At least two overlapping or crossing levels of electrically isolated conductors are used to interconnect regions of a microelectronic device. To minimize shorts at regions of overlap or crossing, the lower conductor is provided with a pronouncedly trapezoidal cross section to facilitate maintenance of a uniform thickness of insulation between the two conductors. To achieve this cross section, the lower conductor is made of a material which etches slower in the thickness direction than in the dir...

A laminated board made of two sheets of aluminum and providing closed conduits for transmitting fluid pressures between pneumatic components secured to the board. One sheet is press-formed to provide groovelike channels; the other sheet is sealed to the first sheet and is formed with connection holes leading to the passages defined by the press-formed channels. The two sheets are bonded together by an epoxy preform having a configuration matching that of the circuit board and sealing the passage...

A device for interconnecting a plurality of integrated circuit ceramic substrate pairs via common printed circuit boards substantially comprises a frame having the boards attached thereto in parallel spaced relationship to each other and perpendicular to the individual substrates. Associated with each substrate pair to form a module are first and second camming members and first and second backing plates, each plate being directly adjacent to and in intimate contact with its associated substrate...

Interconnecting rectangular freight containers in a container stowage system having one or several tiers of containers in order to prevent relative movement horizontally and provide for variation in container spacing. This is accomplished by the use of interlock stacker units, and spacer plates or bridge fittings and, for the top tier, locking pins to secure or capture the spacer plates.

An interconnection device for telephonic circuits automatically restores to a two-wire configuration telephonic signals applied to a multiple wire telephone interface circuit. Supervision, polarity, and/or alert signals distributed by an interface in the form of multiple circuit closures are reproduced in the form of two-wire signals made available to customer-owned equipment. The interconnect device permits duplex services between the premises of the customer user and outside locations reached ...

In an interconnection bus system, a first impedance network connects at one end of the bus in parallel with a termination provided by a master unit. The termination includes a load impedance for terminating the bus in its characteristic impedance in series with a voltage source for supplying power to the control circuits of a series of devices tapped at different points along the length of the bus. The last device in the series connects to the other end of the bus and includes a second impedance...

A selective interconnections matrix is provided of reduced dimension compared with existing known arrangements, and enabling sufficient interconnections to be made for practical application. It has been observed that a normal 100 matrix is usually employed for only 500 or so connections out of the 10,000 possible, and by terminating each connector in a series of contacts interconnected by flexible links, a sufficient number of interconnections has been maintained, while at the same time providin...

Units of a data processing system communicate on a ring connection of shift register stages. The number of stages in a shift register is made small to avoid the delays that accompany the long data paths of a large ring system. Interconnecting stages are provided to direct a message on a first ring to a second ring according to an address contained in the message. Several useful configurations are disclosed. With this arrangement, a system of small rings can be expanded without correspondingly le...

A process wherein numerous identical or similar cells are formed into a continuous chain of such cells on a single semiconductor wafer is shown. The cells are cataloged as either good or bad cells and then a layer of dielectric followed by a pattern of conductors is deposited over all of the cells. Connections are discretionarily made to the good cells by omitting to etch holes through the dielectric layer over the contacts of bad cells and by shorting across all cells and then removing the shor...

An electrical matrix board of dielectric material having a printed circuit defined upon two surfaces thereof and including a plurality of metallic terminals defined thereon in a plurality of sets, the terminals being related such that each set includes a central terminal surrounded by secondary terminals arranged in a hexagonal configuration, and the distance between adjacent secondary terminals defining a set, and between such secondary terminals and the associated primary terminal being equal....