Abstract:
A novel sub-structure of a thick film dielectric electroluminescent display and a thick film dielectric electroluminescent display incorporating the same is provided. The sub-structure comprises a barrier layer between a substrate and a thick film dielectric layer. The barrier layer is chemically inert with respect to the substrate and the thick film dielectric layer and the barrier layer inhibits diffusion of at least one chemical species therethrough. This sub-structure results in a higher capacitance for the thick dielectric layer, which provides higher display luminance and a reduced tendency for dielectric breakdown of the thick dielectric layer. The barrier layer permits for lower cost substrates, such as glass, to be used.
Abstract:
A single longitudinal-mode laser includes a first mirror and a second mirror that define a laser cavity therein that does not include a linear polarizer. A birefringent gain medium can generate a lasing light at a lasing wavelength along a light propagation direction in response to a pump light at a pumping wavelength. The birefringent gain medium has an optical axis substantially perpendicular to the light propagation direction. A first wave plate positioned between the first mirror and the birefringent gain medium is a quarter wave plate at the lasing wavelength and a whole wave plate at the pumping wavelength. A second wave plate is positioned between the birefringent gain medium and the second mirror. The first wave plat and the second wave plate in part produce a single longitudinal mode in the lasing light.
Abstract:
One or more features of multiple patterned layers formed on a semiconductor are determined by obtaining a first measured diffraction signal measured from a first patterned layer before a second patterned layer is formed on top of the first patterned layer. One or more features of the first patterned layer are determined using the first measured diffraction signal. Values of one or more profile parameters of a hypothetical profile of the second patterned layer in combination with the first patterned layer are fixed. A second measured diffraction signal measured from the second patterned layer after the second patterned layer has been formed on top of the first patterned layer is obtained. One or more features of the second patterned layer are determined based on the second measured diffraction signal and the fixed values of the one or more profile parameters.
Abstract:
The present invention is a low firing temperature, composite thick film dielectric layer for an electroluminescent display. The composite thick film dielectric layer comprises; (a) a lower zone layer of a thick film composition comprising; one or more of lead magnesium niobate (PMN), lead magnesium niobate-titanate (PMN-PT), lead titanate, barium titanate and lead oxide; and a glass frit composition comprising lead oxide, boron oxide and silicon dioxide; (b) an upper zone comprising at least one layer of lead zirconate titanate (PZT) and/or barium titanate; and (c) an intermediate composite zone comprising a composite of (a) and (b).
Abstract:
A method for the in situ cleaning of a semiconductor deposition chamber utilized for the deposition of a semiconductor material such as titanium or titanium nitride comprising, between wafers, introducing chlorine gas into the chamber at elevated temperature, purging the chamber with an inert gas and evacuating it before introduction of the next wafer. A two-stage between wafer cleaning process is carried out by introducing chlorine into the chamber at elevated temperature, thereafter initiating a plasma without removing the chlorine, purging the chamber with an inert gas and evacuating it before introduction of the next wafer. In a preferred embodiment, a thin protective film of titanium is deposited on the inner sur aces of the chamber prior to utilizing the chamber for he deposition of such material. The protective layer is replenished following each two-stage cleaning.
Abstract:
Tungsten carbide and/or tungsten can be recycled by oxidizing the tungsten composition at a temperature greater than 700.degree. C. to form a water insoluble tungsten trioxide. This is then reduced to form tungsten dioxide. The tungsten dioxide is subjected to a low temperature oxidation which forms monoclinic tungsten trioxide. The monoclinic tungsten trioxide is then dissolved in ammonia to form ammonium tungstate. If present, the binder metal such as cobalt is converted into the soluble ammine complex. This can be spray dried and carburized to form tungsten carbide. If the form composition includes cobalt or other binder metal, the ratio of cobalt to tungsten can be adjusted by adding cobalt salts or ammonium metatungstate to the aqueous solution prior to spray drying to form a precursor composition. This is uniquely suitable for forming a cobalt tungsten carbide composition.
Abstract:
A single longitudinal-mode laser includes a first mirror and a second mirror that define a laser cavity therein that does not include a linear polarizer. A birefringent gain medium can generate a lasing light at a lasing wavelength along a light propagation direction in response to a pump light at a pumping wavelength. The birefringent gain medium has an optical axis substantially perpendicular to the light propagation direction. A first wave plate positioned between the first mirror and the birefringent gain medium is a quarter wave plate at the lasing wavelength and a whole wave plate at the pumping wavelength. A second wave plate is positioned between the birefringent gain medium and the second mirror. The first wave plat and the second wave plate in part produce a single longitudinal mode in the lasing light.
Abstract:
A method and apparatus for electrically coupling a slider to a controller circuit are disclosed. In one embodiment, a pre-amplifier with an integrated electrical connector (I-connector) may be connected via an electrical trace to a slider and via a head stack assembly flexible circuit to a control circuit. The pre-amplifier may have two parallel series of spring probe claws, two parallel series of contact pegs, two slots, or a slot and a rotary cam.
Abstract:
The present invention relates to an optical interferometer based on a Mach-Zehnder interferometer that can be used as an optical channel interleaver in wavelength division multiplexed (WDM) and dense wavelength division multiplexed (DWDM) optical networks. Optical channel interleavers/de-interleavers combine sets of WDM and DWDM channels for transmission over a network and/or separate WDM and DWDM signals into sets of channels with more convenient channel spacing for further de-multiplexing. The interferometer according to the present invention utilizes a ring resonator in each arm thereof as a phase shifter to provide a flat-top wavelength response with wide pass-bands and stop-bands.
Abstract:
The invention relates to a micro-optic adhesive assembly and a method for making a micro-optic assembly. The method of joining optical assemblies in accordance with the present invention improves the strength and shock resistance of adhesive joints in micro-optic devices without affecting the optical path. The adhesive assembly of the present invention has sufficiently flexibility to be able to conform to different alignment geometries without introducing significant bulk or thermal expansion incompatibility. Further the improved method is compatible with the device manufacturing techniques and does not add significant manufacturing complexity. An optical device in accordance with the invention comprises: a first optical element having an optical path therethrough and having a coupling end face; a second optical element having an optical path therethrough and having a coupling end face optically coupled to the coupling end face of the first optical element such that light propagating on the optical path of the first element couples to the optical path of the second element; an adhesive joint between the coupling end face of the first element and the coupling end face of the second element, such that adhesive is not in the optical paths therethrough; and a plurality of flexible crossties each secured to an exterior surface of the first element and to an exterior surface of the second element to reinforce the adhesive joint.