An airfoil section comprising a relatively thick trailing edge and a sloped rear surface.

A coating device for use in coating circular cross-sectioned substrates has a semi-circular doctor blade. The coater may also have a plate for holding axially symmetric substrates which can be rotated about an axis. A groove in the plate centers the substrate on the plate for rotation. The doctor blade is located adjacent to the substrate such that when the plate and substrate are rotated, the doctor blade applies a uniform thickness of coating to one side of the substrate. After one side of the...

An integrated circuit having signal traces, power traces, and ground traces. The signal traces are disposed on at least one signal distribution layer, and the signal traces on the at least one signal distribution layer are formed at no more than a first thickness. The power traces and ground traces are formed on at least one power ground distribution layer, where the at least one power ground distribution layer is an overlying layer of the integrated circuit relative to the at least one signal d...

A method of improving the physical characteristics of a conductor paste includes the step of adding ZnO in an amount sufficient to achieve about 1% to 3%, by weight, of the total. Where the conductor paste is adapted to be fired at 850.degree. C., ZnO is added in an amount sufficient to achieve about 2% of the total, and where the conductor paste is adapted to be fired at 985.degree. C., ZnO is added in an amount sufficient to achieve about 3% of the total. Several conductor pastes, based on dif...

Disclosed is a method and resulting product whereby thick film conductors which require a reducing firing atmosphere may be included in circuits with thick film resistors requiring an oxidizing firing atmosphere. In accordance with one embodiment, a fritless paste including copper is deposited onto a substrate in a desired conductor pattern and fired to establish adhesion. The copper oxide in the pattern is then reduced to copper metal at a high temperature. This is followed by oxidation of the ...

A folded, highly pure platinum, thick film, path on a ceramic cylindrical substrate provides a high TCR of about 3850 ppm/.degree. C. The path is applied by screen printing a thick film paste onto a substrate and then firing the paste at a time and temperature sufficient to bond the path to the substrate and to produce a TCR of at least about 3850 ppm/.degree. C. The paste is comprised of about 20% by weight of an organic carrier into which 80% by weight of particles have been mixed. The particl...

A coating composition for thick coating prepared by adding an aggregate to a coating liquid containing 5 to 40% by weight as SiO.sub.2 of a coloidal silica and 3 to 40% by weight of disolved and/or finely dispersed organic polymer, having an SiO.sub.2 /M.sub.2 O mole ratio (in which M is a monovalent alkali metal atom) of at least 7, and having a viscosity lower than 100 c.p. at 20.degree. C. when kept in the sealed state at 50.degree. C. for 10 days. Said coating composition being especially su...

A thick film resistor which fuses at low continuous current yet withstands high voltage pulses. The resistor design comprises a series of smaller thick film resistors disposed on a ceramic substrate, each having laser trimmed kerfs strategically located to control current flow and prevent voltage arcing across the kerfs.

A thick-film circuit device having a substrate of insulating material containing alkali components, a first crossover made of non-alkali type glass and formed on the substrate, wiring conductors formed on the first crossover according to a predetermined circuit pattern, and a second crossover made of glass and formed on the first crossover so that it covers the wiring conductors, the first crossover preventing entry of sodium ions into the second crossover.

A coating composition especially suitable for a machinable aluminum-filled coating possessing improved salt corrosion and oxidation resistance having a liquid binder which comprises phosphate ions and ions of the group of chromate or molybdate ions, and an atomized aluminum powder having an average particle size (as expressed in terms of the median equivalent spherical diameter (ESD)), that is greater than at least 15 .mu.m, and having a size distribution such that at least about 5% of the parti...