A composition for selectively etching inorganic oxides with respect to titanium includes an oxidizing agent, a buffered aqueous solution of hydrofluoric acid, a tetrazolium salt and sufficient organic solvent to make a stable solution. During the etching process, tetrazolium cations are reduced to form an etch insoluble formazan dye which deposits upon negatively charged(cathodic)sites, thereby suppressing galvanic corrosion.

A new process for plasma etching silicon oxides in integrated circuit structures. A chemistry comprising both oxygen and nitrogen trifluoride is used, with oxygen the dominant component. This provides excellent selectivity to silicon. This etch chemistry also erodes photoresist rapidly, so that it is typically used in combination with a hard-masking process. One particular application of this invention is in a cantilever-etch-mask contact profiling process.

A composite sintered oxide resistor comprising crystal grains of zinc oxide and crystal grains of a zinc oxide compound of other metal or semi-metal element than zinc, and a grain boundary layer having an electric resistance equal to or lower than that of the crystal grains and which of zinc oxide between the individual crystal grains has a very large withstanding capacity against switch surge, a small non-linear coefficient of voltage in the voltage-current characteristics, a positive, smaller ...

A process for forming a homogeneous mixture of yttrium oxide and zirconium oxide involves dissolving yttrium oxide and hydrochloric acid in water, precipitating yttrium hydroxide by adding ammonium hydroxide to the solution and dissolving yttrium hydroxide in acetic acid, adding zirconium oxide to the resulting solution which is thereafter spray dried to yield an agglomerate having uniformly distributed yttrium acetate throughout and thereafter converting the yttrium acetate to yttrium oxide to ...

A dispersion containing zinc oxide particles having a dispersion particle size of (i) median volume particle diameter in the range from 70 to 130 nm, (ii) less than 16% by volume of particles having a volume diameter of less than 35 nm below the median volume particle diameter, and (iii) more than 84% by volume of particles having a volume diameter of less than 57 nm above the median volume particle diameter. The zinc oxide dispersion can be used in a sunscreen product that exhibits both effecti...

Dielectric layers containing a chemical vapor deposited hafnium oxide and an electron beam evaporated lanthanide oxide and a method of fabricating such a dielectric layer produce a reliable dielectric layer having an equivalent oxide thickness thinner than attainable using SiO.sub.2. Forming a layer of hafnium oxide by chemical vapor deposition and forming a layer of a lanthanide oxide by electron beam evaporation, where the layer of hafnium oxide is adjacent and in contact with the layer of lan...

A composite sintered oxide resistor comprising crystal grains of zinc oxide and crystal grains of a zinc oxide compound of other metal or semi-metal element than zinc, and a grain boundary layer having an electric resistance equal to or lower than that of the crystal grains of zinc oxide between the individual crystal grains and which has a very large withstanding capacity against switch surge, a small non-linear coefficient of voltage in the voltage-current characteristics, a positive, smaller ...

An oxide superconductor including an oxide superconductor member and a hermetical seal layer, coated over the oxide superconductor member, for hermetically sealing the oxide superconductor member from the atmosphere.

Osteoconductive/osteoinductive titanium/titanium alloy implant comprising an additional element in the titanium oxide, obtained by anodic oxidation. The implant comprises an additional element in the titanium oxide such as calcium, phosphor or sulphur. The invention also relates to a process of producing the implants.

An oxide cathode comprising a base 1 which consists substantially of titanium and a heater element 5 coated with aluminium oxide 6 to heat the base 1, which bears a porous alkaline earth metal oxide emissive layer 4. When the surface of the titanium base 1 which is opposed to the heater element 5 bears a metal layer 7 consisting at least of one of the metals Pt, Mo, Ta and W, a solution is obtained to the problem occurring in titanium cathodes in that titanium in contact with aluminium oxide is ...