Abstract: A layered structure comprising wiring layers and polyimide layers is formed on a ceramics board and a layered structure comprising wiring layers and polyimide layers is formed on an aluminum board. Both the structures are bonded together through adhesives to bring metal bumps formed on the former structure into electric contact with metal bumps formed on the surface of the latter structure and thereafter the aluminum board is removed.

Abstract: A multilayer interconnection substrate having, e.g., first to third power interconnections provided with first to third interconnection layers. A first insulating layer is provided between the first and second interconnection layers, and a second insulating layer is provided between the second and third interconnection layers. A plurality of first via holes are provided at said first insulating layer and connect the first and second power interconnections and a plurality of second via holes are provided at said second insulating layer with their position being shifted from that of the first via holes and connect the second and third power interconnection.

Abstract: A polyimide multilayer wiring board is constructed by using a plurality of laminated blocks each of which has a plurality of wiring layers and interlaminar insulating layers of polyimide. On a base block having a substrate, the other blocks are laid on top of another, bonded to each other with a polyimide used in each block or another adhesive and electrically connected to each other by using, for example, metal bumps formed on each block. Each of the blocks except the base block is formed on a temporary substrate, and the temporary substrate is removed after bonding each block to the base block or precedingly bonded blocks. This multilayer wiring board can be produced in a shortened time with increased yield.

Abstract: A magnetic head drum of a helical-scan type for video data recording and reading apparatus comprises upper and lower stationary drums securely mounted on a spindle, an intermediate member rotatably supported on the spindle between the drums, and a motor for rotating the intermediate member. The motor comprises a rotor secured to the intermediate member, a stator secured to the upper drum, and a back yoke connected with the rotor through a back yoke retainer such that the stator is interposed between the rotor and the back yoke. This arrangement of the magnetic head drum contributes to effective damping of an electromagnetic noise of the motor caused due to vibration of the stator and back yoke.

Abstract: A tape supplying and taking up apparatus is capable of use with either large or small size tape cassettes containing reels which can be of different diameters and rotated with a high degree of accuracy by reel spindles of simple structure. Each tape cassette for use with the apparatus has a shutter of the slide type for closing access holes in the bottom wall of the cassette casing.Each of the reel spindles has a large size cassette receiving portion for receiving a tape reel of a large size tape cassette coaxial with a small size cassette receiving portion for receiving a tape reel of a small size tape cassette. The small size cassette receiving portion is smaller in diameter and disposed at a higher position than the large size cassette receiving portion. The diameter of a lower end of a reel spindle engaging hole provided in each reel hub of the small tape cassette is smaller than the outer diameter of the small size cassette receiving portion of the reel spindle.

Abstract: The invention relates to such semiconductor devices comprising: a wiring layer with a predetermined pattern formed over a major surface of a semiconductor substrate through an insulating film, a diffusion layer formed under a contact hole formed in said insulating film in an adjacent region of the wiring layer, and a conductive layer deposited into said contact hole in a state of being connected to said wiring layer.

Abstract: A focusing apparatus for a projection television comprises a lens barrel with lenses therein having a pair of shaft-like guide protrusions at symmetrically opposite positions on the lens barrel. A cylindrical barrel support member receives and holds the lens barrel in a proper, focused position. A pair of shaft-like guide slots, inclined along the axial direction of the supporting member, receive and guide the guide protrusions as the barrel is rotated within the support member to thereby achieve focusing. Axial ribs are on the outer surface of the support member and axial protrusions are on the inner surface at corresponding positions. A tightening ring or band encircles the support member and engages and presses the ribs resulting in the axial protrusions being pressed against and locking the lens barrel.

Abstract: A three-tube color projection television. The outside projection optics are arranged so that a single part can be produced for use in projection televisions of diverse screen size. An image surface correcting lens is at a fixed angle with respect to the face of a projecting tube. The fixed angle corresponds to the Scheimpflug angle of one screen size. A focusing lens is at an adjustable angle with respect to the image surface correcting lens, thereby allowing overall angle adjustment and use of the part in projection televisions of diverse screen size.

Abstract: A triple tube type projection television projects images of blue, green and red projecting tubes onto a screen by lenses disposed in front of the respective projecting tubes, and synthesizes the images by the three projecting tubes on the screen to provide a color image. The projection television comprises a device for offsetting intersection points between the screen and the optical axes of lenses on both sides of a central lens outside from the intersection point between the screen and the optical axis of the central lens; and a device for dislocating the centers of the projecting tubes on both sides outside from the optical axes of the lenses thereof.

Abstract: An integral type lens for use with a projection TV is composed of a first lens having a rim in the outer circumference thereof and a second lens disposed within the rim of this first lens. The integral type lens comprises a plurality of slanting faces inclined with respect to a tangential line at an equal distance from a lens center on either one of an inside face of the rim of the first lens and an outside face of the second lens, and contact pieces contacting the plurality of slanting faces on the other of the inside face of the rim of the first lens and the outside face of the second lens. The slanting faces and the contact pieces are engaged with each other to conform the optical axes of the first and second lenses to each other.

