Abstract: A ceramic chip carrier is disclosed which includes a ceramic substrate having a circuitized surface, at least one semiconductor chip mounted on the circuitized surface, and a lead frame or edge clip which is mechanically and electrically connected to contact pads on the circuitized surface. Each mechanical/electrical connection between the lead frame or edge clip and the contact pads includes a conventional solder connection. In addition, each such solder connection is at least partially encapsulated in a material, including an epoxy resin, which is chosen in relation to the solder connection to enable the solder connection to withstand a standard thermal fatigue test.

Abstract: A TAB (tape automated bonding) tape is disclosed which includes one or more openings, each adapted to receive a semiconductor chip, and electrical leads extending into each such opening. Significantly, this TAB tape also includes a device for preventing a semiconductor chip, positioned within a tape opening, from being lifted toward a bonding tool as a result of electrical leads adhering to the bonding tool, when the bonding tool is used to bond contact pads on the semiconductor chip to the leads extending into the opening.

Abstract: Method of providing a printed circuit board with a cover coat on a selected area thereof characterized by the steps of:i) applying a photoresist material to an area of the board not to be provided permanently with a cover coat;ii) applying a photosensitive material to both the photoresist and the area of the board to be provided with cover coat;iii) blanket exposing the board to light to promote reaction of photoresist material with photosensitive material only in areas in which the photosensitive material and photoresist interface;iv) removing the reaction product of photoresist material and photosensitive material from the interface areas; andv) curing the remaining photosensitive material to convert the cover coat.

Abstract: An improved method and apparatus for making solder connections from input/output connecting pins to the circuitry on a pinned metallized ceramic substrate. A solder preform in the shape of a sphere provides the correct volume of solder. These spheres are held in position at each desired joint by a templet. The substrate, solder sphere and templet assembly is passed through a furnace in a reducing atmosphere and at a temperature to facilitate solder reflow and wetting, thus creating a sound mechanical and electrical connection between the pin and its portion of the circuitry. The method and apparatus of the invention provides joints have a high degree of reliability such that all connections are made to acceptable soldering standards, none lacking integrity. Only harmless by-products are produced in the practice of the invention, and no residue is produced which requires cleaning by means of chemical solvents and therefore is environmentally superior.

Abstract: A new MSM photodetector, including a photoabsorbing layer of ternary or quaternary III-V compound semiconductor material, is disclosed. This new photodetector is significant because it exhibits a relatively small dark current and a correspondingly large signal-to-noise ratio. Moreover, the photodetector is readily integrable with electronic integrated circuits and is relatively easy to fabricate.

Abstract: Systems for transmitting and/or receiving electromagnetic signal radiation are disclosed. The inventive systems are distinguished from previous such systems in that each includes at least one resonant cavity comprising a housing containing a body, e.g., a cylindrical or helical body, of relatively high T.sub.c superconducting material. Significantly, this body is fabricated using a new, unconventional procedure. As a result, the body exhibits substantially lower surface resistances than either previous such bodies of relatively high T.sub.c superconducting material, fabricated using conventional procedures, or bodies of copper, at 77 Kelvins and at frequencies ranging from about 10 MHz to about 2000 MHz. Moreover, as a consequence, the resonant cavity containing the unconventionally fabricated body exhibits much higher quality factors, Q, at the above temperature and frequencies, than previous such cavities containing either conventionally fabricated bodies of relatively high T.sub.

Abstract: In a liquid crystal projection t.v. system the color gradient over the projected image, which is due to angular sensitivity of the dichroic mirrors, is minimized by introducing a field lens (61,62,63) next to the light values or LC-panels (21, 22, 23) in the light paths of the blue (b.sub.B), green (b.sub.G) and red (b.sub.R) beams. By chosing different length light paths before and after the light valves and LC-panels a difference in angular sensitivity of the separation mirror (41,42) and the recombination mirrors (52,53) can be compensated for.

Abstract: A device for the continuous measurement of the thickness of layers which are deposited on a substrate at low pressure, comprising a light source and two light conductors. Both light conductors are present in a pipe closed at one end by an optical window. Said end has an exchangeable sleeve which at one end comprises an optical window and which can be slid so as to fit the pipe in which the light conductors are present.

Abstract: A projection lens system for projecting a magnified image from an image source (3, 4, 5) on a projection screen (10) comprises from the image end successively a first, positive lens group (L.sub.1) and at least a second, negative lens group (L.sub.3) whose surface (S.sub.6) facing the image end is concave. The first lens group consists of a single lens element (L.sub.1) which in addition to a first refractive surface (S.sub.1) facing the image end and a second refractive surface (S.sub.2) facing the object end has a third radiation-reflecting surface (S.sub.3) which is located between the first and the second surface.

Abstract: A first device region (20) of one conductivity type is provided adjacent one major surface (11) of a semiconductor body (10). A layer (30) doped with impurities of the opposite conductivity type is provided on the one major surface (11) for forming an extrinsic subsidiary region (41) of a second device region (40) of the opposite conductivity type. An opening (31) is formed through the doped layer (30). Impurities for forming a coupling region (43) of the opposite conductivity type are introduced through the opening (31) prior to defining an insulating first portion (50) on the side wall (32) of the doped layer (30) to form a first window (80). Impurities for forming an intrinsic subsidiary region (42) of the second device region (40) are introduced through the first window (80).

