Abstract:
High quality epitaxial layers of monocrystalline materials can be grown overlying monocrystalline substrates such as large silicon wafers by forming a compliant substrate for growing the monocrystalline layers. An accommodating buffer layer comprises a layer of monocrystalline oxide spaced apart from a silicon wafer by an amorphous interface layer of silicon oxide. The amorphous interface layer dissipates strain and permits the growth of a high quality monocrystalline oxide accommodating buffer layer. The accommodating buffer layer is lattice matched to both the underlying silicon wafer and the overlying monocrystalline material layer. Any lattice mismatch between the accommodating buffer layer and the underlying silicon substrate is taken care of by the amorphous interface layer. In addition, formation of a compliant substrate may include utilizing surfactant enhanced epitaxy, epitaxial growth of single crystal silicon onto single crystal oxide, and epitaxial growth of Zintl phase materials.
Abstract:
A semiconductor laminate configured for dividing into predetermined parts has a lateral expanse and includes: (a) a monocrystalline substrate substantially coterminous with the lateral expanse; (b) at least one layer including a monocrystalline compound semiconductor material; and (c) at least one intermediate layer substantially separating the substrate and the compound semiconductor material. The at least one compound semiconductor material layer is arrayed to present intervals substantially devoid of the monocrystalline compound semiconductor material that generally establish lateral limits of the predetermined parts. The method includes the steps of: (a) providing a monocrystalline substrate; (b) providing at least one layer including a monocrystalline compound semiconductor material; (c) providing at least one intermediate layer separating the substrate and the compound semiconductor material; and (d) arraying the compound semiconductor material to present intervals substantially devoid of the compound semiconductor material that generally establish lateral limits of the predetermined parts.
Abstract:
A method for manufacturing a monolithic apparatus including a plurality of materials presenting a plurality of coplanar lands includes the steps of: (a) providing a substrate constructed of a first material and presenting a first land; (b) trenching the substrate to effect a cavity appropriately dimensioned to receive a semiconductor structure in an orientation presenting a second land generally coplanar with the first land; (c) depositing an accommodating layer constructed of a second material on the substrate and within the cavity to establish a workpiece; (d) depositing a composition layer constructed of a third material on the substrate; (e) selectively removing portions of the composition layer and the accommodating layer to establish the semiconductor structure; (f) depositing a cap layer constructed of a fourth material on the workpiece; and (g) removing the cap layer to establish a substantially planar face displaced from the plurality of lands by a predetermined distance.
Abstract:
Highly controlled, highly aligned monolithic integration of devices in a high quality monocrystalline material layer (26) with vias (211, 231) fabricated in an underlying monocrystalline substrate (22) in a single monolithic three dimensional architecture (20, 34). Excellent compliancy is achieved in a monolithic semiconductor structure (20, 34) by processes described herein while at the same time fabrication of via openings (211, 231) in the monocrystalline substrate (20, 34) can be made in a controlled, aligned manner to the back side (263) of a high quality monocrystalline film (26). Conductive connections (219, 239) can be made to devices (271, 273) in the high quality monocrystalline layer (26) from its backside (263).