Abstract: A screen for a rear projection type television set including a Fresnel sheet and a lenticular sheet. Horizontal diffusion of projection light is carried out by a plurality of lenticular lenses which are arranged on the incident surface of the lenticular sheet in parallel with black stripes arranged on the emergent surface of the lenticular sheet. Vertical diffusion of the projection light is effected by a plurality of spherical or aspherical lenticular lenses which are arranged on the incident surface of the Fresnel sheet in a direction perpendicular to the pitch direction of the lenticular lenses formed on the lenticular sheet. This configurations provides a large visual field angle in both the horizontal and vertical directions.

Abstract: A prism system is disclosed which employs at least one solid or liquid filled prism element optically coupled to at least one plate like member which forms a total reflection surface or a dichroic mirror. In one embodiment the prism is molded from transparent plastic, e.g., PMMA or polystyrene, and in another embodiment the prism is molded from glass. In the case where a liquid is used, the liquid may be glycerol or a mixture of glycerol and ethyleneglycol. The prism is useful for a projection television set.

Abstract: A temperature-compensated lens system of positive power includes a plastic lens having a convex surface, and a liquid lens of negative power made of a liquid or gel material and held against the convex surface of the plastic lens, the liquid lens having a temperature coefficient dn/dT ranging from -4.times.10.sup.-4 to -2.0.times.10.sup.-4 /.degree.C. indicating the temperature-dependent variation in the refractive index of the liquid lens. The lens system is highly resistant to temperature-dependent variations.

Abstract: A projection television receiver comprises at least one cathode ray tube for receiving video signals and projecting images therefrom, the tube including a face; a lens mounted adjacent to the face for focusing the images projected by the tube; and a coolant disposed between the lens and the face for absorbing and dissipating heat from the tube, the coolant means including 1,3-butylene glycol.

Abstract: A projection apparatus for a projection television receiver comprises a projection tube for receiving video signals and projecting images therefrom; a lens aligned for focusing images from the tube; a frame for supporting the tube in alignment with the lens and defining a cooling chamber between the lens and the tube; a first seal to seal the lens to the frame under substantially uniform pressure with no substantial bending stress on the lens; and a second seal to seal the tube to the frame under substantially uniform pressure.

Abstract: A projection lens system is disclosed which comprises in order from a screen side, a first lens unit having a positive focal length, a second lens unit having a negative focal length, a third lens unit having a positive focal length, a fourth lens unit having a positive focal length and a fifth lens unit having a negative focal length and a concave surface directed toward the screen side. The first and second lens units being made of plastic. At least one of lens surfaces of the first and second lens unit is aspherical. At least one of lens surfaces of the third and fourth lens units is aspherical. The fifth lens unit is made of plastic and at least one of lens surfaces of the fifth lens unit is aspherical.

Abstract: A multilayer wiring substrate for mounting a plurality of electronic circuit elements wherein individual wiring layers are separately by insulating layers of an organic material. A plurality of contact pads are formed on the uppermost insulating layer and are connected to wiring members by pressure bonding at least one ceramic buffer member is provided beneath the contact pads to prevent pressure applied during bonding from affecting the wiring layers.

Abstract: A cooling system for a projection television receiver, the receiver having at least one cathode ray tube with a face thereon, comprising a lens for focusing light exiting from the tube; a frame supporting the lens in alignment with the face of the tube for defining a cooling chamber between the lens and the face with a fluid therein; and seals for sealing the tube and the lens to the frame in a fluid-tight manner and essentially preventing gas from the fluid sealed in the chamber from exiting the chamber. The seals are preferably of a material which is essentially, impermeable to the passage of the gas, such as co-vulcanized ethylene propylene rubber and polydimethyle siloxane.

Abstract: A projection-type television receiver comprising right, left and center projection tubes each having a face, the images on the faces of the right and left tubes being formed in registry with the center of each corresponding face for minimizing keystone distortion and maximizing luminance in the receiver, and a transmissive screen for displaying a composite picture of images from the tubes. A lens corresponding to each tube focuses the images from the tube to form a coincident image, and mirrors reflect the coincident image onto the screen for viewing. A particular arrangement of the lenses is described for substantially uniform luminance on the screen and for a substantially symmetrical temperature distribution on the faces of the tubes.

Abstract: A projection television receiver comprises at least one cathode ray tube for receiving video signals and projecting images therefrom, the tube including a face; a lens mounted adjacent to the face for focusing the images projected by the tube; and a coolant disposed between the lens and the face for absorbing and dissipating heat from the tube, the lens and the coolant having substantially the same refractive index for reducing reflection. The coolant may be a mixture of glycerol and ethylene glycol including about 20 to about 40% by weight of glycerol.