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| Number | Title | Issue Date |
| 4687988 | Weighted random pattern testing apparatus and method A method and apparatus for testing very large scale integrated circuit devices, most particularly Level Sensitive Scan Design (LSSD) devices, by applying differently configured sequences of pseudo-random patterns in parallel to each of the input terminals... | 08/18/1987 |
| 4672676 | Method and apparatus for automatically aligning an object with respect to a reference pattern A method and apparatus for aligning a ceramic substrate provided with two small alignment crosses formed at the same time as the metallic pattern and located on both sides of a symmetry axis, said substrate being disposed on an alignment platen. The metho... | 06/09/1987 |
| 4614885 | Phase splitter with latch A phase splitter with latch comprises a true complement generator in the form of a current switch (T1, T2, T3, R3) which supplies two complementary output signals in response to an input signal (VIN). The outputs of this true complement generator are in e... | 09/30/1986 |
| 4581671 | Magnetic tape recording and playback system A magnetic tape recording and playback system having a tape cassette and battery pack joined by a frangible connection in an integral assembly, wherein for recording the assembly provides battery power to the recorder and the recorder provides recording s... | 04/08/1986 |
| 4579760 | Wafer shape and method of making same A semiconductor wafer shape which when subjected to a simultaneous polishing of both wafer surfaces produces a wafer of superior flatness and surface finish, the said wafer having a diametral cross-sectional shape like that of a "dogbone" wherein the wafe... | 04/01/1986 |
| 4567645 | Method for forming a buried subcollector in a semiconductor substrate by ion implantation The method is comprised of the following steps: implanting arsenic ions through a thin screen oxide layer in the regions of a P type silicon substrate where subcollectors are to be formed, at a dose less than 2.1016 at/cm2, partially etch... | 02/04/1986 |
| 4554458 | Electron beam projection lithography The photoresist film 12 on the surface of a wafer 11 is exposed through the shadow pattern which is generated by a transmission mask 13 arranged a short distance therefrom when the mask is subjected to a large-area electron beam. The source of the electro... | 11/19/1985 |
| 4520314 | Probe head arrangement for conductor line testing with at least one probe head comprising a plurality of resilient contacts A probe head arrangement for contacting a plurality of closely adjacent conductor lines 2 comprises a minimum of one probe head 3, where a plurality of fingers 4 together with a back 5 are made in one piece of monocrystalline silicon in semiconductor tech... | 05/28/1985 |
| 4511428 | Method of controlling oxygen content and distribution in grown silicon crystals An improved method of growing silicon crystals by the Czochralski method to obtain a desired oxygen concentration level with both axial and radial uniformity. A crucible is located within a heater to achieve a given temperature profile which is related to... | 04/16/1985 |
| 4442519 | Memory address sequence generator Apparatus consisting of combinations of interconnected logic elements for generating preselected sequences of addresses for the listing of a matrix memory as a function of preset constants and variable timing impulses, wherein there are first and second X... | 04/10/1984 |
| 4422002 | Piezo-electric travelling support The travelling support (1) comprises a piezo-electric plate (2) resting on three legs (6) whose bottom surface is insulated from the bench (8) on which the support is to travel, by a dielectric (7). The piezo-electric plate (2) can be caused to contract b... | 12/20/1983 |
| 4378383 | Method of making conductive paths through a lamina in a semiconductor device On the layer 12 a mask 3 corresponding to the desired pattern of holes 15 is provided with via openings 14 having overhanging walls. The layer 12 is selectively etched with a method where the etching attack takes place vertically to the layer surface, and... | 03/29/1983 |
| 4052704 | Apparatus for reordering the sequence of data stored in a serial memory This memory management system provides an improved search logic for locating pages of data stored parallel-by-bit, serially-by-page in a shift register memory and for moving those pages to a position at the head of the file. Searching alternates between f... | 10/04/1977 |
| 4047124 | Planar solid state laser array An array of collimated wise aperture electrically pumped leaky corrugated AlGaAs optical waveguide lasers is formed on a single chip by etching a series of grooves oriented with respect to the crystalographic planes to isolate discrete lasers in the array... | 09/06/1977 |
| 4035778 | Apparatus for assigning space in a working memory as a function of the history of usage Apparatus for controlling the division of working memory space among n competitive programs with different characteristics, running in a multiprogramming and virtual memory environment, in which the allocation of working space is optimized by adjusting th... | 07/12/1977 |
| 4007450 | Data sharing computer network A data communication network having a plurality of nodes interconnected with a communication link, wherein each node shares given ones of its data sets in common with other nodes in the network, and each node is operative to update any shared data set, ex... | 02/08/1977 |
| 3996492 | Two-dimensional integrated injection laser array An injection laser, whose sides are chemically etched to produce facing 45° mirrors, can be made to emit lasing light in the same direction as current going through the p-n junction. A two dimensional array of lasers is produced wherein the location of e... | 12/07/1976 |
| 3994559 | Bidirectional guided mode optical film-fiber coupler An optical structure for the bidirectional coupling of light between each of a multiplicity of optical fibers and corresponding individual thin-film waveguides to achieve a leaky wave coupling from one guided mode structure to a second guided mode structu... | 11/30/1976 |
| 3985423 | Optical digital to analog converter An optical digital to analog converter having a plurality of input channels, each having the presence or absence of light representing the respective ones or zeros of a digital code, each of the input channels being coupled to a channel consisting of casc... | 10/12/1976 |
| 3949208 | Apparatus for detecting and correcting errors in an encoded memory word Apparatus for a digital memory system which performs single and double error detection and correction, as well as the detection of faults in the memory storage elements which do not produce errors in the data word stored therein. The data word is encoded ... | 04/06/1976 |
