Abstract:
A method for forming a transistor includes defining agate structure on a top surface of a first semiconductor layer of a silicon-on-insulator (SOI) substrate. The gate structure includes an insulating cover. A second semiconductor layer is then conformally deposited. The deposited second semiconductor layer includes an epitaxial portion on surfaces of the first semiconductor layer and an amorphous portion on surfaces of the insulating cover. The amorphous portion is then removed using a selective etch. The remaining epitaxial portion forms faceted raised source-drain structures on either side of the transistor gate structure. A slope of the sloped surface for the facet is dependent on the process parameters used during the conformal deposition.
Abstract:
An extended-drain transistor is formed in a semiconductor layer arranged on one side of an insulating layer with a semiconductor region being arranged on the other side of the insulating layer. The semiconductor region includes a first portion of a first conductivity type arranged in front of the source and at least one larger portion of the gate and a second portion of a second conductivity type arranged in front of at least the larger portion of the extended drain region, each of the first and second portions being coupled to a connection pad.
Abstract:
The disclosure concerns a method of stressing a semiconductor layer comprising: depositing, over a semiconductor on insulator (SOI) structure having a semiconductor layer in contact with an insulating layer, a stress layer; locally stressing said semiconductor layer by forming one or more openings in said stress layer, said openings being aligned with first regions of said semiconductor layer in which transistor channels are to be formed; and deforming second regions of said insulating layer adjacent to said first regions by temporally decreasing, by annealing, the viscosity of said insulator layer.
Abstract:
A transformer of the balanced-unbalanced type includes a primary inductive circuit and a secondary inductive circuit housed inside an additional inductive winding connected in parallel to the terminals of the secondary circuit and inductively coupled with the primary circuit and the secondary circuit.
Abstract:
In one embodiment there is disclosed a method for manufacturing an integrated circuit in a semiconductor substrate including through vias and a coplanar line, including the steps of: forming active components and a set of front metallization levels; simultaneously etching from the rear surface of the substrate a through via hole and a trench crossing the substrate through at least 50% of its height; coating with a conductive material the walls and the bottom of the hole and of the trench; and filling the hole and the trench with an insulating filling material; and forming a coplanar line extending on the rear surface of the substrate, in front of the trench and parallel thereto, so that the lateral conductors of the coplanar line are electrically connected to the conductive material coating the walls of the trench.
Abstract:
An electro-optical phase shifter to be located in an optical waveguide may include a rib of a semiconductor material extending along a length of the optical waveguide and a control structure configured to modify a concentration of carriers in the rib according to a control voltage present between first and second control terminals of the phase shifter. The control structure may include a conductive layer covering a portion of the rib and electrically connected to a first of the control terminals. An insulating layer may be configured to electrically isolate the conductive layer from the rib.
Abstract:
An integrated circuit includes a silicon-on-insulator wafer and interconnect layer providing a support for a coplanar waveguide formed above a top side of the support. A through-silicon via is formed from a back side of the support and passing through the silicon-on-insulator wafer to reach the interconnect layer. A trench is formed from the back side of the support underneath the coplanar waveguide. The trench extends over at least an entire length of the coplanar waveguide. The trench passes through the silicon-on-insulator wafer to reach the interconnect layer and may have a substantially same depth as the through-silicon via.
Abstract:
The production of spacers at flanks of a transistor gate, including a step of forming a dielectric layer covering the gate and a peripheral region of a layer of semiconductor material surrounding the gate, including forming a superficial layer covering the gate and the peripheral region; partially removing the superficial layer configured so as to completely remove the superficial layer at the peripheral region while preserving a residual part of the superficial layer at the flanks; and selective etching of the dielectric layer vis-à-vis the material of the residual part of the superficial layer and vis-à-vis the semiconductor material.
Abstract:
A data transmission circuit transmits a data signal over a transmission line. A digital to analog converter (DAC) operates to receive N-bit input digital values for conversion to corresponding ones of 2N different DC voltage levels. The DAC selects, for each N-bit input digital value, one of the 2N DC voltage levels. An analog to digital converter (ADC) operates to sense the DC voltage on the transmission line for conversion to a corresponding N-bit output digital value.
Abstract:
A method includes making a gate stack on the surface of an active zone, including depositing a first dielectric layer; depositing a gate conductive layer; depositing a first metal layer; depositing a second metal layer; depositing a second dielectric layer; partially etching the gate stack for the formation of a gate zone on the active zone; making insulating spacers on either side of the gate zone on the active zone; making source and drain electrodes zones; making silicidation zones on the surface of the source and drain zones; etching, in the gate zone on the active zone, the second dielectric layer and the second metal layer with stopping on the first metal layer, so as to form a cavity between the insulating spacers; making a protective plug at the surface of the first metal layer of the gate zone on the active zone, where the protective plug fills the cavity.