Thick-film non-step resistor with accurate resistance...

Details Thick-film non-step resistor with accurate resistance... Thick-film non-step resistor with accurate resistance...

H - Electricity

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H01C 10/22 (2006.01) H01C 10/30 (2006.01) H01C 10/32 (2006.01) H01C 10/34 (2006.01) H01C 17/06 (2006.01) H01C 17/235 (2006.01) H01C 17/24 (2006.01)

Patent

CA 2039049

A smooth resistance characteristic, a reduction in component cost, and high durability are achieved for a variable resistor card formed using thick-film silk screen deposition. An arcuate wiper track and radial extension areas are all formed of a resistance material deposited using silk screen techniques. Laser trimming of the extension areas provides a desired characteristic of resistance versus sweep angle for the variable resistor. The resistance characteristic is continuous and nonstepped, thereby avoiding the creation of spikes caused by small circuit breaks during sweeping movement of the wiper contact.

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