摘要:
A method of fabricating a silicon-on-plastic layer via layer transfer includes depositing a layer of SiGe on a silicon substrate; depositing a layer of silicon; implanting splitting hydrogen ions into the silicon substrate; bonding a glass substrate to the silicon layer; splitting the wafer; removing the silicon layer and a portion of the SiGe layer; depositing a dielectric on the silicon side of the silicon-on-glass wafer; applying adhesive and bonding a plastic substrate to the silicon side of the silicon-on-glass wafer; removing the glass from the glass side of the bonded, silicon-on-glass wafer to form a silicon-on-plastic wafer; and completing a desired IC device on the silicon-on-plastic. Multi-level structure may be fabricated according to the method of the invention by repeating the last few steps of the method of the invention.
摘要:
A floating body germanium (Ge) phototransistor with a photo absorption threshold bias region, and an associated fabrication process are presented. The method includes: providing a p-doped Silicon (Si) substrate; selectively forming an insulator layer overlying a first surface of the Si substrate; forming an epitaxial Ge layer overlying the insulator layer; forming a channel region in the Ge layer; forming a gate dielectric, gate electrode, and gate spacers; forming source/drain (S/D) regions in the Ge layer; and, forming a photo absorption threshold bias region in the Ge layer, adjacent the channel region. In one aspect, the second S/D region has a length, longer than the first S/D length. The photo absorption threshold bias region underlies the second S/D region. Alternately, the second S/D region is separated from the channel by an offset, and the photo absorption threshold bias region is the offset in the Ge layer, after a light p-doping.
摘要:
A floating body germanium (Ge) phototransistor and associated fabrication process are presented. The method includes: providing a silicon (Si) substrate; selectively forming an insulator layer overlying the Si substrate; forming an epitaxial Ge layer overlying the insulator layer using a liquid phase epitaxy (LPE) process; forming a channel region in the Ge layer; forming a gate dielectric, gate electrode, and gate spacers overlying the channel region; and, forming source/drain regions in the Ge layer. The LPE process involves encapsulating the Ge with materials having a melting temperature greater than a first temperature, and melting the Ge using a temperature lower than the first temperature. The LPE process includes: forming a dielectric layer overlying deposited Ge; melting the Ge; and, in response to cooling the Ge, laterally propagating an epitaxial growth front into the Ge from an underlying Si substrate surface.
摘要:
A method of fabricating a silicon-on-glass layer via layer transfer includes depositing a layer of SiGe on a silicon substrate; relaxing the SiGe layer; depositing a layer of silicon on the relaxed SiGe layer; implanting hydrogen ions in a second hydrogen implantation step to facilitate splitting of the wafer; bonding a glass substrate to the strained silicon layer to form a composite wafer; splitting the composite wafer to provide a split wafer; and processing the split wafer to prepare it for subsequent device fabrication.
摘要:
A high-density Germanium (Ge)-on-Insulator (GOI) photodiode array and corresponding fabrication method are provided. The method includes: forming an array of pixel driver nMOST devices, each device having a gate connected to a row line in a first orientation, a first source/drain (S/D) region, and a second S/D region connected to Vdd; forming a P-I-N Ge diode for each pixel as follows: forming a n+ region; forming an intrinsic Ge region overlying the n+ region; forming a p+ junction in the intrinsic Ge; and, isolating the P-I-N Ge diodes; and, forming an Indium Tin oxide (ITO) column in a second orientation, about orthogonal to the first orientation, overlying the P-I-N Ge diodes.
摘要:
A method of fabricating a germanium photodetector includes preparing a silicon wafer as a silicon substrate; depositing a layer of silicon nitride on the silicon substrate; patterning and etching the silicon nitride layer; depositing a first germanium layer on the silicon nitride layer; patterning and etching the germanium layer wherein a portion of the germanium layer is in direct physical contact with the silicon substrate; depositing a layer of silicon oxide on the germanium layer wherein the germanium layer is encapsulated by the silicon oxide layer; annealing the structure at a temperature wherein the germanium melts and the other layers remain solid; growing a second, single-crystal layer of germanium on the structure by liquid phase epitaxy; selectively removing the silicon oxide layer; and completing the germanium photodetector.
