Abstract:
Methods of bonding together semiconductor structures include annealing metal of a feature on a semiconductor structure prior to directly bonding the feature to a metal feature of another semiconductor structure to form a bonded metal structure, and annealing the bonded metal structure after the bonding process. The thermal budget of the first annealing process may be at least as high as a thermal budget of a later annealing process. Additional methods involve forming a void in a metal feature, and annealing the metal feature to expand the metal of the feature into the void. Bonded semiconductor structures and intermediate structures are formed using such methods.
Abstract:
Methods of bonding together semiconductor structures include annealing a first metal feature on a first semiconductor structure, bonding the first metal feature to a second metal feature of a second semiconductor structure to form a bonded metal structure that comprises the first metal feature and the second metal feature, and annealing the bonded metal structure. Annealing the first metal feature may comprise subjecting the first metal feature to a pre-bonding thermal budget, and annealing the bonded metal structure may comprise subjecting the bonded metal structure to a post-bonding thermal budget that is less than the pre-bonding thermal budget. Bonded semiconductor structures are fabricated using such methods.
Abstract:
The invention relates to a method for producing UTBOX type structures comprising: a) the assembly of a substrate, known as "donor" substrate (1), with a substrate, known as "receiver" substrate (2), at least one of the two substrates comprising an insulating layer (3) of thickness less than 50 nm, b) a first heat treatment for reinforcing the assembly between the two substrates, at temperature below 400°C, carried out during the assembly and/or after assembly, to reinforce said assembly, c) a second heat treatment at temperature above 900°C, the exposure time between 400°C and 900°C being less than 1 minute or 30 seconds.
Abstract:
The invention relates to a method for measuring a local adhesion energy between two bonded substrates, in a transverse direction, characterized in that it comprises the steps consisting of: - providing that at least one (1) of the two substrates (1, 8) comprise a plurality of elementary test cells (6), each being capable of exerting locally, in the transverse direction, a predetermined mechanical stress (σ) that is a function of the temperature (T), on a bonding interface (10) between the substrates (1, 8), in a direction tending to separate them, - subjecting (21) the substrates to a test temperature, and - identifying (22) zones of the bonding interface (10) showing debonding to deduce from it the local adhesion energy at the test temperature at said zones, the local adhesion energy at a zone of the bonding interface (10) being deduced from the stress exerted by the test cells (6) having caused debonding at said zone.
Abstract:
The invention relates to a method for separating a layer (115) from a composite structure (125), the structure comprising a composite stack formed from at least a support substrate (105) which is partially transparent at a determined wavelength, the layer (115) to be separated and a separation layer (110) interposed between the support substrate and the layer to be separated, the method comprising irradiation of the separation layer (110) through the support substrate (105) by means of incident light ray (124a) at the determined wavelength in order to induce weakening or separation by exfoliation of the separation layer, the light ray being inclined so as to form an angle of incidence Θ such that θ>θ min , where θ min = sin -1 (( n 1/n o )sin(tan -1 ( S / 2h ))), n1 and nO respectively being the refractive index of the support substrate and the refractive index of the external medium (130) in contact with the support substrate (105), from which the said ray comes, S being the width of the said ray and h being the thickness of the support substrate. θθθ
Abstract:
The invention relates to a process for treating a structure semiconductor on insulator comprising a support substrate (1), a layer (2) of oxide or oxynitride of semiconductor material and a thin layer (3) of said semiconductor material. Said process comprises the application of thermal treatment in an atmosphere having fewer than 10 ppm oxygen, and in controlled conditions (temperature, duration), so as to cause at least part of the oxygen of the layer of oxide or oxynitride (2) to be diffused through the thin layer, resulting in decreasing the thickness of oxide or oxynitride in regions (2B) of the layer of oxide or oxynitride (2) distributed according to a determined pattern. Said process comprises the formation on the surface of the thin layer (3) of zones (3B) distributed according to said pattern and exposing a crystallographic orientation different to the rest of the surface (3A) of the thin layer (3).
Abstract:
The invention relates to an electronic device for radio frequency or power applications, comprising a semiconductor layer supporting electronic components on a support substrate, wherein the support substrate(1) comprises a base layer (12) having a thermal conductivity of at least 30 W/m K and a superficial layer (13, 4) having a thickness of at least 5 µm, said superficial layer (13, 14) having an electrical resistivity of at least 3000 Ohm.cm and a thermal conductivity of at least 30 W/m K. The invention also relates to two processes for manufacturing such a device.
Abstract translation:本发明涉及一种用于射频或电力应用的电子设备,包括:支撑基板上的电子部件的半导体层,其中所述支撑基板(1)包括具有至少30W / m K和厚度至少为5μm的表层(13,4),所述表面层(13,14)的电阻率至少为3000欧姆·厘米,导热率为至少30瓦/米 本发明还涉及制造这种装置的两个方法。
Abstract:
The invention relates to a method for manufacturing components on a mixed substrate. It comprises the following steps: providing a substrate (1) of the semiconductor-on-insulator (SeOI) type comprising a buried oxide layer (12) between a supporting substrate (11) and a thin layer (13), forming in this substrate (1) a plurality of trenches (3, 3') opening out at the free surface (130) of said thin layer (13) and extending over a depth such that it passes through said thin layer (13) and said buried oxide layer (12), these primary trenches (3, 3') delimiting at least one island (30) of said SeOI substrate (1), forming a mask (4) inside said primary trenches (3, 3') and as a layer covering the areas of the free surface (130) of said thin layer (13) located outside said islands (30), proceeding with heat treatment for dissolving the buried oxide layer present at said island (30), so as to reduce the thickness thereof.
Abstract:
The invention relates to a process for treating a semiconductor-on- insulator type structure, successively comprising a support substrate (1 ), an oxide layer (2) and a thin semiconductor layer (3), said process comprising the following steps: (a) formation of a silicon nitride or silicon oxinitride mask (4) on the thin semiconductor layer (3), so as to define so-called exposed areas (3a) at the surface of said layer (3), which are not covered by the mask (40, and which are arranged in a desired pattern, (b) application of a heat treatment in a neutral or controlled reducing atmosphere, and under controlled conditions of temperature and time, so as to induce at least a portion of the oxygen of the oxide layer (2) to diffuse through the thin semiconductor layer (3), thereby resulting in the controlled reduction in the oxide thickness in the areas (2a) of the oxide layer corresponding to said desired pattern. In step (a), the mask (4) is formed so as to be at least partially buried in the thickness of the thin semiconductor layer (3).
Abstract:
The invention relates to a substrate comprising successively a base wafer (1), an insulating layer (2) and a top semiconductor layer (3), characterised in that the insulating layer (2) comprises at least a zone wherein the density of charges is in absolute value higher than 10 10 charges/cm 2 . The invention also relates to a process for making such a substrate.