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US 6,724,070 B2Granted
Fine pitch lead frame
AssigneeTexas Instruments Incorporated
InventorsRobert M. Fritzsche, Donald C. Abbott
Life of this patent
Estimating the term…
Abstract
A lead frame including a first set of leads in a first plane and a second set of leads in a second plane offset vertically from the second plane. The leads in the first and second planes are offset from each other by a lead width.
Claims4
A lead frame, comprising:
- sheet metal having top and bottom opposing surfaces;
- a first set of leads formed in said sheet metal by etching a pattern into said top surface, each of said leads having a width dimension and each of said leads spaced from one another by a distance approximately the same as said width dimension, said leads having a thickness less than half of the distance between said top and bottom opposing surfaces;
- a second set of leads formed in said sheet metal by etching a pattern into said bottom surface, each of said leads having said width dimension and each of said leads spaced from one another by a distance approximately the same as said width dimension, said leads having a thickness less than half of the distance between said top and bottom opposing surfaces;
- wherein said second set of leads is offset from said first set of leads in a plane parallel to said top and bottom surfaces by a distance approximately equal to said width dimension;
- and
- further wherein said first and second sets of leads are separated from one another in a plane perpendicular to said top and bottom surfaces.
3 more elements
A lead frame, comprising:
- sheet metal having parallel top and bottom opposing surfaces:
- a first set of leads in said sheet metal in a plane parallel to said top and bottom opposing surfaces;
- a second set of leads in said sheet metal in a plane parallel to said top and bottom opposing surfaces;
- wherein said first and second sets of leads are separated from one another in a plane perpendicular to said top and bottom surfaces, and further wherein both said first and second sets of leads lie completely within said top and bottom opposing surfaces of said sheet metal.
1 more element
Dependencies are inferred from the claim text.