Publication

Effet de couches protectrices sur les résistances DuPont 20x1 [Effect of protective layers on DuPont 20x1 resistors]

Thomas Maeder
2000
Reports

Abstract

Trois couches protectrices ont été essayées sur la série de compositions résistives Du Pont 20x1: les verrages ESL G–481 et Du Pont QQ600 (cuisson à env. 600°C), ainsi que le diélectrique Du Pont QM42 (cuisson à 850°C). Dans cette étude, les terminaisons Du Pont 5104 (Ag:Pd 3:1) et 5744 (Au) ont été utilisées. Les deux verrages sont compatibles avec les résistances; ils en modifient légèrement la valeur et les coefficients en température, et cela de façon très reproductible. En revanche, le diélectrique Du Pont QM42 modifie beaucoup trop les résistances. De plus, il tend à détruire les jonctions résistance – terminaisons, surtout dans les cas de Du Pont 5104 (Ag:Pd). On [ne doit] donc pas l'utiliser comme couche protectrice avec ces résistances et ces terminaisons.

Official source

https://infoscience.epfl.ch/entities/publication/c007b08e-6740-446e-8242-b0398d6113ba

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Thomas Maeder
2000
Reports

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/c007b08e-6740-446e-8242-b0398d6113ba

About this result

Related concepts (3)

Palladium

Palladium is a chemical element with the symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1803 by the English chemist William Hyde Wollaston. He named it after the asteroid Pallas, which was itself named after the epithet of the Greek goddess Athena, acquired by her when she slew Pallas. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs).

Silver

Silver is a chemical element with the symbol Ag (, derived from the Proto-Indo-European h2erǵ 'shiny, white') and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc refining.

Nonmetal (chemistry)

A nonmetal is a chemical element that, in the broadest sense of the term, has a relatively low density and high electronegativity; they range from colorless gases (like hydrogen) to shiny solids (like carbon, as graphite). They are usually poor conductors of heat and electricity, and brittle or crumbly when solid due to their electrons having low mobility. In contrast, metals are good conductors and most are easily flattened into sheets and drawn into wires since their electrons are generally free-moving.