Abstract: An insulated lead frame for a semiconductor packaged device and a method of manufacturing both the insulated lead frame and the semiconductor packaged device are disclosed. The insulated lead frame has a first plurality of lead fingers and a second plurality of lead fingers. It also has the face of a power supply bus lying between the pluralities of lead fingers. An insulator covers the face of the power supply bus. An example of an insulator is a cured liquid polyimide. In a semiconductor packaged device using a lead on chip lead frame, such as a dynamic random access memory, DRAM, wire bonding that connects the power supply busses of the lead frame may first occur and the liquid insulator may afterwards be applied to the power supply busses. Alternatively, by knowing where the wire bonds will bond to the power supply busses, the liquid insulator may be applied to the power supply busses before wire bonding occurs. The bonding spots on the power supply busses are not covered with the liquid insulator.

Abstract: In an apparatus for tracking an optical disc, speed in acquiring a steady tracking condition is significant. That is, if the light beam is subjected to feedback while it is positioned in a positive feedback region, e.g., in the middle of adjoining tracks, the track servo system causes an oscillation. Therefore, according to the present invention, there is effected a comparison between the magnitude of signals from two pits disposed offset from the track and a pit on the track to determine the position of the light beam so that the tracking error signal may be inversed when the light beam is positioned in the middle of adjoining tracks. This will operate the tracking system in the negative feedback region to more quickly achieve a stable tracking state.

Abstract: A direct memory access controller coupled to a system bus for controlling a data transfer by a direct memory access comprises an internal bus, a data handler coupled to the system data bus and the internal bus for controlling an exchange of data between the system bus and the internal bus, a microsequencer which controls by microprograms parts of the direct memory access controller in units of one system clock cycle during one present transfer cycle, and a programmable logic array part supplied with a transfer request, a transfer mode information and at least portions of a transfer address and a byte count. The programmable logic array part is coupled to the internal bus and outputs control information required during a next transfer cycle during one transfer cycle which corresponds to a predetermined number of system clock cycles.

Abstract: An optical recording and reproducing system having an accurate high-speed optical head positioning apparatus. In one embodiment, a positive acceleration is applied to the optical head until the optical head has moved half the distance to a target track. Thereafter, a negative acceleration is applied to the optical head to decelerate the optical head until the optical head arrives at the target track. Feedback control is not used while the optical head is moving, thus eliminating a delay in response time due to a limited servo band upon the transition from the positive acceleration to the negative acceleration.

Abstract: A data transfer control system controls a data transfer between a source and a destination by rearranging a data arrangement of a data which is made up of data units each made up of one or a plurality of bits, and comprises an input/output interface unit for inputting the data from the source and for outputting the data to the destination, a data swap circuit coupled to the input/output interface unit for rearranging a data arrangement of the data received from the source through the input/output interface unit in terms of the data unit and for rearranging a data arrangement of the data outputted to the destination through the input/output interface unit in terms of the data unit, a temporary register for temporarily storing the data with the rearranged data arrangement obtained from the data swap circuit, and a data swap control circuit coupled to the data swap circuit for controlling the rearranging of the data arrangement in the data swap circuit responsive to a transfer information which includes at least

Abstract: A programmable logic array includes a programmable logic array being precharged and discharged in synchronism with a clock signal supplied thereto and outputting an operation result with respect to input data supplied thereto. The programmable logic array also includes a circuit connected to the programmable logic array, for holding the programmable logic array in a precharged state by setting the clock signal to a fixed level when the programmable logic array is not selected and for switching the programmable logic array to a discharged state by supplying the clock signal the programmable logic array when the programmable logic array is selected, so that the programmable logic array is discharged on the basis of the contents of the input data when selected.

Abstract: An opto-electric transducing element and a method for producing the same use a corrugated semiconductor substrate to produce an opto-electric transducing element. The element has a reduced effective thickness and an improved opto-electric conversion efficiency, while maintaining the mechanical strength.

