Abstract:
An electron beam testing apparatus for applying an electron beam to parts of an electronic component and measuring the secondary electrons released from the part including a secondary electron collector having a plurality of vertically extending screens with a detector positioned adjacent one of the screens. A different voltage is applied to each of the screens of the collector for collecting the secondary electrons over a large area. The apparatus may include a combination blanking and Faraday cup for metering the electron beam current when it is blanked. The apparatus may also be used to measure net work capacitance by measuring the time required to charge a network to a predetermined voltage.
Abstract:
A method of making an electrical multilayer copper interconnect in which the electrical lines are protected by an electroplated overcoat. A plating interconnect is deposited on a substrate, a sacrificial layer of dielectric material is deposited on the plating interconnect. Thereafter a plating mask is formed on the dielectric material. Two self-aligned plating masks are patterned in one step, one of which is a plating mask for copper plating and the other is a plating mask for the overcoat. Preferably, before electroplating the overcoat, the copper is etched for exposing the sides adjacent the dielectric layer for allowing overcoating all of the copper.
Abstract:
A single point bonding apparatus and method for bonding one electrical conductor to a second electrical conductor by a thermosonic process using force, time, temperature and ultrasonic energy as the key parameters in forming the bonds. A bonding tool has a tip with a multiple of nonparallel surfaces extending from the end of the tip for maximizing the amount of ultrasonic energy coupled to the electrical conductors. The surfaces may be recessed into the end of the tip or protrude outwardly from the end of the tip for coupling ultrasonic energy in directions both parallel and perpendicular to the conductors.
Abstract:
A planarization method of fabricating a layer of metal conductors embedded in a dielectric level. A coating of aluminum is anodized from the top but leaving a thickness of unanodized aluminum on the bottom. The top is masked and etched to provide a predetermined bare area which is etched out down to the unanodized aluminum. A metal is plated to the unanodized aluminum equal to the thickness of the unexposed anodic aluminum. The mask is removed and the unanodized aluminum is anodized. Therefore, the layer of metal and the dielectric anodic aluminum are planarized. Another anodizable metal may be used as an undercoat layer for completing the anodizing of the aluminum.
Abstract:
A matrix-addressed diode flat panel display of field emission type is described, utilizing a diode (two terminal) pixel structure. The flat panel display comprises a cathode assembly having a plurality of cathodes, each cathode including a layer of cathode conductive material and a layer of a low effective work-function material deposited over the cathode conductive material and an anode assembly having a plurality of anodes, each anode including a layer of anode conductive material and a layer of cathodoluminescent material deposited over the anode conductive material, the anode assembly located proximate the cathode assembly to thereby receive charged particle emissions from the cathode assembly, the cathodoluminescent material emitting light in response to the charged particle emissions. The flat panel display further comprises means for selectively varying field emission between the plurality of corresponding light-emitting anodes and field-emission cathodes to thereby effect an addressable grey-scale operation of the flat panel display.
Abstract:
A system and method for producing thin, uniform powder phosphors for field emission display screens wherein a planarization of the phosphor powder layer is accomplished by placing the deposited phosphor layer in an anode plate between two optical flats, which are then mounted within a mechanical press.
Abstract:
Compliant electrically connection bumps for an adhesive flip chip integrated circuit device and various methods for forming the bumps include the steps of forming polymer bumps on a substrate or an integrated circuit die and coating the polymer bumps with a metallization layer. The polymer bump forming step includes the steps of coating a polymer material on a substrate, curing the polymer and the etching the bump pattern from the polymer material. The overcoating step includes electrolessly plating a ductile metal such as gold on the polymer bump.
Abstract:
A matrix-addressed diode flat panel display of field emission type is described, utilizing a diode (two terminal) pixel structure. The flat panel display includes a cathode assembly having a plurality of cathodes, each cathode including a layer of cathode conductive material and a layer of a low effective work-function material deposited over the cathode conductive material and an anode assembly having a plurality of anodes, each anode including a layer of anode conductive material and a layer of cathodoluminescent material deposited over the anode conductive material, the anode assembly located proximate the cathode assembly to thereby receive charged particle emissions from the cathode assembly, the cathodoluminescent material emitting light in response to the charged particle emissions. The flat panel display further includes the capability for selectively varying field emission between the plurality of corresponding light-emitting anodes and field-emission cathodes to thereby effect an addressable grey-scale operation of the flat panel display.
Abstract:
A three dimensional integrated circuit interconnect for connecting a plurality of chips in a module with a standard footprint for pin grid array or quad flat pack mounting. Each IC is mounted on a custom interconnect slice and tested. The slices are stacked together with electrical connections from one slice layer to the next. The module may use multi-layer ceramic slices or printed circuit board materials.
Abstract:
A method of forming an etch mask and patterning a substrate. The method includes directing a particle beam at a substrate without using a mask to deposit an etch mask on the substrate which selectively exposes predetermined portions of the substrate, the etch mask consisting of particles mechanically placed on the substrate by the particle beam, and then etching the exposed portions of the substrate through the etch mask to form channels therein. The process is well suited to fabricating high density copper/polyimide multi-chip modules.