Abstract: Method of producing a semiconductor device, comprising: a) providing a semiconductor substrate, b) providing an insulating layer on a top surface of the semiconductor substrate, c) making an amorphous layer in a top layer of said semiconductor substrate by a suitable implant, d) implanting a dopant into said semiconductor substrate through said insulating layer to provide said amorphous layer with a predetermined doping profile, said implant being performed such that said doping profile has a peak value located within said insulating layer, e) applying a solid phase epitaxial regrowth action to regrow said amorphous layer and activate said dopant.

Abstract: A planar double-gate transistor is manufactured wherein crystallisation inhibitors are implanted into the channel region (16) of a semiconductor wafer (10), said wafer having a laminate structure comprising an initial crystalline semiconductor layer (14) adjacent an amorphous semiconductor layer (12). Upon heating, partial re-growth of the amorphous semiconductor layer is restricted in the channel area thus allowing for the thickness of the source/drain extension regions to be increased whilst maintaining a thin channel. Any remaining amorphous material is selectively removed leaving a cavity to allow for the forming of gate electrodes (30,32) on opposing sides of the channel region. The invention can be exploited to a greater extent by providing an amorphous layer on both sides of the initial crystalline semiconductor layer thus providing for re-growth limitation in two directions.

Abstract: A method of manufacturing a semiconductor device such as a MOS transistor. The device comprises a polysilicon gate (10) and doped regions (22,24) formed in a semiconductor substrate (12), separated by a channel region (26). The exposed surface of the semiconductor substrate is amorphized, by ion bombardment for example, so as to inhibit subsequent diffusion of the dopant ions during thermal annealing. Low thermal budgets are favored for the activation and polysilicon regrowth to ensure an abrupt doping profile for the source/drain regions. As a consequence an upper portion (10b) of the gate electrode remains amorphous. The upper portion of the gate electrode is removed so as to allow a low resistance contact to be made with the polysilicon lower portion (10a).

Abstract: A method of forming a Si strained layer 16 on a Si substrate 10 includes forming a first SiGe buffer layer 12 on the Si substrate 10. Then, the first SiGe buffer layer is implanted with an amorphising implant to render the first SiGe buffer layer amorphous using ion implantation. A second SiGe buffer layer 14 is grown on the first SiGe buffer layer after annealing. This produces a relaxed SiGe layer 12, 14. Then, the strained layer of Si 16 is grown.

Abstract: Method of producing a semiconductor device, comprising: a) providing a semiconductor substrate, b) providing an insulating layer on a top surface of the semiconductor substrate, c) making an amorphous layer in a top layer of said semiconductor substrate by a suitable implant, d) implanting a dopant into said semiconductor substrate through said insulating layer to provide said amorphous layer with a predetermined doping profile, said implant being performed such that said doping profile has a peak value located within said insulating layer, e) applying a solid phase epitaxial regrowth action to regrow said amorphous layer and activate said dopant.

Abstract: A method of manufacturing a semiconductor device such as a MOS transistor. The device comprises a polysilicon gate (10) and doped regions (22,24) formed in a semiconductor substrate (12), separated by a channel region (26). The exposed surface of the semiconductor substrate is amorphized, by ion bombardment for example, so as to inhibit subsequent diffusion of the dopant ions during thermal annealing. Low thermal budgets are favoured for the activation and polysilicon regrowth to ensure an abrupt doping profile for the source/drain regions. As a consequence an upper portion (10b) of the gate electrode remains amorphous. The upper portion of the gate electrode is removed so as to allow a low resistance contact to be made with the polysilicon lower portion (10a).

Abstract: A method of forming a Si strained layer 16 on a Si substrate 10 includes forming a first SiGe buffer layer 12 on the Si substrate 10. Then, the first SiGe buffer layer is implanted with an amorphising implant to render the first SiGe buffer layer amorphous using ion implantation. A second SiGe buffer layer 14 is grown on the first SiGe buffer layer after annealing. This produces a relaxed SiGe layer 12, 14. Then, the strained layer of Si 16 is grown.