摘要:
A 3D quantum dot optical path structure is provided, along with a method for selectively forming a 3D quantum dot optical path. The method comprises: forming a single crystal Si substrate with a surface; forming a Si feature in the substrate, such as a via, trench, or pillar; forming dots from a Ge or SiGe material overlying the Si feature; and, forming an optical path that includes the dots. In some aspects of the method, the Si feature has defect sites. For example, the Si feature may be formed with a miscut angle. As a result of the miscut angle, steps are formed in the Si feature plane. Then, the dots are formed in the Si feature steps. The miscut angle is in the range between 0.1 and 5 degrees, and the spacing between steps is in the range between 1 and 250 nanometers (nm).
摘要:
A dual gate strained-Si MOSFET with thin SiGe dislocation regions and a method for fabricating the same are provided. The method comprises: forming a first layer of relaxed SiGe overlying a substrate, having a thickness of less than 5000 Å; forming 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; forming a layer of strained-Si overlying the first and second SiGe layers; forming a shallow trench isolation region interposed between the first SiGe layer and the second SiGe layer; forming an n-well in the substrate and the overlying first layer of SiGe; forming a p-well in the substrate and the overlying second layer of SiGe; forming channel regions, in the strained-Si, and forming PMOS and NMOS transistor source and drain regions.
摘要:
Methods of forming a SiGe layer overlying an insulator are provided. A layer of SiGe is deposited on a substrate and implanted with ion to form a defect region within the SiGe material below its surface. The SiGe layer is then patterned and transferred by contact bonding to an insulator on a second substrate. After contact bonding the structure is annealed to split the SiGe layer along the defect region. The splitting anneal will relax the SiGe layer. Additional annealing at higher temperatures may be used to further relax the SiGe layer. A layer of strained silicon may then be epitaxial deposited on the resulting structure of relaxed SiGe on insulator. Another method provides for epitaxially depositing a layer of silicon over the SiGe layer prior to patterning. The silicon layer would then be bonded to the insulator on the second substrate. The splitting anneal and additional anneals, if any, should then induce strain into the silicon layer. The silicon layer would then remain over the insulator after the SiGe layer is removed.
摘要:
A method is provided for forming a matching thermal expansion interface between silicon (Si) and gallium nitride (GaN) films. The method provides a (111) Si substrate and forms a first aluminum (Al)-containing film in compression overlying the Si substrate. Nano-column holes are formed in the first Al-containing film, which exposes regions of the underlying Si substrate. A layer of GaN layer is selectively grown from the exposed regions, covering the first Al-containing film. The GaN is grown using a lateral nanoheteroepitaxy overgrowth (LNEO) process. The above-mentioned processes are reiterated, forming a second Al-containing film in compression, forming nano-column holes in the second Al-containing film, and selectively growing a second GaN layer. Film materials such as Al2O3, Si1-xGex, InP, GaP, GaAs, AlN, AlGaN, or GaN, may be initially grown at a low temperature. By increasing the growth temperatures, a compressed layer of epitaxial GaN can be formed on a Si substrate.
摘要翻译:提供了一种在硅(Si)和氮化镓(GaN)膜之间形成匹配的热膨胀界面的方法。 该方法提供(111)Si衬底并且在压缩覆盖Si衬底上形成第一含铝(Al)的膜。 在第一含Al膜中形成纳米柱孔,其暴露下面的Si衬底的区域。 从暴露区域选择性地生长GaN层,覆盖第一含Al膜。 使用横向纳米外延生长(LNEO)工艺生长GaN。 重复上述过程,在压缩中形成第二含Al膜,在第二含Al膜中形成纳米柱孔,并选择性地生长第二GaN层。 可以最初在低温下生长诸如Al 2 O 3 3,Si 1-x Ge x,InP,GaP,GaAs,AlN,AlGaN或GaN的膜材料。 通过增加生长温度,可以在Si衬底上形成外延GaN的压缩层。