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    • 36. 发明专利
    • FR2848336B1
    • 2005-10-28
    • FR0215550
    • 2002-12-09
    • COMMISSARIAT ENERGIE ATOMIQUE
    • FOURNEL FRANCKMORICEAU HUBERTLAGAHE CHRYSTELLE
    • H01L21/304H01L21/762
    • The method for making a complex structure by assembling two substrates (5,6) by linking two respective faces includes, prior to assembling, the creation of a difference in the states of tangential constraints between the two faces to assemble. The difference is chosen so to obtain in the assembled structure a state of predetermined constraint at the instant of dissociation, in particular to minimize the constraints at the level of the separation zone (5') at that instant. The two substrates (5,6) are curved so that the two faces to assemble are respectively convex and concave, in order to obtain the difference in tangential constraints. The two substrates are curved so that the faces are complementary, in particular spherically convex and spherically concave. The curvature of two substrates is obtained by the application of mechanical forces on each substrate, in a manner to create a pressure difference between the two faces of the substrates. The pressure difference is obtained by suction on a concave preform or inside a cavity, and a complementary convex preform. The second preform is with suction channels so that the substrate can be maintained curved when the first preform is lifted. The preform is a mould, a porous mould, or a deformable body. The assembling of the two substrates is by molecular bonding, and the two faces are treated to facilitate the bonding. The assembling of the two substrates is by direct contact, and the surfaces are adjusted so to avoid air trapping. At least one of the substrates is with an opening, in particular at its centre. At least one substrate comprises a channel opening up at the edge of the substrate. The assembling is carried out at a temperature above the ambient temperature, in particular by heating the substrates by contact with heated preforms, possibly at different temperatures. A method (claimed) for transferring a thin layer from a source substrate to a target substrate comprises the steps of ionic implantation through the face of the source substrate to create a fragility zone at a determined depth, assembling the source substrate and the target substrate to obtain the assembled structure, and the dissociation of the thin layer with the remaining source substrate at the level of fragility zone.
    • 39. 发明专利
    • Pre-stressed substrate manufacturing method for use in microelectronics involves bonding sequence of layers to meet pre-determined constraints
    • FR2848337A1
    • 2004-06-11
    • FR0215552
    • 2002-12-09
    • COMMISSARIAT ENERGIE ATOMIQUE
    • FOURNEL FRANCKMORICEAU HUBERTMONTMAYEUL PHILIPPE
    • H01L21/18H01L21/20H01L21/68H01L21/762H01L21/304
    • The method for making pre-stressed substrate by bonding structures (1,3) once the creation of a difference in the state of tangential constraints between the two faces to be assembled is achieved. The difference is chosen so to obtain a predetermined state of stress within the assembled structure in given conditions with respect to assembling conditions, in particular to reduce a jump in stresses at higher temperatures. The difference in the state of tangential constraints is obtained by curving or bending the two elementary structures to assemble, so to make the faces concave and convex, complementary, in particular spherically concave and spherically convex. The curvature of the two structures is obtained by the application of mechanical forces, in particular by deforming the two structures (1,3) between two preforms (2,4) of profiles chosen as a function of the two faces to assemble. The application of mechanical forces results in the creation of a pressure difference between the two faces, where the pressure difference is obtained by suction on a concave preform (2) or inside a cavity with a peripheral joint. The preform (2) is with a suction channel (5) for maintaining the structure (1) curved even when the preform (4) is lifted. The preform is a mould, a porous mould, or a deformable membrane. The assembling of the two structures is by molecular bonding, and the faces to assemble are treated to facilitate the bonding. The assembling of the two structures is by molecular bonding, and the faces to assemble are treated to facilitate the bonding. The assembling of substrates is by direct contact, and the substrates are adjusted so to avoid air trapping between the surfaces. At least one substrate is with an opening, which is at its center. At least one substrate comprises a channel opening up at the substrate edge. The assembling is implemented by a layer of material which becomes fluid at a higher temperature. The assembling is carried out at a temperature higher than the ambient temperature, and the substrates are heated by contact with heated preforms, possibly at different temperatures. The method includes a technological step of changing the temperature, and the difference in the state of tangential constraints is chosen so that the stresses inside the assembled structure remain below a predetermined threshold. The method also includes, after assembling the two structures, a step of thinning one of the structures, and the thin film can be assembled with another elementary structure. The method includes a step of epitaxial growth to obtain an epitaxial film on the external face of the complex structure. The lattice parameter of the thin film is chosen compatible with the epitaxial growth of additional material.
    • 40. 发明专利
    • Method for making a constrained structure designed to be dissociated at the level of separation zone in order to minimize the jump of constraints at dissociation
    • FR2848336A1
    • 2004-06-11
    • FR0215550
    • 2002-12-09
    • COMMISSARIAT ENERGIE ATOMIQUE
    • FOURNEL FRANCKMORICEAU HUBERTLAGAHE CHRYSTELLE
    • H01L21/304H01L21/762
    • The method for making a complex structure by assembling two substrates (5,6) by linking two respective faces includes, prior to assembling, the creation of a difference in the states of tangential constraints between the two faces to assemble. The difference is chosen so to obtain in the assembled structure a state of predetermined constraint at the instant of dissociation, in particular to minimize the constraints at the level of the separation zone (5') at that instant. The two substrates (5,6) are curved so that the two faces to assemble are respectively convex and concave, in order to obtain the difference in tangential constraints. The two substrates are curved so that the faces are complementary, in particular spherically convex and spherically concave. The curvature of two substrates is obtained by the application of mechanical forces on each substrate, in a manner to create a pressure difference between the two faces of the substrates. The pressure difference is obtained by suction on a concave preform or inside a cavity, and a complementary convex preform. The second preform is with suction channels so that the substrate can be maintained curved when the first preform is lifted. The preform is a mould, a porous mould, or a deformable body. The assembling of the two substrates is by molecular bonding, and the two faces are treated to facilitate the bonding. The assembling of the two substrates is by direct contact, and the surfaces are adjusted so to avoid air trapping. At least one of the substrates is with an opening, in particular at its centre. At least one substrate comprises a channel opening up at the edge of the substrate. The assembling is carried out at a temperature above the ambient temperature, in particular by heating the substrates by contact with heated preforms, possibly at different temperatures. A method (claimed) for transferring a thin layer from a source substrate to a target substrate comprises the steps of ionic implantation through the face of the source substrate to create a fragility zone at a determined depth, assembling the source substrate and the target substrate to obtain the assembled structure, and the dissociation of the thin layer with the remaining source substrate at the level of fragility zone.