摘要:
A method of compensating resistivity of a near-surface region of a substrate includes epitaxially growing a buffer layer on the substrate, wherein the buffer is grown as having a dopant concentration as dependent on resistivity and conductivity of the substrate, so as to deplete residual or excess charge within the near-surface region of the substrate. The dopant profile of the buffer layer be smoothly graded, or may consist of sub-layers of different dopant concentration, to also provide a highly resistive upper portion of the buffer layer ideal for subsequent device growth. Also, the buffer layer may be doped with carbon, and aluminum may be used to getter the carbon during epitaxial growth.
摘要:
The invention includes methods of forming epitaxial silicon-comprising material and methods of forming vertical transistors. In one implementation, a method of forming epitaxial silicon-comprising material includes providing a substrate comprising monocrystalline material. A first portion of the monocrystalline material is outwardly exposed while a second portion of the monocrystalline material is masked. A first silicon-comprising layer is epitaxially grown from the exposed monocrystalline material of the first portion and not from the monocrystalline material of the masked second portion. After growing the first silicon-comprising layer, the second portion of the monocrystalline material is unmasked. A second silicon-comprising layer is then epitaxially grown from the first silicon-comprising layer and from the unmasked monocrystalline material of the second portion. Other aspects and implementations are contemplated.
摘要:
The invention includes methods in which an angled implant is utilized to self-align a source/drain region implant with the top edge of a gateline of a vertical transistor structure. The invention also includes methods in which an angled implant is utilized to implant dopant beneath the gateline of a vertical transistor structure. Vertical transistor structures formed in accordance with methodology of the present invention can be incorporated into various types of integrated circuitry, including, for example, DRAM arrays.
摘要:
A method of forming a plurality of capacitors includes providing a plurality of capacitor electrodes comprising sidewalls. The plurality of capacitor electrodes are supported at least in part with a retaining structure which engages the sidewalls, with the retaining structure comprising a fluid pervious material. A capacitor dielectric material is deposited over the capacitor electrodes through the fluid pervious material of the retaining structure effective to deposit capacitor dielectric material over portions of the sidewalls received below the retaining structure. Capacitor electrode material is deposited over the capacitor dielectric material through the fluid pervious material of the retaining structure effective to deposit capacitor electrode material over at least some of the capacitor dielectric material received below the retaining structure. Integrated circuitry independent of method of fabrication is also contemplated.
摘要:
This invention includes methods of forming layers comprising epitaxial silicon, and field effect transistors. In one implementation, a method of forming a layer comprising epitaxial silicon comprises epitaxially growing a silicon-comprising layer from an exposed monocrystalline material. The epitaxially grown silicon comprises at least one of carbon, germanium, and oxygen present at a total concentration of no greater than 1 atomic percent. In one implementation, the layer comprises a silicon germanium alloy comprising at least 1 atomic percent germanium, and further comprises at least one of carbon and oxygen at a total concentration of no greater than 1 atomic percent. Other aspects and implementations are contemplated.
摘要:
The present disclosure suggests several systems and methods for batch processing of microfeature workpieces, e.g., semiconductor wafers or the like. One exemplary implementation provides a method of depositing a reaction product on each of a batch of workpieces positioned in a process chamber in a spaced-apart relationship. A first gas may be delivered to an elongate first delivery conduit that includes a plurality of outlets spaced along a length of the conduit. A first gas flow may be directed by the outlets to flow into at least one of the process spaces between adjacent workpieces along a first vector that is transverse to the direction in which the workpieces are spaced. A second gas may be delivered to an elongate second delivery conduit that also has outlets spaced along its length. A second gas flow of the second gas may be directed by the outlets to flow into the process spaces along a second vector that is transverse to the first direction.
摘要:
The present disclosure provides methods and systems for controlling temperature. The method has particular utility in connection with controlling temperature in a deposition process, e.g., in depositing a heat-reflective material via CVD. One exemplary embodiment provides a method that involves monitoring a first temperature outside the deposition chamber and a second temperature inside the deposition chamber. An internal temperature in the deposition chamber can be increased in accordance with a ramp profile by (a) comparing a control temperature to a target temperature, and (b) selectively delivering heat to the deposition chamber in response to a result of the comparison. The target temperature may be determined in accordance with the ramp profile, but the control temperature in one implementation alternates between the first temperature and the second temperature.
摘要:
A method of forming a plurality of capacitors includes providing a plurality of capacitor electrodes comprising sidewalls. The plurality of capacitor electrodes are supported at least in part with a retaining structure which engages the sidewalls, with the retaining structure comprising a fluid pervious material. A capacitor dielectric material is deposited over the capacitor electrodes through the fluid pervious material of the retaining structure effective to deposit capacitor dielectric material over portions of the sidewalls received below the retaining structure. Capacitor electrode material is deposited over the capacitor dielectric material through the fluid pervious material of the retaining structure effective to deposit capacitor electrode material over at least some of the capacitor dielectric material received below the retaining structure. Integrated circuitry independent of method of fabrication is also contemplated.
摘要:
An improved charge storing device and methods for providing the same, the charge storing device comprising a conductor-insulator-conductor (CIC) sandwich. The CIC sandwich comprises a first conducting layer deposited on a semiconductor integrated circuit. The CIC sandwich further comprises a first insulating layer deposited over the first conducting layer in a flush manner. The first insulating layer comprises a structure having a plurality of oxygen cites and a plurality of oxygen atoms that partially fill the oxygen cites, wherein the unfilled oxygen cites define a concentration of oxygen vacancies. The CIC sandwich further comprises a second conducting layer deposited over the first insulating layer in a strongly oxidizing ambient so as to reduce the concentration of oxygen vacancies in the first insulating layer, so as to provide an oxygen-rich interface layer between the first insulating layer and the second conducting layer, and so as to trap a plurality of oxygen atoms within the second conducting layer. The oxygen-rich interface layer and second conducting layer act as oxygen vacancy sinks for absorbing migrating oxygen vacancies that originate from the first insulating layer to thereby reduce the concentration of oxygen vacancies in the first insulating layer and to thereby reduce the buildup of oxygen vacancies at the interface layer. Thus, the first insulating layer provides an increased dielectric constant and an increased resistance to current flowing therethrough so as to increase the capacitance of the CIC sandwich and so as to reduce leakage currents flowing through the CIC sandwich.
摘要:
Systems, devices, structures, and methods are described that inhibit dielectric degradation at high temperatures. An enhanced capacitor is discussed. The enhanced capacitor includes a first electrode, a dielectric that includes ditantalum pentaoxide, and a second electrode having a compound. The compound includes a first substance and a second substance. The second electrode includes a trace amount of the first substance. The morphology of the semiconductor structure remains stable when the trace amount of the first substance is oxidized during crystallization of the dielectric. In one embodiment, the crystalline structure of the dielectric describes substantially a (001) lattice plane.