, the other side of said pair of opposed sides of said lead frame including a plurality of leads thereon, at least one lead of said plurality of leads extending over a portion of the active surface of said semiconductor die and having a second width different from said first width and a lead end terminating over said portion of the active surface, and at least one other lead of said plurality of leads having a lead end terminating adjacent at least one bond pad of the second plurality of bond pads on the active surface of said semiconductor die, said semiconductor die positioned having said second set of two opposing sides extending transversely relative to the length of the opposed sides of said lead frame.
A hybrid semiconductor device assembly, comprising:
- a semiconductor die including:
- a rectangular active surface thereon, the rectangular active surface having a first set of two opposing sides, each side of said first set of two opposing sides having a length, and a second set of two opposing sides substantially normal to said first set of two opposing sides, each side of said second set of two opposing sides having a length greater than the length of each side of said first set of two opposing sides;
- a first plurality of bond pads substantially aligned on said rectangular active surface of said semiconductor die along one side of said second set of two opposing sides;
- a second plurality of bond pads substantially aligned on said rectangular active surface of said semiconductor die along the other side of said second set of two opposing sides;
- and
- a lead frame having a pair of opposed sides and a plurality of leads, said plurality of leads comprising first, second, and third sets of leads, the first set of leads including at least one lead having a first width and a lead end terminating adjacent at least one bond pad of the first plurality of bond pads, the second set of leads including at least one lead having a second width different from said first width and a lead end terminating adjacent at least one bond pad of the second plurality of bond pads, the third set of leads including at least one lead extending over the rectangular active surface of said semiconductor die and having a third width different from said first and second widths and a lead end terminating adjacent at least one bond pad selected from a group consisting of the first plurality of bond pads and the second plurality of bond pads, said semiconductor die positioned having said second set of two opposing sides extending substantially transverse to a longitudinal length of the opposed sides of said lead frame.
An assembly of an integrated circuit lead frame and a semiconductor die having a first pair of opposed sides, each side of said first pair of opposed sides having a length, a second pair of opposed sides, each side of said second pair of opposed sides having a length greater than the length of each side of said first pair of opposed sides, and opposed rows of peripheral bond pads along at least one of said first and second pairs of opposed sides, said lead frame comprising a pair of opposed sides and a plurality of inner leads including first, second, and third sets of leads, at least one lead in said first set of leads having a width different from a width of at least one lead of the second and third sets of leads, at least one lead of said second set of leads having a width different from a width of at least one lead of the first and third sets of leads, and at least one lead from said third set of leads having a width different from a width of at least one lead from the first and second sets of leads, said semiconductor die positioned having said second pair of opposed sides extending substantially transverse to a longitudinal length of the pair of opposed sides of said lead frame.
Dependencies are inferred from the claim text.