摘要:
A method of fabricating a nanowire CHEMFET sensor mechanism includes preparing a silicon substrate; depositing a polycrystalline ZnO seed layer on the silicon substrate; patterning and etching the polycrystalline ZnO seed layer; depositing an insulating layer over the polycrystalline ZnO seed layer and the silicon substrate; patterning and etching the insulating layer to form contact holes to a source region and a drain region; metallizing the contact holes to form contacts for the source region and the drain region; depositing a passivation dielectric layer over the insulating layer and the contacts; patterning the passivation layer and etching to expose the polycrystalline ZnO seed layer between the source region and the drain region; and growing ZnO nanostructures on the exposed ZnO seed layer to form a ZnO nanostructure CHEMFET sensor device.
摘要:
A device and a fabrication method are provided for a ZnO nanotip electroluminescence (EL) device on a silicon (Si) substrate. The method includes: forming a Si substrate; forming a bottom contact overlying the Si substrate; forming a seed layer overlying the bottom contact; forming ZnO nanotips with tops, overlying the seed layer; forming an insulating film overlying the ZnO nanotips; etching the insulating film; exposing the ZnO nanotip tops; and, forming a transparent top electrode overlying the exposed ZnO nanotip tops. In one aspect, after forming the ZnO nanotips, an ALD process can be used to coat the ZnO nanotips with a material such as Al2O3 or HfO2. The seed layer can be ZnO or ZnO:Al, formed using a deposition process such as sputtering, chemical vapor deposition (CVD), spin-on, or atomic layer deposition (ALD).
摘要:
A methods of forming a microlens structure are provided. An embodiment of the method comprises exposing a photoresist layer a predetermined focus and exposure to sensitize a lens-shaped region within the photoresist layer. The photoresist layer is then developed to form a lens-shaped region within the photoresist layer. The lens-shaped region may then be transferred to an underlying material. The underlying material may be a transparent material within which a lens is subsequently formed. Alternatively, the underlying material is a lens material that will form the microlens once the lens-shaped region is transferred.
摘要:
An oxide interface and a method for fabricating an oxide interface are provided. The method comprises forming a silicon layer and an oxide layer overlying the silicon layer. The oxide layer is formed at a temperature of less than 400° C. using an inductively coupled plasma source. In some aspects of the method, the oxide layer is more than 20 nanometers (nm) thick and has a refractive index between 1.45 and 1.47. In some aspects of the method, the oxide layer is formed by plasma oxidizing the silicon layer, producing plasma oxide at a rate of up to approximately 4.4 nm per minute (after one minute). In some aspects of the method, a high-density plasma enhanced chemical vapor deposition (HD-PECVD) process is used to form the oxide layer. In some aspects of the method, the silicon and oxide layers are incorporated into a thin film transistor.
摘要:
A dual-gate MOSFET with metal gates and a method for setting threshold voltage in such a MOSFET is provided. The method comprises: forming a gate oxide layer overlying first and second channel regions; forming a first metal layer having a first thickness overlying the gate oxide layer; forming a second metal layer having a second thickness overlying the first metal layer first thickness; selectively removing the second metal layer overlying the first channel region; forming a third metal layer; establishing a first MOSFET with a gate work function responsive to the thicknesses of the first and third metal layer overlying the first channel region; and, establishing a second MOSFET, complementary to the first MOSFET, with a gate work function responsive to the combination of the thicknesses of the first, second, and third metal layers overlying the second channel region.
摘要:
A method is provided to deposit niobium monoxide gates. An elemental metal target, or a composite niobium monoxide target is provided within a sputtering chamber. A substrate with gate dielectric, for example silicon dioxide or a high-k gate dielectric, is provided in the sputtering chamber. The sputtering power and oxygen partial pressure within the chamber is set to deposit a film comprising niobium monoxide, without excess amounts of elemental niobium, NbO2 insulator, or Nb2O5 insulator. The deposition method may be incorporated into a standard CMOS fabrication process, or a replacement gate CMOS process.
摘要翻译:提供了一种沉积一氧化monoxide栅的方法。 在溅射室内设置元素金属靶或复合铌靶。 在溅射室中提供具有栅极电介质的衬底,例如二氧化硅或高k栅极电介质。 室内的溅射功率和氧分压被设定为沉积包含一氧化铌的膜,而不含过量的元素铌,NbO 2绝缘体或Nb 2 O 5绝缘体。 沉积方法可以结合到标准CMOS制造工艺或替代栅极CMOS工艺中。
摘要:
A method of improving the electrical properties of high dielectric constant films by depositing an initial film and implanting oxygen ions to modify the film by decreasing the oxygen deficiency of the film while reducing or eliminating formation of an interfacial silicon dioxide layer. An initial high dielectric constant material is deposited over a silicon substrate by means of CVD, reactive sputtering or evaporation. Oxygen ions are preferably implanted using plasma ion immersion (PIII), although other methods are also provided. Following implantation the substrate is annealed to condition the high dielectric constant film.
摘要:
A high-k dielectric film is provided which remains amorphous at relatively high annealing temperatures. The high-k dielectric film is a metal oxide of either Zr or Hf, doped with a trivalent metal, such as Al. Because the film resists the formation of a crystalline structure, interfaces to adjacent films have fewer irregularities. When used as a gate dielectric, the film can be made thin to support smaller transistor geometries, while the surface of the channel region can be made smooth to support high electron mobility. Also provided are CVD, sputtering, and evaporation deposition methods for the above-mentioned, trivalent metal doped high dielectric films.
摘要:
A method of fabricating a grayscale reticle includes preparing a quartz wafer substrate; depositing a layer of SRO on the top surface of the quartz substrate; patterning and etching the SRO to form an initial microlens pattern using step-over lithography; patterning and etching the SRO to form a recessed pattern in the SRO; depositing an opaque film on the SRO; patterning and etching the opaque film; depositing and planarizing a planarizing layer; cutting the quartz wafer into rectangular pieces sized to be smaller than a selected blank reticle; bonding the a piece a to selected reticle blank to form a grayscale reticle; and using the grayscale reticle to form a microlens array on a photoimager.
摘要:
A method of selectively enhancing the sensitivity of a metal oxide sensor includes fabricating a ZnO sensor having a ZnO sensor element therein; and exposing the ZnO sensor element to a plasma stream.