Abstract:
Integrated circuit having a guard ring Schottky barrier diode therein in which first and second layers of metallization are provided overlying the Schottky barrier diode which are brought into intimate contact with the interconnect surface to establish intimate contact between the surface of the semiconductor body and the metallization.
Abstract:
A bonding pad substructure in a semiconductor device prevents injection of minority carriers into the substrate during negative overvoltages applied to the bonding pad. An N-type isolated region is provided in a P-type substrate. A P-type region is provided within the N-type region, subtending the metal bonding pad which is on an oxide layer on the substrate. Shorts between the bonding pad and the semiconductor which may occur at defects in the oxide layer are thus limited to the P-type region, and negative overvoltages on the bonding pad reverse bias the PN junction so that deleterious injection of electrons from the Ntype region into the substrate cannot occur.
Abstract:
A beam-lead semiconductor component is, for example, a beam-lead Schottky diode, which includes a Schottky metal-semiconductor contact structure with one additional non-blocking contact structure. The semiconductor structure is formed with regions of different doping levels but of the same conductivity type having an insulating layer thereover which contains openings at at least two points, the two openings being over the regions of the different doping levels respectively and the region of lesser doping being formed in the upper surface of said other region. The regions exposed below said opening are provided with metal layers respectively. Contacts extend down into the openings into electrical contact with said metal layers respectively. These contacts come from correction with beam lead terminals which are provided on the surface of the insulating layer. The beam lead connections extend out from the component so that the semiconductor arrangement can be soldered in a self-supporting fashion directly into circuits. This avoids the occurrence of housing capacitances which do occur, for example, in the case of encapsulated diodes. The contact extending into the opening to the region of higher doping level is spaced from the region of lower doping level, with insulating material being therebetween. An ohmic contact is formed on the underside of the region having the higher doping level.
Abstract:
A pressure sensitive bidirectional switching semiconductor device comprising a semiconductor substrate consisting of a semiconductive material such as silicon and of an additive of a deep energy level impurity, a surface of the semiconductor substrate having at least two projections of a mesa type, and separate electrodes provided on the surfaces of the semiconductor substrate so that the resistance measured between the separate electrodes may be varied in response to a pressure applied to the projections through the electrodes on the projections by means of a flat plate.
Abstract:
A multilayer interconnected structure is composed of a first patterned layer formed on a semiconductor substrate, through an SiO2 film where necessary, lands, trapezoidal in cross section, which are formed on the first patterned layer to connect the latter to another patterned layer to be formed thereon, a thermosetting polymer layer applied on the first layer to a thickness up to the surface of the trapezoidal lands, and a second patterned layer spread over the resin layer and electrically connected to the trapezoidal lands. By this fabrication technique a multilayer interconnected structure is obtained which has a minimum of steps in its individual patterned layers and possesses desirable inter-layer insulation characteristics.
Abstract:
A semiconductor device having a Schottky barrier junction formed in the bottom of a polygonal recess on a surface of a semiconductor substrate comprises an undercut in the recess beneath an insulating mask formed on the substrate, and a metal passing through the mask and extending to the bottom of the recess for forming said junction. The undercut provides an enclosed spacing encircling the junction portion of said metal and said semiconductor, thereby improving the backward breakdown voltage characteristic therein.
Abstract:
An RF transistor has base and collector regions and a plurality of discrete emitter segments extending into the base region. A highly conductive intermetallic, such as PtSi grid extends into the base region and individually surrounds each emitter segment. The highly conductive intermetallic, such as PtSi grid is separated from the collector region by a highly resistive grid of the same conductivity type as the base region.
Abstract:
A method is disclosed for batch forming extended beam leads to the pads or contact areas of a solid state device (e.g., monolithic integrated circuit hybrid integrated circuit, discrete device) whereby external connections to the device may be made. The process involves depositing a metal or a plurality of metals over the device in a predetermined manner with the metal adhering to the device contact area but only weakly, if at all, adhering to the remainder of the surface. The device is separated by backside scribing which leaves the beams extending from the contact area of each device.
Abstract:
A diffused resistor for semiconductor integrated circuits which avoids the problems caused by the high surface current density. The resistor includes at least one semiconductor region of conductivity type opposite to the resistor proper located between a pair of ohmic contacts to the resistor region. This semiconductor region diverts the current flow from the surface of the resistor region and causes a more uniform current distribution across the surface of the ohmic contacts.
Abstract:
A coplanar semiconductor switch structure comprises a pair of electrodes deposited as a film on a suitable substrate with a gap formed between the ends of the electrodes, and an active semiconductor material deposited as a film in the gap between the ends of the electrodes. The ends of the deposited electrodes are so formed as to provide a minimum gap distance therebetween with increasing gap distance on each side thereof to provide a preferred location for the conducting path or paths through the active semiconductor material between the electrodes. The film thickness of the deposited acting semiconductor material is greater than the largest transverse dimension or diameter of the conducting path or paths so to be totally confined in the material. The active semiconductor material may be made to extend substantially equally from each side of the gap between the electrodes so that the current conducting path or paths may be symmetrical about an axis between the electrodes.