Abstract: A data transfer controlling apparatus for direct memory access comprising one or more first microaddress registers, each of which registers stores microaddress information for program processing of the data transfer for a corresponding channel; a second microaddress register which stores microaddress information for program processing other than the program processing of the data transfer; a micro read only memory operatively connected to said first and second microaddress registers, for storing microinstructions and outputting a predetermined microinstruction in accordance with microaddress information read out from a selected one of the first microaddress registers and the second microaddress register; and an incremental element operatively connected to said first and second microaddress registers, for incrementing the value of the microaddress information read out from the selected one of the first microaddress registers and the second microaddress register, and for writing the incremented microaddress inf

Abstract: A semiconductor integrated circuit comprises an internal data bus, a first holding part for entering and holding data which are obtained from outside the semiconductor integrated circuit via the internal data bus, a reading part for reading out the data held in the first holding part and for outputting the read out data to the internal data bus, a second holding part for entering and holding the data which is read out by the reading part via the internal data bus, a third holding part for entering and holding test data which are obtained from outside the semiconductor integrated circuit bia the internal data bus, a discriminating part for comparing the data held in the second and third holding part and for obtaining a discrimination result based on whether the compared data coincide, and an output part for outputtting the discrimination result of the discrimination part of the outside of the semiconductor integrated circuit.

Abstract: In an apparatus for tracking an optical disk, readiness in acquiring a steady tracking condition is significant. That is, if the light beam is subjected to feed back while it is positioned in a positive feed back region, e.g., in the middle of adjoining tracks, the track servo system causes an oscillation. Therefore, according to the present invention, the magnitudes of signals from two pits disposed offset from the track and a pit on the track are compared whereby position of the light beam is detected so that the tracking error signal may be cut off when the light beam is positioned in the middle of adjoining tracks.

Abstract: In a method of recording/reproducing information associated with an apparatus and recording medium, the medium has an alternate formation including tracks of first regions wherein at least an optical record of preformatted pits at a constant time interval is recorded and second regions in which information is recorded so that optical retrieval can be achieved. A clock signal is generated based on the readout signal of the preformatted pits to record an information signal in the second regions, and the clock signal is retarded and used to read out data pits that are the record of the information in the second regions.

Abstract: A photo-electric converting device has a plurality of emitters with a non-circular or non-dot shape in order to improve the photo-electric converting efficiency. The distance between the adjacent emitters has a predetermined relation to the average diffusion length of the minority carriers in a base layer in order to further improve the photo-electric conversion efficiency. The device is formed to have groove structures to restrain the photo-electric conversion loss due to reflected light.

Abstract: A process for producing solar cells which comprises applying a composition for anti-reflection coating formation on one side of a silicon base plate having a p-n junction therein, printing an Ag paste for contact formation on predetermined areas of the coat, and heat-treating the resulting plate at a temperature of 400.degree. to 900.degree. C. to complete anti-reflection coating and a light-receiving side contact, the process being characterized in that the composition for anti-reflection coating formation contains as essential component, (a) at least one member selected from the metal-organic ligand complex compounds represented by the general formula M(OR.sub.1).sub.n (L).sub.a-n wherein M is a metal selected from Zn, Al, Ga, In, Ti, Zr, Sn, V, Nb, Ta, Mo, and W; R.sub.1 is a C.sub.1 -C.sub.18 alkyl group; L is an organic ligand which forms an non-hydrolyzable bond with the metal ion; a is the valency of the metal M; and n is an integer satisfying 1.ltoreq.

Abstract: A non-mass-analyzed ion implantation process wherein two or more species of ions of the same polarity having greatly different ion masses are generated from a compound source material, the ions are accelerated under the application of an electric field, and the accelerated ions are scanned under the application of a magnetic field so as to be implanted into a target at a distribution profile which varies with the species of ions. An ion implantation apparatus can be simplified. A large ion beam current with a large spot size can be used and ions can be implanted to the target at a large dose within a short time. Especially, the non-mass-analyzed ion implantation is advantageously utilized for production of solar batteries.

Abstract: An electrode material for semi-conductor device such as solar cells comprises Ag powders, at least one metal of zirconium, hafnium, vanadium, niobium, and tantalum, an organic binder, and an organic solvent, and, if necessary, glass, Pd powders and Pt powders.The electrodes are prepared from the electrode material by printing, drying and firing at a low temperature and have a low contact resistance without any junction breakage or increase in leak current.