Wound resistor-capacitor network and method of forming

Details Wound resistor-capacitor network and method of forming Wound resistor-capacitor network and method of forming

H - Electricity

01

C

334/22, 334/6

H01C 17/04 (2006.01) H01C 1/16 (2006.01) H01G 4/40 (2006.01)

Patent

CA 1038463

WOUND RESISTOR-CAPACITOR NETWORK AND METHOD OF FORMING Abstract of the Disclosure A wound resistor-capacitor network having stable frequency response over a wide frequency range (e.g., 60 cycles to 100 kilohertz), is produced by forming a pair of aligned circumferentially extending resistance paths in one of two strips of metallized dielectric film. Forming of the resistance paths is accomplished as the two metallized strips are being wound to form an R-C network roll, by removing metal from the one strip along a first line to produce a gap in the metal layer in parallel spaced relationship to an adjacent edge of the film. Subsequently, removal of metal from the first strip also is initiated along a second line spaced inward from the first line, to produce another gap in the metal layer, thereby forming an elongated first path of desired resistance between the two lines. Metal removal along the first line then is temporarily interrupted to provide a lead termination area and a current steering path at the adjacent end of the network roll, on either side of the strip midpoint. Metal removal along a third line in alignment with the first line then is continued until an elongated second path of desired resistance has been formed between the second and third lines, at which time metal removal along the second line is terminated. Lines of metal also may be removed from the second dielectric film to provide a lead termination area and a current steering path at the opposite end of the wound network roll. Preferably, the metal is removed with the split beam of a single laser and the lines of removal are symmetrical on opposite sides of each strip's longitudinal midpoint.

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