Abstract: A projection-lens system for projecting a magnified image of a scene formed by means of a reproduction element onto a projection screen, which system has two correction groups and one main group which provides substantially the entire power of the system. The main group includes a glass preform of which at least one of the outer surfaces is provided with a layer of a transparent plastics having an aspheric outer profile. This projection-lens system is substantially temperature-independent, provides a satisfactory correction for aberrations, and has a short focal length and a comparatively large numerical aperture.

Abstract: An optical scanning device comprises a rotatable polygon mirror (40), or another deflection system, which is arranged between an objective system (30) and the surface (61) to be scanned. In order that the image point (21) moves along a straight line across the surface (61), a correction system is provided which comprises two unidirectionally curved mirrors (51 and 52), the first (51) of which has a hyperbola-cylindrical shape and the second (52) has a parabola-cylindrical shape.

Abstract: A domestic vibration apparatus, in particular a dry-shaver or hair trimmer, in which rotary movements of a two-pole permanent magnet (9) forming a rotor are converted into vibratory movements of a vibration tool by means of a lever system (13) which preloads the drive in such a way that the rotor (9) can oscillate about a rest position,t he two-pole permanent-magnet rotor (9) without pole-pieces being arranged in the U-shaped stator of a single-phase synchronous motor.

Abstract: An electrical multi-pole machine comprises a stator (1) having a soft-magnetic outer body (7) with permanent magnets comprising pole faces (9A-9D, 10A-10D, 11A-11D) arranged along a circular path, a rotor (3) which is coaxial with the stator and which comprises a soft-magnetic inner body (13) with teeth (15-22) comprising regularly spaced tooth surfaces (15A-22A) disposed along a circular path and which cooperate with the pole faces via an air gap (23), at least three active coils (29, 30, 31), and a machine shaft (5). The pole faces are arranged in groups, at least three groups (9, 10, 11) of magnets being provided, which groups are spaced from each other by coil slots (25, 26, 27) in which coil sides (29A, B, 30A, B, 31A, B) of the active coils are accommodated. Adjacent pole faces in each of said groups have opposite polarities.

Abstract: For stereoscopic display arbitrarily formed sub-pictures (for example divided into columns) are mixed. This is possible by covering a light-sensitive pick-up unit (CCD) (23) on which the sub-pictures are projected with an LCD (21) in such a way that a 1:1 relation is created between pixels and storage elements. A polarizer (22) arranged between the pick-up unit (23) and the liquid crystal (21) passes sub-pictures determined by electrodes (26, 27), which sub-pictures are read by the pick-up unit. On the display side the sub-pictures are read via an LCD (36) and combined in an analogous manner to a (stereoscopic) overall picture.

Abstract: An image sensor device of the frame transfer type comprises a substrate having a first region (10) of a first n type, a second region (12) of the opposite p-type and charge transfer channels (15) as well as an arrangement of electrodes (1A . . . 1D) of charge transfer.A photosensitive layer (50) is arranged on the surface (19) of the substrate and has window regions (100, 200) in electrical contact with the channels (15) through windows (40) provided in the arrangement of electrodes, for example through electrodes (1B, 1D). Insulating strips (24) and conductive strips (30) serve to prevent the drift from one window region to the other of charges to be transferred and to evacuate the charges of a sign opposite to that of the charges to be transferred.

Abstract: Device is provided for reading information from a magnetic recording medium, comprising a SQUID (15), a magnetic yoke formed from two flux guides (3 and 5) and a face (13) for magnetic flux coupling of the SQUID with the magnetic recording medium. The SQUID is provided with connection means (33) for a detection circuit (35).

Abstract: "Method and device for aligning and storing in a given order moldings having a tubular perforation."Individual moldings (6) are introduced successively from above into a turbulence space above a receiving mandrel (5) profiled for reception in the perforation (7) in the molding (6). Each molding is subjected to an aligning air turbulence until the molding (6) has been aligned with its perforation (7) with respect to the receiving mandrel (5) in such a manner that the molding (6) falls onto the receiving mandrel (5) due to an air resistance decreasing as a result of the alignment. The receiving mandrel (5) then passes the molding (6) on to a deposition transport rail (19).

Abstract: A motor-compressor unit comprising a vibration motor (1) having a single-part magnetizable stator (2) in the form of a W, arcuate air gaps (9, 10) being formed between the peripheral surface (6) of the central limb 3 of the W and each of the outer limbs (4, 5) of the W, and an armature (11) which is reciprocatingly pivotable about a motor shaft (12). The armature comprises at least one permanent magnet pole element (13), at least one coil (16, 17) arranged on the stator, an alternating current through the coil producing an oscillating movement of the armature (11), a compressor (21) having a linearly reciprocating piston (24) which is coupled to the armature (11), the coupling (25) being arranged diametrically opposite the pole element (13) relative to the motor shaft (12).

Abstract: Deflection unit mounted around a display tube for deflecting electron beams across the display screen includes a line deflection coil and a field deflection coil. A compensation coil system for generating a magnetic compensation field oppositely directed to the line frequency radiation field in a space in front of the display screen includes core means of a magnetizable material positioned between the display screen and the deflection unit in a plane parallel to the display screen and two diametrically arranged coils each having at least one turn.