Surface acoustic wave device package and method
First Claim
1. A package for an acoustic wave device having an active area on a face thereof, the package comprising:
- a substrate with a top surface and a plurality of conductive pads disposed thereon;
a plurality of stud bumps electrically connected to the face of the acoustic wave device and arranged near a periphery of the acoustic wave device, the stud bumps being aligned in proximity to the conductive pads and coupled to the conductive pads to form interconnections;
a dam disposed on the top surface of the substrate between the substrate and the acoustic wave device, the dam disposed within the periphery of the acoustic wave device and interconnections; and
an underfill material sealing the acoustic wave device to the substrate between the periphery of the acoustic wave device and the top surface of the substrate, the dam providing a boundary to the underfill material allowing the underfill material to encapsulate the interconnections and preventing the underfill material from contacting the active area on the face of the acoustic wave device so as to provide a sealed cavity within which the active area is sealed.
2 Assignments
0 Petitions
Accused Products
Abstract
A method for packaging an acoustic wave device (10) without contaminating an active area (12) disposed on a face (14) thereof, including steps of: providing a substrate with a top (30) having conductive pads (18), bonding stud bumps (20) to a periphery (22) of the face (14) of the acoustic wave device, disposing a dam (26) onto the top (30) of the substrate and inside of the location of the conductive pads (18), aligning and connecting the stud bumps (20) to the conductive pads (18) on the top of the substrate to form electrically conductive interconnections between the acoustic wave device (10) and the substrate (16), flowing an underfill material (28) at the periphery (22) of the acoustic wave device and around the interconnections such that the underfill material (28) stops at a boundary (32) defined by the dam (26), and curing the underfill material (28) to mechanically reinforce and protectively encapsulate the interconnections.
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Citations
23 Claims
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1. A package for an acoustic wave device having an active area on a face thereof, the package comprising:
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a substrate with a top surface and a plurality of conductive pads disposed thereon; a plurality of stud bumps electrically connected to the face of the acoustic wave device and arranged near a periphery of the acoustic wave device, the stud bumps being aligned in proximity to the conductive pads and coupled to the conductive pads to form interconnections; a dam disposed on the top surface of the substrate between the substrate and the acoustic wave device, the dam disposed within the periphery of the acoustic wave device and interconnections; and an underfill material sealing the acoustic wave device to the substrate between the periphery of the acoustic wave device and the top surface of the substrate, the dam providing a boundary to the underfill material allowing the underfill material to encapsulate the interconnections and preventing the underfill material from contacting the active area on the face of the acoustic wave device so as to provide a sealed cavity within which the active area is sealed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for packaging an acoustic wave device having an active area disposed on a face thereof, the method comprising the steps of:
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providing a substrate with a top surface having a plurality of conductive pads disposed thereon; disposing a dam onto the top surface of the substrate and inside of the location of the conductive pads; bonding a plurality of stud bumps to a periphery of the face of the acoustic wave device; aligning the stud bumps with their associated mirror image conductive pads and placing the stud bumps in proximity to the conductive pads on the top surface of the substrate; connecting the acoustic wave device onto the substrate such that the stud bumps of the acoustic wave device and the associated conductive pads of the substrate form electrical and mechanical interconnections; flowing an underfill material at the periphery of the acoustic wave device and around the interconnections such that the underfill material stops at a boundary defined by the dam; and curing the underfill material to mechanically reinforce and protectively encapsulate the interconnections and provide a sealed cavity within which the active area is sealed. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for packaging an acoustic wave device having an active area disposed on a face thereof, the method comprising the steps of:
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providing a substrate with a top surface having a plurality of conductive pads disposed thereon; disposing a dam of photoimageable organic material onto the top surface of the substrate and inside of the location of the conductive pads; bonding a plurality of stud bumps to a periphery of the face of the acoustic wave device; aligning the stud bumps with their associated mirror image conductive pads and placing the stud bumps to abut the conductive pads and positioning the face of the acoustic wave device slightly above the dam such that there is no direct contact therebetween; mechanically bonding the stud bumps directly to the conductive pads forming electrical and mechanical interconnections; flowing an underfill material at the periphery of the acoustic wave device and around the interconnections such that the underfill material stops at a boundary defined by the dam; and curing the underfill material to mechanically reinforce and protectively encapsulate the interconnections and provide a sealed cavity within which the active area is sealed. - View Dependent Claims (22, 23)
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Specification