Method of making a stacked microelectronic package
First Claim
1. A method of manufacturing a stacked package comprising the steps of:
- aligning saw lanes of a first wafer with saw lanes of a second wafer such that the saw lanes of the first wafer are positioned above the saw lanes of the second wafer, each of the first and second wafers having first and second microelectronic elements adjacent to and separated by a first saw lane of the saw lanes in a direction transverse to the first saw lane, each of the first and second microelectronic elements of each of the first and second wafers having at least a first trace extending therefrom towards the saw lanes;
exposing at least the first traces of each of the first and second microelectronic elements of each of the first and second wafers by at least partially cutting through the aligned first saw lane of the first wafer and second wafer; and
forming a lead in contact with at least the exposed first traces of each of the first and second microelectronic elements of each of the first and second wafers; and
severing the first and second wafers to form first and second individual stacked packages, each of the first and second individual stacked packages including portions of each of the first and second wafers, such that a first portion of the lead is in contact with and in electrical communication with the first traces of each of the first and second wafers of the first individual stacked package and a second portion of the lead is in contact with and in electrical communication with the first traces of each of the first and second wafers of the second individual stacked package.
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Abstract
A method of making a stacked microelectronic package by forming a microelectronic assembly by stacking a first subassembly including a plurality of microelectronic elements onto a second subassembly including a plurality of microelectronic elements, at least some of the plurality of microelectronic elements of said first subassembly and said second subassembly having traces that extend to respective edges of the microelectronic elements, then forming notches in the microelectronic assembly so as to expose the traces of at least some of the plurality of microelectronic elements, then forming leads at the side walls of the notches, the leads being in electrical communication with at least some of the traces and dicing the assembly into packages. Additional embodiments include methods for creating stacked packages using substrates and having additional traces that extend to both the top and bottom of the package.
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Citations
15 Claims
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1. A method of manufacturing a stacked package comprising the steps of:
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aligning saw lanes of a first wafer with saw lanes of a second wafer such that the saw lanes of the first wafer are positioned above the saw lanes of the second wafer, each of the first and second wafers having first and second microelectronic elements adjacent to and separated by a first saw lane of the saw lanes in a direction transverse to the first saw lane, each of the first and second microelectronic elements of each of the first and second wafers having at least a first trace extending therefrom towards the saw lanes; exposing at least the first traces of each of the first and second microelectronic elements of each of the first and second wafers by at least partially cutting through the aligned first saw lane of the first wafer and second wafer; and forming a lead in contact with at least the exposed first traces of each of the first and second microelectronic elements of each of the first and second wafers; and severing the first and second wafers to form first and second individual stacked packages, each of the first and second individual stacked packages including portions of each of the first and second wafers, such that a first portion of the lead is in contact with and in electrical communication with the first traces of each of the first and second wafers of the first individual stacked package and a second portion of the lead is in contact with and in electrical communication with the first traces of each of the first and second wafers of the second individual stacked package. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of making a stacked microelectronic package, the method comprising the steps of:
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forming a microelectronic assembly by stacking a first subassembly having saw lanes and including a plurality of microelectronic elements onto a substrate having saw lanes such that the saw lanes of the first subassembly are aligned with the saw lanes of the substrate, stacking a second subassembly having saw lanes and including a plurality of microelectronic elements above said first subassembly such that the saw lanes of the second subassembly are aligned with the saw lanes of the first subassembly, at least some of the plurality of microelectronic elements of said first subassembly and said second subassembly having traces that extend to respective edges of the microelectronic elements; forming notches in the microelectronic assembly at the saw lanes of the respective subassemblies so as to expose the traces of at least some of the plurality of microelectronic elements; and forming leads at the side walls of the notches, the leads being in electrical communication with at least some of the traces. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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Specification