摘要:
The construction of a film on a wafer, which is placed in a processing chamber, may be carried out through the following steps. A layer of material is deposited on the wafer. Next, the layer of material is annealed. Once the annealing is completed, the material may be oxidized. Alternatively, the material may be exposed to a silicon gas once the annealing is completed. The deposition, annealing, and either oxidation or silicon gas exposure may all be carried out in the same chamber, without need for removing the wafer from the chamber until all three steps are completed. A semiconductor wafer processing chamber for carrying out such an in-situ construction may include a processing chamber, a showerhead, a wafer support and a rf signal means. The showerhead supplies gases into the processing chamber, while the wafer support supports a wafer in the processing chamber. The rf signal means is coupled to the showerhead and the wafer support for providing a first rf signal to the showerhead and a second rf signal to the wafer support.
摘要:
A method and apparatus for constructing subroutines to define the behavior of simulation objects is provided. The apparatus includes a display, a processor, and an input device. The processor generates on the display a GRR set region associated with a simulation object. A user operates the input device to place visual representations of rules and/or subroutines within the GRR set region. When a visual representation of a rule or subroutine is placed within a GRR set, computer step sequences that implement the behavior specified for the rule or subroutine are generated for the simulation object. A user may operate the input device to activate a control on a visual subroutine indicator to cause a subroutine region to appear. When a visual representation of a rule or subroutine is placed within a subroutine region, the behavior specified for the rule or subroutine is incorporated into the subroutine associated with the subroutine region. Different types of subroutines are provided, where the type of a subroutine determines how the rules within the subroutine are processed during a simulation. Pretests may be specified for subroutines so that the behavior represented by the rules within the subroutine will not be exhibited unless the current state of the simulation satisfies the conditions of the pretest. During the performance of a simulation, the processor displays images associated with simulation objects on the display. The processor causes the images to behave according to the generalized computer step sequences that have been generated based upon the rules and/or subroutines represented in the GRR set regions for the respective objects.
摘要:
An extensible simulation system and graphical programming method enable a simulation user to program the behaviors of objects in a simulation while requiring no knowledge of computer programming concepts or languages. The simulation user defines each object's behaviors by creating Graphical Rewrite Rules through programming by demonstration. The user can selectively abstract a given Graphical Rewrite Rule (GRR) such that it applies to states within the simulation according to hierarchical object types and object property conditions. The extensible simulation system comprises a Central Processing Unit (CPU), an input device, an output device, an external storage device, predetermined amounts of Random Access Memory (RAM) and Read-Only Memory (ROM), and an extensible simulator. The extensible simulator comprises an object source, a simulation viewer, a GRR editor, an action recorder, an abstractor, a drawing editor, an object property editor, an object rule viewer, a subroutine editor, and a simulation execution controller. Each element of the system has an input and an output coupled to a common system bus. Preferably, each element of the extensible simulator is a computer program step sequence stored in RAM. The graphical programming method comprises the steps of: selecting an object for which a GRR is to be defined; establishing a simulation context corresponding to the GRR; defining for the GRR a set of actions to be performed by or upon one or more objects within the simulation context, each action defined through programming by demonstration; automatically recording a computer program step sequence for each action defined; and allowing the GRR to be abstracted.
摘要:
A telemetry system for use in controlling the operation of sensors configured on a rotating blade of a gas turbine engine includes an oscillator for generating a power carrier signal. A mechanism is included for providing command signals that select a mode of operation of the sensors and a telemetry encoder apparatus is used to generate encoder signals for modulating the power carrier signal in accordance with the selected mode of sensor operation. Also included in the present telemetry system is a programmable switch receiving the power carrier signal for modulating the power carrier signal amplitude in accordance with the encoder signals. A resistor shunts the programmable switching mechanism, and a coil transmits the modulated power carrier signal to a transceiver positioned on the turbine blade providing control signals to the sensor and transmitting sensor information to a receiver coil off of the turbine blade.
摘要:
A process of preparing an actinide compound of the formula An.sub.x Z.sub.y wherein An is an actinide metal atom selected from the group consisting of thorium, uranium, plutonium, neptunium, and americium, x is selected from the group consisting of one, two or three, Z is a main group element atom selected from the group consisting of nitrogen, phosphorus, oxygen and sulfur and y is selected from the group consisting of one, two, three or four, by admixing an actinide organometallic precursor wherein said actinide is selected from the group consisting of thorium, uranium, plutonium, neptunium, and americium, a suitable solvent and a protic Lewis base selected from the group consisting of ammonia, phosphine, hydrogen sulfide and water, at temperatures and for time sufficient to form an intermediate actinide complex, heating said intermediate actinide complex at temperatures and for time sufficient to form the actinide compound, and a process of depositing a thin film of such an actinide compound, e.g., uranium mononitride, by subliming an actinide organometallic precursor, e.g., a uranium amide precursor, in the presence of an effectgive amount of a protic Lewis base, e.g., ammonia, within a reactor at temperatures and for time sufficient to form a thin film of the actinide compound, are disclosed.
摘要:
An unstable optical resonator having a gain region that has an elliptic or other non-circular cross section still has the benefits of a total collimated cavity Fresnel number that is azimuthally symmetric by the combination of several cavity regions of azimuthally non-uniform Fresnel number of appropriate size.
摘要:
An improved automatic placement process for placing logic cells in a universal array. Unused basic units are assigned to rows to reduce the congestion of the wiring in high congestion regions of a universal array. These assigned unused basic units are allocated among rows in a pyramidal manner. Those unused basic units allocated to a given row are distributed along that row in a manner to reduce wiring congestion. During a pair exchange portion of the placement process, quality criteria used for deciding whether to exchange two logic cells on different rows include skipped rows in a node, y-span of a node, minimizing the number of logic cells in excess of two in a node on a row, making a longest row shorter and making longer a shortest row or one which is within a tolerance of being a shortest row.
摘要:
A mass spectrometer having a thermospray ion source, suitable for the analysis of liquid samples is disclosed. The source comprises a strongly heated atomizing nozzle (4) through which the sample is pumped into a spray chamber (5, 11), and an aperture in a cone (26), through which the ions pass through an electrostatic lens (15, 16, 17) into a region (23) in which a mass analyzer is situated. Electrode means (27, 45) generate a repulsive electrostatic field which improves the efficiency of the transmission of ions through the hole in the cone (26). The electrode is situated downstream of the hole in cone (26). By further increasing the potential on the electrode (27, 45) the nature of the ions passing through the hole in the cone (26) can be changed from largely adduct and cluster ions formed by association of solvent molecules with sample ions in the thermospray to largely pseudomolecular sample ions similar to those formed by conventional chemical ionization.
摘要:
Small hot particles contained in fluid stream 101 are partially vaporized by laser 46 and deflected transversely to the direction of flow out of interaction region 45 and into removal duct 65. An alternate embodiment ionizes the particles and deflects them by an electric field.