摘要:
A SOLID STATE CIRCUIT ARRANGEMENT HAVING A SEMICONDUCTOR MEMBER AND PRESENTING REDUCED SHUNT CAPACITANES AS THE RESULT OF THE ISLATION OF VARIOUS REGIONS OF THE MEMBER FROM EACH OTHER, AND A METHOD FOR FABRICATING WITH ARRANGEMENT BY FORMING A SUBASSEMBLY OF TWO MEMBERS, CONSTITUTED BY A FIRST INSULATING LAYER AND THE SEMICONDUCTOR MEMBER, BY DEPOSITING ONE OF THE MEMBERS ON THE SURFACE OF THE OTHER THEREOF, DEPOSITING A SECOND INSULATING LAYER ON THE SIDE OF THE SEMICONDUCTOR MEMBER WHICH IS OPPOSITE FROM THE SURFACE UPON WHICH THE FIRST LAYER BEARS, FORMING APERTURES IN AT LEAST ONE OF THE INSULATING LAYERS TO EXPOSE SURFACE PORTIONS OF THE SEMICONDUCTOR MEMBER, AND ETCHING OUT THE PORTIONS OF THE SEMICONDUCTOR MEMBER IN THE REGION OF EACH APERTURE TO CREATE CAVITIES WHICH EXTEND FROM ONE OF THE INSULATING LAYERS TO THE OTHER.
摘要:
A COMPOSITION OF MATTER COMPRISING SPIRO COMPOUNDS HELD IN A MATRIX SUBSTANCE AND EXHIBITING STABLE COLOR CHANGES UPON EXPOSURE TO RADIATION OF CHARACTERISTIC WAVELENGTH. THE COMPOSITION OF MATTER IS EXPOSED RO DATAMODULATED LIGHT OF SUCH WAVELENGTH TO PROVIDE PERMANENT RECORDS OF THE DATA.
摘要:
A METHOD FOR TREATING THE SURFACE OF A CONTAINER AND A CONTAINER WHICH HAS BEEN TREATED ACCORDING TO THE METHOD. THE METHOD INVOLVES COATING AT LEAST THE INSIDE SURFACE OF A CONTAINER WITH A LAYER OF A DIFFUSION-PREVENTATIVE SUBSTANCE. THE CONTAINER, WHICH CAN BE MADE OF QUARTZ, GLASS OR A CERAMIC MATERIAL, CAN THEN BE USED TO HOLD PRODUCTS TO BE ANNEALED IN A HEAT-TREATING FURNACE WITHOUT DIFFUSIONS OUT OF OR INTO THE CONTAINER WALLS.
摘要:
An arrangement for producing an orderly stack of items from a conveyed flow of flat items arriving in irregular amounts and overlapping one another, such as mail shipments, the arrangement including a pass-through separator and a stacker disposed in the conveying path behind the separator, the pass-through separator and the stacker being disposed with respect to one another in such a manner that the suction trough of the separator and the stack formed in the stacker are disposed on respectively opposite sides of the conveying path defined by the items passing from the separator to the stacker.
摘要:
A full adder composed essentially of six identical logic circuits each arranged to receive inputs A1, A2 . . . B1, B2... and to produce outputs C A1 + A2... + B1 + B2... and C A1 + A2... (B1 + B2...), the logic circuits being arranged to receive addend input values Xi and Yi and carry inputs Zi 1, and their complements, and being arranged in at least two groups of circuits, the first group producing an output carry signal and the second group receiving inputs from the first group and producing an output sum signal.
摘要:
A video recording and scanning system includes a disc-type record, and a record player, the record having both video picture signal producing indicia and synchronizing pulse producing indicia recorded on its spiral track, the length of the trackcarrying signals for recording each picture being variable to permit greater compression of information on a given track with short spacings, or greater image resolution detail with long spacings, the number of the pulse indicia having a fixed ratio to the number of individual pictures recorded on the disc, the position of each pulse indicium being fixed relative to the position of the indicia for producing each picture, the record player including a scanning means, a comparison circuit and a disc speed varying means, the scanning means being mounted for relative movement along the track and producing both picture signals and pulse signals, the comparison circuit comparing the frequency of the pulse signals to a reference frequency to produce an adjustment signal, and the disc speed varying means being responsive to the adjustment signal to vary the speed at which the record track moves past the scanning head so that the variable length portions of track-carrying signals for producing one image move past the scanning means in the same period of time and produce a constant picture changing frequency which is independent of the length of the track carrying the signals for producing each picture.
摘要:
An optoelectronic or photosensitive semiconductor device in which a light-emitting element and a light-responsive element are arranged in a common casing, the degree of photocoupling between the two elements being dependent entirely on conditions exterior of the casing. In one embodiment, the two elements are embedded in a light-permeable mass, the boundary surface of which, together with a medium surrounding the mass, forms a surface whose reflection characteristic is dependent on the indices of refraction of the mass and of the medium, the elements themselves being so arranged that when the index of refraction of the medium is such that the boundary reflects the light coming from the light-emitting element, the reflected light is picked up by the light-responsive element, with the amount of light being picked up being dependent on, and thus an indication of, the medium surrounding the mass. In another embodiment, light emitted by the light-emitting element is free to exit the mass and, if reflected by an object outside the mass, is picked up by the lightresponsive element.
摘要:
A tunable input circuit with high selectivity for feeding a signal to a variable-frequency band-pass filter with tuning elements identical to those of the input circuit. The high selectivity produced by the input circuit is a minimum in the range of the received frequency and a maximum in the range of the image frequency. The input circuit is a bridge having four arms with impedances in them and four points connecting the arms. The impedances are diagonally matched, and one set is variable. One set of diagonally opposite points connecting the arms is connected between an antenna lead and ground. A voltage-variable capacitance (such as a voltage-variable diode) is connected between the other pair of connecting points. A tuning voltage is fed back to the voltage-variable capacitance means. This voltage is preferably the same voltage used to tune the band-pass filter.
摘要:
The frequency tunability of a semiconductor oscillator of the type wherein the frequency is dependent on the transit time of charge carriers in an electric field is improved by exposing the semiconductor device to a magnetic field which extends perpendicular to the normal direction of movement of the charge carriers by providing the semiconductor body with strip-shaped metal conductive paths which extend perpendicular to both the transverse component of the magnetic field and the electric field in order to short circuit any resulting Hall voltages. The frequency of the oscillation is varied by varying the magnitude of the transverse magnetic field.
摘要:
The disclosure relates to a method of producing one or more integrated semiconductor circuits in which the usable basic circuits on a semiconductor wafer are connected together and the useless basic circuits bypassed. For this, a conductive path mask is produced photographically from at least two individual masks one of which represents the conductive paths to a usable basic circuit and another of which represents the paths necessary to bypass a useless basic circuit.