Low temperature semiconductor layering and three-dimensional electronic circuits using the layering
First Claim
1. A method for forming a three dimensional interconnected structure comprising the steps of:
- forming sets of devices on at least one receiver substrate of semiconductor material and at least one donor substrate of semiconductor material;
implanting said at least one donor substrate of semiconductor material with two or more exfoliating implants;
bonding said at least one donor substrate to said at least one receiver substrate to form a bonded structure; and
heating the bonded structure until a portion of said at least one donor substrate exfoliates from the bonded structure and leaves a residual portion of said at least one donor substrate bonded to said at least one receiver substrate.
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Accused Products
Abstract
In a method for forming a three dimensional interconnected structure, sets of devices on receiver and donor semiconductor substrates. The donor substrate is implanted with two or more exfoliating implants, the substrates are bonded together to form a bonded structure that is heated until a portion of the donor substrate exfoliates from the bonded structure and leaves a residual portion of the donor bonded to the receiver. To form three dimensional interconnected integrated circuits from devices formed on donor and receiver substrates, the receiver devices are covered with a protective and bonding layer. Interconnect structures extending from the surface of the protective and bonding layer to the devices of the receiver are formed, and a donor is implanted with two or more exfoliating implants. After bonding and heating of the two substrates until a portion of the donor exfoliates from the bonded substrates, leaving a remaining layer of the donor bonded to the receiver, the resulting devices are interconnected in an integrated circuit.
397 Citations
38 Claims
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1. A method for forming a three dimensional interconnected structure comprising the steps of:
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forming sets of devices on at least one receiver substrate of semiconductor material and at least one donor substrate of semiconductor material;
implanting said at least one donor substrate of semiconductor material with two or more exfoliating implants;
bonding said at least one donor substrate to said at least one receiver substrate to form a bonded structure; and
heating the bonded structure until a portion of said at least one donor substrate exfoliates from the bonded structure and leaves a residual portion of said at least one donor substrate bonded to said at least one receiver substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for forming three dimensional interconnected integrated circuits comprising the steps of:
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forming devices on donor and receiver substrates;
covering the devices on said receiver substrate with a protective and bonding layer;
forming interconnect structures extending from a surface of the protective and bonding layer to the devices of the receiver substrate;
implanting said donor substrate with two or more exfoliating implants;
bonding said donor substrate and said receiver substrate together;
heating the bonded substrates until a portion of said donor substrate exfoliates from said bonded substrates and leaves a remaining layer of said donor substrate bonded to said receiver substrate; and
interconnecting devices on said receiver substrate and said donor substrate. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A silicon-on-insulator (SOI) integrated circuit comprising;
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a receiver substrate of semiconductor material with a first set of devices;
an insulating layer over the receiver substrate;
and an initial exfoliated substrate of semiconductor material over the insulating layer, said initial exfoliated substrate comprising a second set of devices; and
a plurality of conductive interconnections extending from a plurality of device regions in the receiver substrate through the insulating layer and to a plurality of device regions in the donor substrate. - View Dependent Claims (28, 29, 30, 31)
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32. An integrated circuit comprising a receiver substrate with a first set of devices;
- an insulating layer over the receiver substrate, and at least one exfoliated substrate on the insulating layer, a second set of devices formed in a second, exfoliated substrate, and a plurality of conductive interconnections extending from a plurality of device regions in the receiver substrate to a plurality of device regions in the donor substrate.
- View Dependent Claims (33, 34, 35, 36, 37, 38)
Specification