Abstract:
A field emitter device formed by a veil process wherein a protective layer (64/66) comprising a release layer (64) is deposited on the gate electrode layer (62) for the device, with the protective layer overlying the circumscribing peripheral edge of the opening of the gate electrode layer, to protect the edge of the gate electrode layer during etching of the field emitter cavity (72) in the dielectric material layer (30) on a substrate, and during the formation of a field emitter element (40) in the cavity by depositing a field emitter material through the opening. The protective layer is readily removed subsequent to completion of the cavity etching and emitter formation steps, to yield the field emitter device. Also disclosed are various planarizing structures and methods, and current limiter compositions permitting high efficiency emission of electrons from the field emitter elements at low turn-on voltages.
Abstract:
A microelectronic field emitter device (50) comprising a substrate (78), a conductive pedestal (64) on said substrate, and an edge emitter electrode on said pedestal, wherein the edge emitter electrode comprises an emitter cap layer (66) having an edge (68). The invention also contemplates a current limiter for a microelectronic field emitter device, which comprises a semi-insulating material selected from the group consisting of SiO, SiO+Cr (0 to 50 wt.%), SiO2 + Cr (0 to 50 wt.%), SiO + Nb, Al2O3 and SixOyNz sandwiched between an electron injector and a hole injector. Another aspect of the invention relates to a microelectronic field emitter device comprising a substrate (240), an emitter conductor (242) on such substrate, and a current limiter stack (244) formed on said substrate, such stack having a top (246) and at least one edge (248, 250), a resistive strap (266) on top of the stack, extending over the edge in electrical contact with the emitter conductor; and an emitter electrode on the current limiter stack over the resistive strap.
Abstract:
A planarization method for use during manufacture of a microelectronic field emitter device (50), comprising applying a glass frit slurry including glass particles in a removable base, and subsequently baking to liquify the frit (300). The invention relates in another aspect to a method of making a microelectronic field emitter device, comprising the steps of: applying a patterned layer of liftoff profile resist over a substrate (326) to define emitter conductor locations; employing the patterned resist layer to form trenches (324) in the substrate at the emitter conductor locations; depositing emitter conductor metal in the trenches and over the patterned resist layer; removing the patterned resist layer; depositing a current limiter layer (334) over the conductors (322) and substrate areas between trenches; depositing a layer of emitter material; pattern masking and etching the layer of emitter material to form emitter structures (330); depositing gate dielectric; applying a patterned layer of liftoff profile resist over the gate dielectric; evaporating gate metal; and removing the patterned resist layer to define gate electrodes (332).