Abstract: A bipolar junction transistor (BJT) requires the fabrication of a BJT structure and of a support post which is adjacent to, but physically and electrically isolated from, the BJT structure. The BJT structure includes a semi-insulating substrate, a subcollector, a collector, a base, and an emitter. Metal contacts are formed on the subcollector and emitter to provide collector and emitter terminals. Contact to the structure's base is accomplished with a metal contact which extends from the top of the support post to the edge of the base nearest the support post. The contact bridges the physical and electrical separation between the support post and the base and provides a base terminal for the device. The base contact need extend over the edge of the base by no more than the transfer length associated with the fabrication process. This results in the smaller base contact area over the collector than would otherwise be necessary, and a consequent reduction in base-collector capacitance.

Abstract: A BJT device configuration includes an emitter finger and via arrangement which reduces emitter finger width, and is particularly suitable for use with compound semiconductor-based devices. Each emitter finger includes a cross-shaped metal contact which provides an emitter contact; each contact comprises two perpendicular arms which intersect at a central area. A via through an inter-level dielectric layer provides access to the emitter contact; the via is square-shaped, centered over the center point of the central area, and oriented at a 45° angle to the arms. This allows the via size to be equal to or greater than the minimum process dimension, while allowing the width of the emitter finger to be as narrow as possible with the alignment tolerances still being met.

Abstract: A tip (10) for the dispensing of materials includes a housing (11) having first and second chambers (12, 13) contained therein. The chambers (12, 13) communicate with a mixing reservoir (19) and a hollow barrel (21). The hollow barrel (21) has an output orifice (51) and is in fluid communication with the mixing reservoir (19). Disposed within hollow barrel (21) is a static mixing device (30).

Abstract: A package (10) for the storage and dispensing of a plurality of materials includes a first and a second longitudinally juxtaposed barrels (11, 12). Each barrel (11,12) having a first and a second end (20, 21). Each first and second barrels (11, 12) having a quantity of at least one of the materials initially contained therein, and each barrel having an open end (20) and a dispensing end (21). A sealing plunger (40) disposed in each barrel (11, 12) such that the material in each barrel (11, 12) is initially positioned between the dispensing end (21) of the barrels (11, 12) and the respective ones of the sealing plungers (40). A snap cap (23) is contiguously formed to initially close each of the dispensing ends (21) of the barrels (11, 12), such that the snap cap (23) may be broken from the barrels (11, 12) to thereby forming a secondary open end (22) at the dispensing end (21) of the barrels (11, 12), thereby facilitating the material contained in each barrel (11, 12) to flow through and be dispensed.

Abstract: A package (10) for the storage and dispensing of a plurality of materials includes a first and a second longitudinally juxtaposed barrels (11, 12). Each barrel (11,12) having a first and a second end (20, 21). Each first and second barrels (11, 12) having a quantity of at least one of the materials initially contained therein, and each barrel having an open end (20) and a dispensing end (21). A sealing plunger (40) disposed in each barrel (11, 12) such that the material in each barrel (11, 12) is initially positioned between the dispensing end (21) of the barrels (11, 12) and the respective ones of the sealing plungers (40). A snap cap (23) is contiguously formed to initially close each of the dispensing ends (21) of the barrels (11, 12), such that the snap cap (23) may be broken from the barrels (11, 12) to thereby forming a secondary open end (22) at the dispensing end (21) of the barrels (11, 12), thereby facilitating the material contained in each barrel (11, 12) to flow through and be dispensed.

Abstract: A tip (10) for the dispensing of materials includes a housing (11) having first and second chambers (12, 13) contained therein. The chambers (12, 13) are separated by a plenum (14) and each has an input (15, 16) and an output (17, 18) orifice. The output orifices (17, 18) communicate with a mixing reservoir (18) and a hollow barrel (21). The hollow barrel (21) has an output orifice (51) and is in fluid communication with the mixing reservoir (18). Disposed within hollow barred (21) is a static mixing device (30).

Abstract: A printed wiring board is adapted to be mounted to a chassis using a fastener. The chassis provides an electrical ground for the printed wiring board. The board includes first and second sides and a mounting aperture extending therethrough for receiving the fastener. A plurality of spaced apart solder pads are disposed on one side of the board and adjacent to the mounting aperture. The pads are adapted to provide an electrical connection to the chassis. At lease one aperture is disposed in each of the plurality of pads. The aperture is plated creating an electrical connection between the sides of the board.

Abstract: A microscope drape fabricated from a thin soft, relatively inexpensive, plastic film which will melt at temperatures considerably lower than the temperatures which are developed by the illuminating lamp of an operating microscope, is provided with a heat barrier loosely secured to and carried by the inner surface of that portion of the film which, but for the presence of the barrier would be adversely affected by the temperatures induced within the drape adjacent the illuminating lamp of the drape-enshrouded microscope.