摘要:
A dual gate strained-Si MOSFET with thin SiGe dislocation regions and a method for fabricating the same are provided. The method forms a first layer of relaxed SiGe overlying a substrate, having a thickness of less than 5000 Å; forms a second layer of relaxed SiGe overlying the substrate and adjacent to the first layer of SiGe, having a thickness of less than 5000 Å; forms a layer of strained-Si overlying the first and second SiGe layers; forms a shallow trench isolation region interposed between the first SiGe layer and the second SiGe layer; forms an p-well in the substrate and the overlying first layer of SiGe; forming forms a p-well in the substrate and the overlying second layer of SiGe; forms channel regions, in the strained-Si, and forms PMOS and NMOS transistor source and drain regions.
摘要:
A method of fabricating local interconnect on a silicon-germanium 3D CMOS includes fabricating an active silicon CMOS device on a silicon substrate. An insulator layer is deposited on the silicon substrate and a seed window is opened through the insulator layer to the silicon substrate and to a silicon CMOS device gate. A germanium thin film is deposited on the insulator layer and into windows, forming a contact between the germanium thin film and the silicon device. The germanium thin film is encapsulated in a dielectric material. The wafer is heated at a temperature sufficient to flow the germanium, while maintaining the other layers in a solid condition. The wafer is cooled to solidify the germanium as single crystal germanium and as polycrystalline germanium, which provides local interconnects. Germanium CMOS devices may be fabricated on the single crystal germanium thin film.
摘要:
A silicon/germanium (SiGe) superlattice thermal sensor is provided with a corresponding fabrication method. The method forms an active CMOS device in a first Si substrate, and a SiGe superlattice structure on a second Si-on-insulator (SOI) substrate. The first substrate is bonded to the second substrate, forming a bonded substrate. An electrical connection is formed between the SiGe superlattice structure and the CMOS device, and a cavity is formed between the SiGe superlattice structure and the bonded substrate.
摘要:
A method of forming a SiGe layer having a relatively high germanium content and a relatively low threading dislocation density includes preparing a silicon substrate; depositing a layer of SiGe to a thickness of between about 100 nm to 500 nm, wherein the germanium content of the SiGe layer is greater than 20%, by atomic ratio; implanting H+ ions into the SiGe layer at a dose of between about 1·1016 cm−2 to 5·1016 cm−2, at an energy of between about 20 keV to 45 keV; patterning the SiGe layer with photoresist; plasma etching the structure to form trenches about regions; removing the photoresist; and thermal annealing the substrate and SiGe layer, to relax the SiGe layer, in an inert atmosphere at a temperature of between about 650° C. to 950° C. for between about 30 seconds and 30 minutes.
摘要:
A method of fabricating strained silicon devices for transfer to glass for display applications includes preparing a wafer having a silicon substrate thereon; forming a relaxed SiGe layer on the silicon substrate; forming a strained silicon layer on the relaxed SiGe layer; fabricating an IC device on the strained silicon layer; depositing a dielectric layer on the wafer to cover a gate module of the IC device; smoothing the dielectric; implanting ions to form a defect layer; cutting the wafer into individual silicon dies; preparing a glass panel and the silicon dies for bonding; bonding the silicon dies onto the glass panel to form a bonded structure; annealing the bonded structure; splitting the bonded structure along the defect layer; removing the remaining silicon layer from the silicon substrate and relaxed SiGe layer on the silicon die on the glass panel; and completing the glass panel circuitry.
摘要:
A SiGe surface-normal optical path photodetector structure and a method for forming the SiGe optical path normal structure are provided. The method comprises: forming a Si substrate with a surface; forming a Si feature, normal with respect to the Si substrate surface, such as a via, trench, or pillar; depositing SiGe overlying the Si normal feature to a thickness in the range of 5 to 1000 nanometers (nm); and, forming a SiGe optical path normal structure having an optical path length in the range of 0.1 to 10 microns. Typically, the SiGe has a Ge concentration in the range from 5 to 100%. The Ge concentration may be graded to increase with respect to the deposition thickness. For example, the SiGe may have a 20% concentration of Ge at the Si substrate interface, a 30% concentration of Ge at a SiGe film top surface, and a thickness of 400 nm.
摘要:
A method of fabricating a germanium film on a silicon substrate includes preparing a silicon substrate; depositing a first germanium film to form a continuous germanium film on the silicon substrate; annealing the silicon substrate and the germanium film thereon in a first annealing process to relax the germanium film; depositing a second germanium film on the first germanium film to form a germanium layer; patterning and etching the germanium layer; depositing a layer of dielectric material on the germanium layer; cyclic annealing the silicon substrate having the germanium layer and dielectric material thereon; and completing a device containing the silicon substrate and germanium layer.
摘要:
A method of fabricating a Si1−XGeX film on a silicon substrate includes preparing a silicon substrate; epitaxially depositing a Si1−XGeX layer on the silicon substrate forming a Si1−XGeX/Si interface there between; epitaxially growing a silicon cap on the Si1−XGeX layer; implanting hydrogen ions through the Si1−XGeX layer to a depth of between about 3 nm to 100 nm below the Si1−XGeX/Si interface; amorphizing the Si1−XGeX layer to form an amorphous, graded SiGe layer; and annealing the structure at a temperature of between about 650° C. to 1100° C. for between about ten seconds and sixty minutes to recrystallize the SiGe layer.
摘要:
A method of synthesizing a PGO spin-coating precursor solution includes utilizing the starting materials of lead acetate trihydrate (Pb(OAc)2•3H2O) and germanium alkoxide (Ge(OR)4(R=C2H5 and CH(CH3)2)). The organic solvent is di(ethylene glycol) ethyl ether. The mixed solution of lead and di(ethylene glycol) ethyl ether is heated in an atmosphere of air at a temperature no greater than 185° C., and preferably no greater than 190° C. for a time period in a range of thirty minutes to four hours. During the heating step the color of the solution is monitored to determine when the reaction is complete and when decomposition of the desired product begins to take place. The solution is then added to germanium di(ethylene glycol) ethyl ether to make the PGO spin-coating solution. This second step also entails heating the solution to a temperature no greater than 190° C. for a time period in a range of 0.5 to 2.0 hours. The process results in a PGO precursor solution suitable for use in spin-coating.
摘要:
A germanium (Ge) short wavelength infrared (SWIR) imager and associated fabrication process are provided. The imager comprises a silicon (Si) substrate with doped wells. An array of pin diodes is formed in a relaxed Ge-containing film overlying the Si substrate, each pin diode having a flip-chip interface. There is a Ge/Si interface, and a doped Ge-containing buffer interposed between the Ge-containing film and the Ge/Si interface. An array of Si CMOS readout circuits is bonded to the flip-chip interfaces. Each readout circuit has a zero volt diode bias interface.