Abstract:
An object of the invention is to provide simple and convenient alignment between two mating form tools. The technical problem is the time consuming trial and error procedures frequently used to align mating tools with fine tolerances, for instance 0.025 mils. The invention solves the alignment problem by using a plurality of alignment members (22) extending upward from a surface (26) of one mating tool (14) so that the alignment members (22) engage in slidable contact with alignment tracks (32) formed in the edges of the other mating tool (14). In certain embodiments the alignment members (22) and tracks (32) can be formed in the four corners of rectangular mating tools, and the alignment members (22) can be cylindrical rods with dome shaped tops (30). The alignment is useful for tooling set-up as well as tooling usage. The principle use of the invention is for alignment between a punch (12) and lead form anvil (14) as they are brought together to form TAB tape outer leads (56) connected to an integrated circuit (54).
Abstract:
A method for promoting enhanced nondestructive reconstruction of holograms recorded in photorefractive media (10) involves control of the polarization states of the reconstruction beam (24) and the recording beams (24, 26), control of the cumulative recording energy, and use of a relatively high external field applied across the media (10) during recording which is subsequently reduced during reconstruction. The resulting reconstruction history characteristics are selectively tailored by adjusting the polarization and intensity of the reconstruction beam (24), the recording geometry, and the applied voltage (40) during reconstruction and recording, and various other parameters. In general, the reconstruction efficiency (48) starts at a relatively high level, initially reduces, and then subsequently grows above the starting values, and can be made substantially nondestructive over a typical reconstruction cycle, with erasure times exceeding forty-five minutes.
Abstract:
A fluid heat exchanger (10) for cooling an electronic component (16) including a housing (12) having a fluid inlet (18) and fluid outlet (20). Piezoelectric means (32, 34) are connected to a plurality of flexible blades (30) for pumping fluid from the inlet (18) to the outlet (20). A heat conductive structure is connected to the housing base (12) for conducting heat to the fluid. The heat conductive structure may include the flexible blades (30) and/or fixed metal fins (40).
Abstract:
A heat exchanger for cooling or heating an object, which heat exchanger (10) comprises a plurality of spaced apart substantially parallel thermally conductive fins (18, 20) characterized in that diverting means (26, 26 b , 26 e , 26 f , 58) are provided which, when a gas is introduced in one direction into said heat exchanger (10) diverts at least part of said gas in a second direction generally perpendicular to said one direction. In one embodiment, the heat exchanger (10) comprises two interdigitated sets of oppositely facing cooling fins (18, 20) which are of generally right-angled triangular configuration. Cooling air is introduced downwardly into the heat exchanger (10) from duct (16) and is diverted horizontally by the hypotenuse of the cooling fins (18, 20). The cooling air leaves the heat exchanger (19) in mutually opposite directions through the passageways (30) formed between adjacent fins in each set of fins. The heat exchanger (10) is particularly useful as a heat sink for use with electronic chips (12). Several other embodiments are described.
Abstract:
A field emission cathode includes a layer of conductive material (14) and a layer of amorphic diamond film (12), functioning as a low effective work-function material, deposited over the conductive material to form emission sites. The emission sites each contain at least two sub-regions having differing electron affinities.
Abstract:
A method is provided for fabricating a display cathode which includes forming a conductive line adjacent a face of a substrate. A region of amorphic diamond is formed adjacent a selected portion of the conductive line. The figure is an enlarged exploded cross-sectional view of a diode display unit (10) which includes two primary components: cathode plate (12) and anode plate (14). A vacuum is maintained between the plates by a seal (16). Regularly spaced pillars (26) separate cathode plate (12) and anode plate (14). A plurality of low effective work-function emitter areas (24) are formed by respective layers of amorphic diamond along conductive lines (20) disposed on substrate (18). A layer (34) of photo-emitting material is formed along transparent conductive lines (30) which are disposed upon substrate (28). Enlarge pads or leads (32) allow connection to an external signal source.
Abstract:
Forming a body (10) of insulating material with a shelf (14) and an opening (12) therethrough with a plurality of electrical conductors (16) extending from the shelf (14) to the exterior of the body. A plurality of tape automated bonding leads (26) are placed in the opening (12) in which the inner ends of the leads are connected together. The outer ends (28) of the leads are aligned with the electrical conductors (16) and bonded thereto and the inner ends (30) of the leads are disconnected from each other. An electronic component (50) is bonded to a bottom cover (52), aligned in the opening (12), and the inner ends (30) of the leads are bonded to the electrical component (50). The bottom (52) and a top cover (60) are sealably connected to the body (10) enclosing the opening and the electronic component.
Abstract:
A substrate (30) for attaching electrical devices (42) having an interconnect wiring structure (34) and a support (32) for the interconnect, the support having a number of vias (38), or throughholes, extending therethrough and electrically connected to the interconnect. The substrate allows for attachment of the electrical devices on the side of the support opposite the interconnect at the vias, rather than on the interconnect itself. By so doing, the chips can be packed more densely since the area between the chips normally reserved for engineering change pads, test pads and the like is not required, these functions being performed on the interconnect on the opposite side of the substrate.