Method of manufacturing high-voltage and/or high-power thick-film screen- printed cylindrical resistors having small sizes, low voltage coefficients, and low inductance, and resistor thus manufactured

摘要

A method of making a compact high-voltage, high-power, thick- film screen-printed cylindrical resistor. A V-serpentine pattern is formed and adapted to fit on a cylindrical substrate having a diameter range of about 1/10 inch to about 1/2 inch. Such pattern is caused to have adjacent sections at a small acute angle to each other. Furthermore, the pattern is caused to have gaps at the open ends of the loops that are substantially wider than the gaps at the closed ends of the loops. In addition, the pattern is caused to have a sufficient number of undulations, and sufficient gap size, to achieve a predetermined voltage rating. Thereafter, the height of the pattern is changed to achieve a voltage coefficient substantially corresponding to the desired voltage coefficient. Furthermore, the resistive film material is altered to cause it to have a different resistivity, said latter resistivity being such that the same resistance value is achieved. The invention further comprises a cylindrical screen-printed thick-film resistor, and a method of balancing inductance against voltage/power rating.