Abstract:
In some embodiments, an apparatus includes: a first layer (145) with a first surface (144); and a second surface opposite to the first surface. The apparatus also includes a second layer (140) having: a third surface interfacing the second surface; and a fourth surface opposite the third surface. The apparatus further includes a third layer (150) having: a fifth surface interfacing the fourth surface; and a sixth surface opposite the fifth surface. The apparatus also includes a fourth layer (160) having a seventh surface interfacing the sixth surface to form a heteroj unction, which generates a two-dimensional electron gas channel formed in the fourth layer. Further, the apparatus includes a recess (146, 147, 149) that extends from the first surface to the fifth surface.
Abstract:
A method of preparing a self-aligned block (SAB) structure is described. The method includes providing a substrate having raised features defined by a first material containing silicon nitride and a second material containing silicon oxide formed on side walls of the first material, and a third material containing an organic material covering some of the raised features and exposing some raised features according to a block pattern formed in the third material. The method further includes forming a first chemical mixture by plasma-excitation of a first process gas, and exposing the first material on the substrate to the first chemical mixture. Thereafter, the method includes forming a second chemical mixture by plasma-excitation of a second process gas, and exposing the first material on the substrate to the second plasma-excited process gas to selectively etch the first material relative to the second and third material.
Abstract:
Methods for selectively depositing films by atomic layer deposition are disclosed. Substrate surfaces are passivated by hydrosilylation to prevent deposition and allow selective deposition on unpassivated surfaces.
Abstract:
Halidosilane compounds, processes for synthesizing halidosilane compounds, compositions comprising halidosilane precursors, and processes for depositing silicon- containing films (e.g., silicon, amorphous silicon, silicon oxide, silicon nitride, silicon carbide, silicon oxynitride, silicon carbonitride, doped silicon films, and metal-doped silicon nitride films) using halidosilane precursors. Examples of halidosilane precursor compounds described herein, include, but are not limited to, monochlorodisilane (MCDS), monobromodisilane (MBDS), monoiododisilane (MIDS), monochlorotrisilane (MCTS), and monobromotrisilane (MBTS), monoiodotrisilane (MITS). Also described herein are methods for depositing silicon containing films such as, without limitation, silicon, amorphous silicon, silicon oxide, silicon nitride, silicon carbide, silicon oxynitride, silicon carbonitride, doped silicon films, and metal-doped silicon nitride films, at one or more deposition temperatures of about 500°C or less.
Abstract:
In described examples, a microelectronic device (102) contains a high performance silicon nitride layer, which is stoichiometric within 2 atomic percent, has a low stress of 600 MPa to 1000 MPa, and has a low hydrogen content, less than 5 atomic percent, formed by an LPCVD process. The LPCVD process uses ammonia NH3 and dichlorosilane DCS gases in a ratio of 4 to 6, at a pressure of 150 millitorr to 250 millitorr, and at a temperature of 800°C to 820°C.