Method for fabricating a wafer level package having through wafer vias for external package connectivity
First Claim
1. A method for fabricating a wafer level package, said method comprising:
- forming a polymer layer on a device wafer, said device wafer comprising at least one device wafer contact pad and at least one device, said at least one device wafer contact pad being electrically connected to said at least one device;
bonding a protective wafer to said device wafer;
forming at least one via in said protective wafer, said at least one via extending through said protective wafer;
wherein said at least one via is situated over said at least one device wafer contact pad.
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Accused Products
Abstract
According to an exemplary embodiment, a method for fabricating a wafer level package includes forming a polymer layer on a device wafer, where the device wafer includes at least one device wafer contact pad and a device, and where the at least one device wafer contact pad is electrically connected to the device. The method further includes bonding a protective wafer to the device wafer. The method further includes forming at least one via in the protective wafer, where the at least one via extends through the protective wafer and is situated over the at least one device wafer contact pad. The method further includes forming at least one protective wafer contact pad on the protective wafer, where the at least one protective wafer contact pad is situated over the at least one via and electrically connected to the at least one device wafer contact pad.
107 Citations
30 Claims
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1. A method for fabricating a wafer level package, said method comprising:
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forming a polymer layer on a device wafer, said device wafer comprising at least one device wafer contact pad and at least one device, said at least one device wafer contact pad being electrically connected to said at least one device;
bonding a protective wafer to said device wafer;
forming at least one via in said protective wafer, said at least one via extending through said protective wafer;
wherein said at least one via is situated over said at least one device wafer contact pad. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11-20. -20. (canceled)
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21. A method for fabricating a wafer level package, said method comprising:
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forming a polymer layer on a device wafer, said device wafer comprising at least one device wafer contact pad and at least one device, said at least one device wafer contact pad being electrically connected to said at least one device;
forming a seal ring and at least one opening in said polymer layer, said seal ring surrounding said at least one device and said at least one opening being situated over said at least one device wafer contact pad;
bonding a protective wafer to said device wafer in a bonding process;
wherein said bonding process utilizes said polymer layer as a bonding layer. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification