Abstract:
An integrated circuit (IC) includes at least one capacitor with metal electrodes. At least one of the electrodes (10 or 30) is formed from at least surface-silicided hemispherical grain silicon or silicon alloy. A fabrication process for obtaining such a capacitor with silicided metal electrodes is also provided.
Abstract:
Capacitive coupling devices and methods of fabricating a capacitive coupling device are disclosed. The coupling device could include a stack of layers forming electrodes and at least one insulator. The insulator could include a a region of doped silicon. The silicon could be doped with a species selected from Ce, Cr, Co, Cu, Dy, Er, Eu, Ho, Ir, Li, Lu, Mn, Pr, Rb, Sm, Sr, Tb, Tm, Yb, Y, Ac, Am, Ba, Be, Cd, Gd, Fe, La, Pb, Ni, Ra, Sc, Th, Hf, Tl, Sn, Np, Rh, U, Zn, Ag, and Yb in relief and forming roughnesses relative to the neighbouring regions of the same level in the stack. The electrodes and the insulator form conformal layers above the doped silicon region.
Abstract:
A semiconductor material is protected against the formation of a metal silicide by forming a layer of a silicon/germanium alloy on the material. The material which is protected belongs to a component of an integrated circuit comprising other components that have to be subjected to a siliciding operation. The method of protection includes depositing a layer of silicon/germanium alloy on the integrated circuit. The layer of silicon/germanium alloy is then removed from the areas to be silicided. A metal is then deposited on the structure and a metal silicide is formed therefrom. The unreacted metal and the metal/ silicon/germanium ternary alloy that may have formed are removed, and the layer of silicon/germanium alloy is removed so as to expose the unsilicided component.
Abstract:
The invention concerns a conducting layer having a thickness of between 1 and 5 atoms, an insulated gate being formed over a part of the conducting layer.
Abstract:
An integrated circuit provided with an NMOS transistor includes a metal silicide on source, drain and gate regions and also on at least one portion of the source and drain extension zones The metal silicide portion located on the source and drain extension zones is thinner than the metal silicide portion located on the source and drain regions.
Abstract:
An MOS transistor with a fully silicided gate is produced by forming a silicide compound in the gate separately and independently of silicide portions located in source and drain zones of the transistor. To this end, the silicide portions of the source and drain zones are covered by substantially impermeable coatings. The coatings prevent the silicide portions of the source and drain zones from increasing in volume during separate and independent formation of the gate silicide compound. The silicide gate may thus be thicker than the silicide portions of the source and drain zones.
Abstract:
A process for forming a silicide on top of at least one silicon portion on the surface of a semiconductor wafer, comprising the following steps: a) implanting, at a defined depth in the silicon portion, through a dielectric layer, of ions that have the property of limiting the silicidation of metals; b) performing heat treatment; c) depositing a metal layer, the metal being capable of forming a silicide by thermal reaction with the silicon; d) performing rapid thermal processing suitable for siliciding the metal deposited at step c); and e) removing the metal that has not reacted to the thermal processing of step d). Advantageously, the thickness of the silicide layer created at step d) is controlled by a suitable choice of the depth of the implantation carried out in step a).