Abstract:
A thermal processing apparatus and method in which a first laser source, for example, a CO2 emitting at 10.6 μm is focused onto a silicon wafer as a line beam and a second laser source, for example, a GaAs laser bar emitting at 808 nm is focused onto the wafer as a larger beam surrounding the line beam. The two beams are scanned in synchronism in the direction of the narrow dimension of the line beam to create a narrow heating pulse from the line beam when activated by the larger beam. The energy of GaAs radiation is greater than the silicon bandgap energy and creates free carriers. The energy of the CO2 radiation is less than the silicon bandgap energy so silicon is otherwise transparent to it, but the long wavelength radiation is absorbed by the free carriers.
Abstract:
A method for high temperature selenization of Cu—In—Ga metal precursor films comprises ramping the precursor film to a temperature between about 350 C and about 450 C in an inert gas and at a pressure between about 1 atmosphere and about 2 atmospheres. A partial selenization is performed at a temperature between about 350 C and about 450 C in a Se-containing atmosphere. The film is then ramped to a temperature between about 450 C and about 550 C in an inert gas and at a pressure between about 1 atmosphere and about 2 atmospheres, followed by an additional selenization step at a temperature between about 450 C and about 550 C in a Se-containing atmosphere. The film is then annealed at a temperature between about 550 C and about 650 C in an inert gas.
Abstract:
Methods are described for forming CIGS absorber layers in TFPV devices with graded compositions and graded band gaps. Methods are described for utilizing Al to increase the band gap at the front surface of the absorber layer. Methods are described for forming a Cu—In—Ga layer followed by partial or full selenization. This results in a higher Ga concentration at the back interface. The substrate is then exposed to an aluminum CVD precursor while the substrate is still in the selenization equipment to deposit a thin Al layer. The substrate is then exposed to a Se source to fully convert the absorber layer. This results in a higher Al concentration at the front of the absorber.
Abstract:
A thermal processing apparatus and method in which a first laser source, for example, a CO2 emitting at 10.6 μm is focused onto a silicon wafer as a line beam and a second laser source, for example, a GaAs laser bar emitting at 808 nm is focused onto the wafer as a larger beam surrounding the line beam. The two beams are scanned in synchronism in the direction of the narrow dimension of the line beam to create a narrow heating pulse from the line beam when activated by the larger beam. The energy of GaAs radiation is greater than the silicon bandgap energy and creates free carriers. The energy of the CO2 radiation is less than the silicon bandgap energy so silicon is otherwise transparent to it, but the long wavelength radiation is absorbed by the free carriers.
Abstract:
A thermal processing apparatus and method in which a first laser source, for example, a CO2 emitting at 10.6 μm is focused onto a silicon wafer as a line beam and a second laser source, for example, a GaAs laser bar emitting at 808 nm is focused onto the wafer as a larger beam surrounding the line beam. The two beams are scanned in synchronism in the direction of the narrow dimension of the line beam to create a narrow heating pulse from the line beam when activated by the larger beam. The energy of GaAs radiation is greater than the silicon bandgap energy and creates free carriers. The energy of the CO2 radiation is less than the silicon bandgap energy so silicon is otherwise transparent to it, but the long wavelength radiation is absorbed by the free carriers.
Abstract:
Embodiments of the invention generally provide a method for forming a doped silicon-containing material on a substrate. In one embodiment, the method provides depositing a polycrystalline layer on a dielectric layer and implanting the polycrystalline layer with a dopant to form a doped polycrystalline layer having a dopant concentration within a range from about 1×1019 atoms/cm3 to about 1×1021 atoms/cm3, wherein the doped polycrystalline layer contains silicon or may contain germanium, carbon, or boron. The substrate may be heated to a temperature of about 800° C. or higher, such as about 1,000° C., during the rapid thermal anneal. Subsequently, the doped polycrystalline layer may be exposed to a laser anneal and heated to a temperature of about 1,000° C. or greater, such within a range from about 1,050° C. to about 1,400° C., for about 500 milliseconds or less, such as about 100 milliseconds or less.
Abstract translation:本发明的实施方案通常提供了在衬底上形成掺杂的含硅材料的方法。 在一个实施例中,该方法提供在电介质层上沉积多晶层并且用掺杂剂注入多晶层以形成掺杂浓度在约1×10 19原子/ cm 3至约1×10 21原子/ cm 3范围内的掺杂多晶层,其中 掺杂多晶层含有硅或可含有锗,碳或硼。 在快速热退火期间,衬底可以被加热到约800℃或更高,例如约1000℃的温度。 随后,掺杂多晶层可以暴露于激光退火并加热至约1000℃或更高的温度,例如在约1050℃至约1400℃的温度下,持续约500毫秒或更短 ,例如约100毫秒或更少。
Abstract:
A method of processing a substrate comprising depositing a layer comprising amorphous carbon on the substrate and then exposing the substrate to electromagnetic radiation have one or more wavelengths between about 600 nm and about 1000 nm under conditions sufficient to heat the layer to a temperature of at least about 300° C. is provided. Optionally, the layer further comprises a dopant selected from the group consisting of nitrogen, boron, phosphorus, fluorine, and combinations thereof. In one aspect, the layer comprising amorphous carbon is an anti-reflective coating and an absorber layer that absorbs the electromagnetic radiation and anneals a top surface layer of the substrate. In one aspect, the substrate is exposed to the electromagnetic radiation in a laser annealing process.
Abstract:
A method of processing a substrate comprising depositing a layer comprising amorphous carbon on the substrate and then exposing the substrate to electromagnetic radiation have one or more wavelengths between about 600 nm and about 1000 nm under conditions sufficient to heat the layer to a temperature of at least about 300° C. is provided. Optionally, the layer further comprises a dopant selected from the group consisting of nitrogen, boron, phosphorus, fluorine, and combinations thereof. In one aspect, the layer comprising amorphous carbon is an anti-reflective coating and an absorber layer that absorbs the electromagnetic radiation and anneals a top surface layer of the substrate. In one aspect, the substrate is exposed to the electromagnetic radiation in a laser annealing process.
Abstract:
A method of processing a substrate comprising depositing a layer comprising amorphous carbon on the substrate and then exposing the substrate to electromagnetic radiation have one or more wavelengths between about 600 nm and about 1000 nm under conditions sufficient to heat the layer to a temperature of at least about 300° C. is provided. Optionally, the layer further comprises a dopant selected from the group consisting of nitrogen, boron, phosphorus, fluorine, and combinations thereof. In one aspect, the layer comprising amorphous carbon is an anti-reflective coating and an absorber layer that absorbs the electromagnetic radiation and anneals a top surface layer of the substrate. In one aspect, the substrate is exposed to the electromagnetic radiation in a laser annealing process.
Abstract:
A method of processing a substrate comprising depositing a layer comprising amorphous carbon on the substrate and then laser annealing the substrate is provided. Optionally, the layer further comprises a dopant selected from the group consisting of nitrogen, boron, phosphorus, fluorine, and combinations thereof. In one aspect, the layer comprising amorphous carbon is an anti-reflective coating and an absorber layer that absorbs electromagnetic radiation emitted by the laser and anneals a top surface layer of the substrate.