Method of manufacturing variable electrical resistors and resistors obtained by the implementation of this method

摘要

The invention relates to the field of calibrated electrical resistors, which can be varied by moving a slide contact over their surface, using, as a base support, a conventional printed-circuit board 1 possessing generally independent conducting tracks 2, having the special feature of comprising: a) a first layer 3 of an electrically conducting material covering the conducting tracks; b) a second layer 5 of electrically conducting material covering a reserved zone 4; c) a dielectric insulating layer 6 protecting the said zone. <IMAGE>