Abstract: A substrate (110) for an unpackaged integrated circuit (IC) chip (118). The substrate comprises an insulative material (112), a plurality of contacts (114) disposed thereon, and a conductive ring (150) disposed around the outer perimeter of the contacts (114). Conductive traces (115) may be disposed around one or more contacts (114) and may be coupled to the conductive ring (150). An electro-less plating technique is utilized to plate contacts (114), avoiding unnecessary conductive material such as plating stubs being included in the contact (114) pattern, reducing interference. The conductive ring (150) shields the chip (118) from interference.

Abstract: A substrate (110) for an unpackaged integrated circuit (IC) chip (118). The substrate comprises an insulative material (112), a plurality of contacts (114) disposed thereon, and a conductive ring (150) disposed around the outer perimeter of the contacts (114). Conductive traces (115) may be disposed around one or more contacts (114) and may be coupled to the conductive ring (150). An electro-less plating technique is utilized to plate contacts (114), avoiding unnecessary conductive material such as plating stubs being included in the contact (114) pattern, reducing interference. The conductive ring (150) shields the chip (118) from interference.

Abstract: A head-mounted display system for the viewing of video or other sources of imagery which comprises a mechanism allowing for a wide range of adjustments for presenting the display to the wearer. The head mounted display device is supported by a headband or other support structure with three independent adjustments giving the wearer a wide range of adjustment capability. One pivot adjustment is in a location in proximity with the ear, the other pivot adjustment is located in close proximity with the pupil of the eye, and a third adjustment allows for the display unit to be adjusted in or out from the wearers head so as to permit convenient use with glasses. The mechanism allows the display to be located within or outside the wearer's primary field of view by utilizing these multiple adjustment locations for the system. The display unit consists of viewing optics, fold mirrors, liquid crystal display devices, and a backlight unit.

Abstract: An apparatus for automatically seal welding a tube to the inside surface of a header. A mandrel concentrically supports the apparatus from the tube to be welded and carries a rotating support which in turn carries a welding torch. Electric motors for rotating and oscillating the torch are located with their axis parallel to that of the mandrel. Weld spatter shields protect the interior of the tube and also the various drive mechanisms.

Abstract: A method and apparatus for removing a hollow tube from a tube sheet in which the tube is held by expansive forces in the tube. A GTA arc is established between an electrode and the interior tube wall. The arc parameters are such that it melts partially through the tube wall and the arc is then translated in a desired pattern of movement along the length of the tube contained in the tube sheet. Upon re-solidfication of the melted part of the tube the compressive forces of solidification shrinkage and thermal contraction result in a reduction of the tube diameter. Apparatus is disclosed for carrying out the method which, through a dual drive arrangement, is capable of producing a variety of weld head translation paths.