Controlled cleaving process
First Claim
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1. A method of producing a film of material comprising:
- providing a donor substrate having a first surface;
forming a stress layer across a plane within said donor substrate and parallel to said first surface, the portion of said donor substrate between said first surface and stress layer defining a first portion of said donor substrate;
applying an amount of energy to only a part of said donor substrate to initiate a cleaving action across said stress layer; and
reducing said amount of energy subsequent to said step of applying, said cleaving action propagating across said stress layer to separate said first portion thereby producing said film of material.
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Abstract
A technique for forming a film of material (12) from a donor substrate (10). The technique has a step of introducing energetic particles (22) through a surface of a donor substrate (10) to a selected depth (20) underneath the surface, where the particles have a relatively high concentration to define a donor substrate material (12) above the selected depth. An energy source is directed to a selected region of the donor substrate to initiate a controlled cleaving action of the substrate (10) at the selected depth (20), whereupon the cleaving action provides an expanding cleave front to free the donor material from a remaining portion of the donor substrate.
288 Citations
31 Claims
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1. A method of producing a film of material comprising:
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providing a donor substrate having a first surface;
forming a stress layer across a plane within said donor substrate and parallel to said first surface, the portion of said donor substrate between said first surface and stress layer defining a first portion of said donor substrate;
applying an amount of energy to only a part of said donor substrate to initiate a cleaving action across said stress layer; and
reducing said amount of energy subsequent to said step of applying, said cleaving action propagating across said stress layer to separate said first portion thereby producing said film of material. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of producing a film of material comprising:
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providing a donor substrate having a first surface;
reducing a fracture energy across a planar region within said donor substrate thereby defining a layer of said donor substrate between said first surface and said planar region;
applying a first energy to only a first portion of said donor substrate thereby initiating a cleaving action; and
applying a second energy to only a second portion of said donor substrate thereby propagating said cleaving action across said planar region, wherein completion of propagation of said cleaving action across said planar region separates said layer from the remainder of said donor substrate to produce said film of material. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
introducing hydrogen ions within said donor substrate to define said layer of said donor substrate.
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16. A method of producing a film of material comprising:
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providing a donor substrate having a first surface;
increasing a mechanical stress across a planar region within said donor substrate, said planar region separated from said first surface thereby defining a layer of material between said first surface and said planar region;
globally increasing the energy of said donor substrate by an amount that does not initiate a cleaving action across said planar region; and
applying a first energy to a region less than the entirety of said donor substrate to initiate a separation action of said layer of material from said donor substrate, said separation action proceeding to completion thereby producing said film of material. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
introducing hydrogen ions within said donor substrate to define said layer of material.
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25. A method of fabricating a film of material, the method comprising:
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providing a donor substrate, said donor substrate comprising a stressed layer at a predetermined depth from an upper surface of said donor substrate and a material region defined between an upper surface and said stressed layer, said stressed layer comprising a plurality of particles therein to increase stress within a vicinity of said stressed layer, and providing energy to only a first portion of said donor substrate to initiate a controlled cleaving action to free said material region from a remaining portion of said donor substrate. - View Dependent Claims (26, 27, 28, 29, 30, 31)
introducing hydrogen ions within said donor substrate to define said layer of material.
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Specification