Thin film structure for high density inductors and redistribution in wafer level packaging
First Claim
Patent Images
1. A package, comprising:
- a wafer substrate;
a metal stack seed layer comprising a titanium thin film outer layer; and
,a resist layer in contact with said titanium thin film outer layer of said metal stack seed layer, said resist layer forming circuitry, wherein said circuitry comprises one or more embedded die structures.
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Abstract
Disclosed is a package that includes a wafer substrate and a metal stack seed layer. The metal stack seed layer includes a titanium thin film outer layer. A resist layer is provided in contact with the titanium thin film outer layer of the metal stack seed layer, the resist layer forming circuitry. A method for manufacturing a package is further disclosed. A metal stack seed layer having a titanium thin film outer layer is formed. A resist layer is formed so as to be in contact with the titanium thin film outer layer of the metal stack seed layer, and circuitry is formed from the resist layer.
10 Citations
30 Claims
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1. A package, comprising:
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a wafer substrate; a metal stack seed layer comprising a titanium thin film outer layer; and
,a resist layer in contact with said titanium thin film outer layer of said metal stack seed layer, said resist layer forming circuitry, wherein said circuitry comprises one or more embedded die structures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A package, comprising:
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a wafer substrate; a metal stack seed layer comprising a titanium thin film outer layer; and a resist layer in contact with said titanium thin film outer layer of said metal stack seed layer, said resist layer forming circuitry, wherein said metal stack seed layer comprises an aluminum layer, a nickel vanadium layer, a copper layer, and said titanium thin film outer layer.
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15. A method for manufacturing a package, comprising:
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forming a metal stack seed layer having a titanium thin film outer layer; forming a resist layer so as to be in contact with said titanium thin film outer layer of said metal stack seed layer; and forming circuitry from said resist layer; wherein said step of forming circuitry from said resist layer comprises; patterning said resist layer; and
,etching said resist layer to form circuitry. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for manufacturing a package, comprising:
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forming a metal stack seed layer having a titanium thin film outer layer; forming a resist layer so as to be in contact with said titanium thin film outer layer of said metal stack seed layer; and forming circuitry from said resist layer; wherein said circuitry comprises one or more embedded die structures. - View Dependent Claims (29)
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30. A method for manufacturing a package, comprising:
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forming a metal stack seed layer having a titanium thin film outer layer; forming a resist layer so as to be in contact with said titanium thin film outer layer of said metal stack seed layer; and forming circuitry from said resist layer; wherein said step of forming a metal stack seed layer comprises sputtering aluminum, nickel vanadium, copper and said titanium thin film outer layer.
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Specification