Packaged acoustic and electromagnetic transducer chips
First Claim
1. A packaged chip, comprising:
- a chip having a front face, a rear face opposite said front face, said chip including a device at one of said front and rear faces, said device operable as a transducer of acoustic energy, said chip including a plurality of bond pads exposed at one of said front and rear faces; and
a package element having a dielectric element and a metal layer disposed on said dielectric element, said metal layer including a plurality of contacts conductively connected to said bond pads, said package element further including a recess in registration with said device, said chip and said recess forming a closed cavity adjacent to said device.
1 Assignment
0 Petitions
Accused Products
Abstract
Various embodiments of packaged chips and ways of fabricating them are disclosed herein. One such packaged chip disclosed herein includes a chip having a front face, a rear face opposite the front face, and a device at one of the front and rear faces, the device being operable as a transducer of at least one of acoustic energy and electromagnetic energy, and the chip including a plurality of bond pads exposed at one of the front and rear faces. The packaged chip includes a package element having a dielectric element and a metal layer disposed on the dielectric element, the package element having an inner surface facing the chip and an outer surface facing away from the chip. The metal layer includes a plurality of contacts exposed at at least one of the inner and outer surfaces, the contacts conductively connected to the bond pads. The metal layer further includes a first opening for passage of the at least one of acoustic energy and electromagnetic energy in a direction of at least one of to said device and from said device.
243 Citations
19 Claims
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1. A packaged chip, comprising:
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a chip having a front face, a rear face opposite said front face, said chip including a device at one of said front and rear faces, said device operable as a transducer of acoustic energy, said chip including a plurality of bond pads exposed at one of said front and rear faces; and
a package element having a dielectric element and a metal layer disposed on said dielectric element, said metal layer including a plurality of contacts conductively connected to said bond pads, said package element further including a recess in registration with said device, said chip and said recess forming a closed cavity adjacent to said device. - View Dependent Claims (2, 3, 4)
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5. A packaged chip, comprising:
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a chip having a front face, a rear face opposite said front face, said chip including a device at one of said front and rear faces, said device operable as a transducer of acoustic energy, said chip including a plurality of bond pads exposed at one of said front and rear faces; and
a package element including a through hole, said package element including a dielectric element and a metal layer including a plurality of contacts disposed on said dielectric element, said package element further including a recess aligned to said through hole, and a lid covering said recess, one of said front and rear faces of said chip being mounted to said package element within said recess such that said chip is aligned to said through hole to permit passage of acoustic energy to and from said device and a space beyond said package element, said recess and said lid forming an enclosed cavity adjacent to another one of said front face and said rear face of said chip.
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6. A packaged chip, comprising:
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a chip having an acoustic transducer, said chip including a plurality of bond pads;
a package element including a dielectric element and a metal layer disposed on said dielectric element, said metal layer having a first surface contacting said dielectric element, and a second surface facing away from said dielectric element, said metal layer including a plurality of chip contacts exposed at one of said first and second surfaces, said chip contacts conductively connected to said bond pads, said package element further including a plurality of interconnects conductively connected to said chip contacts, said interconnects exposed at one of said first and second surfaces, said package element further including a first opening aligned to said acoustic transducer for passage of acoustic energy to and from said acoustic transducer; and
an interconnection element having a top surface, a bottom surface opposite said top surface, and a recess disposed between said top surface and said bottom surface, a plurality of top contacts exposed at said top surface, a plurality of bottom contacts exposed at said bottom surface, and conductive features interconnecting said top contacts to said bottom contacts, wherein said top contacts are conductively bonded to said interconnects of said package element. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A packaged chip, comprising:
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a chip having a front face, and rear face opposite said front face, and a device at one of said front and rear faces, said device operable as a transducer of at least one of acoustic energy and electromagnetic energy, said chip including a plurality of bond pads exposed at one of said front and rear faces; and
a package element having a dielectric element and a metal layer disposed on said dielectric element, said package element having an inner surface facing said chip and an outer surface facing away from said chip, said metal layer including a plurality of contacts exposed at at least one of said inner and outer surfaces, said contacts conductively connected to said bond pads, said package element being spaced from said chip so as to define a cavity between said transducer and said package element. - View Dependent Claims (14, 15)
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16. A method of making a packaged chip, comprising:
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providing a chip having a front face and a rear face, said chip including a device disposed at at least one of said front face and said rear face, said device operable as a transducer of at least one of acoustic energy and electromagnetic energy, said chip further including a plurality of bond pads exposed at one of said front face and said rear face;
providing a package element including a dielectric element and a metal layer including a plurality of contacts, said package element further including a first opening;
mounting said chip to said package element such that said first opening is aligned to said device; and
bonding said bond pads to said contacts. - View Dependent Claims (17, 18, 19)
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Specification