Microelectronic assembly with multi-layer support structure
First Claim
Patent Images
1. A microelectronic assembly comprising:
- a device wafer portion having a surface that includes an active region;
a support structure disposed on the surface of the device wafer portion and located adjacent to, but not extending onto, the active region; and
a lid in contact with the support structure and extending over the active region,wherein the support structure is formed of a plurality of planar sheets, each planar sheet having a substantially uniform composition,the plurality of planar sheets comprises;
first and second adhesive layers coupled to the device wafer portion and to the lid, respectively, andthe composition of the first adhesive layer differs from the composition of the second adhesive layer.
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Abstract
A method of forming a microelectronic assembly includes positioning a support structure adjacent to an active region of a device but not extending onto the active region. The support structure has planar sections. Each planar section has a substantially uniform composition. The composition of at least one of the planar sections differs from the composition of at least one of the other planar sections. A lid is positioned in contact with the support structure and extends over the active region. The support structure is bonded to the device and to the lid.
382 Citations
27 Claims
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1. A microelectronic assembly comprising:
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a device wafer portion having a surface that includes an active region; a support structure disposed on the surface of the device wafer portion and located adjacent to, but not extending onto, the active region; and a lid in contact with the support structure and extending over the active region, wherein the support structure is formed of a plurality of planar sheets, each planar sheet having a substantially uniform composition, the plurality of planar sheets comprises; first and second adhesive layers coupled to the device wafer portion and to the lid, respectively, and the composition of the first adhesive layer differs from the composition of the second adhesive layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 24, 25)
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13. A microelectronic assembly, comprising:
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a device wafer having a surface that includes one or more active regions; a support structure disposed on the surface of the device wafer and located adjacent to each of the one or more active regions but not extending onto any of the active regions; and a lid wafer in contact with the support structure and extending over each of the one or more active regions, wherein the support structure is formed of a plurality of planar sheets, each planar sheet having a substantially uniform composition, the plurality of planar sheets comprises; first and second adhesive layers coupled to the device wafer and to the lid wafer, respectively, and the composition of the first adhesive layer differs from the composition of the second adhesive layer. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 26, 27)
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Specification