Multi-sheet conductive substrates for microelectronic devices and methods for forming such substrates
AssigneeTessera, Inc.
InventorsMasud Beroz, Belgacem Haba
Life of this patent
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Abstract
A substrate is provided having a plurality of sheets. Each sheet has a first major surface containing a plurality of electrically conductive regions and a second major surface that opposes the first major surface. The sheets are arranged such that the first major surface of a sheet faces the second major surface of another. At least one electrically conductive region of each sheet is partially or fully exposed. At least one electrically conductive region of a sheet is partially or fully covered, e.g., by one or more electrically conductive regions of another sheet. A method for forming such a substrate is also provided.
Claims35
A substrate for packaging a microelectronic device, comprising first and second sheets, each sheet having opposing first and second major surfaces, each first surface containing a plurality of electrically conductive regions,
- wherein the sheets are arranged such that the second major surface of the first sheet faces the first major surface of the second sheet, at least one electrically conductive region of each sheet is partially or fully exposed, and at least one electrically conductive region of the first major surface of the second sheet is partially or fully covered by at least one electrically conductive region of the first major surface of the first sheet.
A method for producing a substrate for packaging a microelectronic device, comprising:
- (a) providing first and second sheets, each sheet having opposing first and second major surfaces, each first surface containing a plurality of electrically conductive regions;
- and
- (b) arranging the sheets such that the second major surface of the first sheet faces the first major surface of the second sheet, at least one electrically conductive region of each sheet is partially or fully exposed, and at least one electrically conductive region of the first major surface of the second sheet is partially or fully covered by at least one electrically conductive region of the first major surface of the first sheet.
Dependencies are inferred from the claim text.