Sheet switch

A sheet switch comprising:

• a pair of flexible insulative films laminated to each other;
• a first one of said pair of insulative films being provided on a surface thereof facing a second one of said pair of insulative films including:
• a plurality of first electrodes;
• resistances connected to said first electrodes, respectively;
• and
• first line patterns for externally connecting said first electrodes via said resistances;
• each of said first line patterns being a laminated structure including:
• an underlayer formed of a relatively low resistance paste;
• and
• an upper layer formed of a relatively high resistance paste coated over said underlayer;
• said underlayer formed of said low resistance paste being partially disconnected to define a gap, so that said resistances are formed integrally with said upper layer formed of said relatively high resistance paste at a position corresponding to said gap, a width of said relatively high resistance paste being larger than a width of said relatively low resistance paste, the width of said relatively high resistance paste being reduced at a position corresponding to said gap to define an essential portion of said resistance;
• a second one of said pair of insulative films being provided on a surface thereof facing said first insulative film and including:
• a plurality of second electrodes at positions corresponding to said first electrodes, respectively;
• and
• second line patterns for externally connecting said second electrodes;
• means for defining a space between each of said first electrodes formed on said first insulative film and said second electrodes formed on said second insulative film;
• and
• means for electrically insulating said first line patterns formed on said first insulative film and said second line patterns formed on said second insulative film.

A sheet switch comprising:

• an insulative film spacer having a plurality of through holes, said spacer being laminated between a pair of flexible insulative films;
• a first one of said pair of flexible insulating films provided on a surface of said spacer and including:
• a plurality of first electrodes located at positions corresponding to said through holes;
• resistances respectively connected to said first electrodes and including a plurality of resistance patterns;
• first line patterns for externally connecting said first electrodes via said resistances,
• each of said first line patterns comprising a laminated structure, including:
• an underlayer formed of a relatively low resistance paste;
• and
• an upper layer formed of a relatively high resistance paste coated over said underlayer, a width of said relatively high resistance paste being larger than a width of said relatively low resistance paste;
• said underlayer formed of said relatively low resistance paste and partially disconnected to define a gap, said resistances integrally formed with said upper layer at a position corresponding to said gap and said resistance patterns formed over said gap, a total width of said resistance patterns being smaller than the width of said relatively high resistance paste;
• a second one of said pair of flexible insulative films being provided on a surface of said spacer and including:
• a plurality of second electrodes located at positions corresponding to said first electrodes, respectively, and
• second line patterns for externally connecting said second electrodes.

A sheet switch comprising:

• a pair of flexible insulative films laminated to each other;
• a first one of said pair of flexible insulative films facing a second one of said pair of insulative films, said first one of said flexible insulative films comprising:
• a plurality of first electrodes;
• resistances respectively connected to said first electrodes and including a plurality of resistance patterns;
• and
• first line patterns for externally connecting said first electrodes via said resistances;
• each of said first line patterns being a laminated structure including:
• an underlayer formed of a relatively low resistance paste;
• and
• an upper layer formed of a relatively high resistance paste coated over said underlayer;
• said underlayer being partially disconnected to define a gap so that said resistances are integrally formed with said upper layer at a position corresponding to said gap, said resistance patterns being formed over said gap, the width of said relatively high resistance paste being larger than a width of said relatively low resistance paste, a total width of said resistance patterns being smaller than the width of said relatively high resistance paste;
• a second one of said pair of flexible insulative films facing said first one of said pair of flexible insulative films;
• said second one of said flexible insulative films comprising:
• a plurality of second electrodes formed at positions corresponding to said first electrodes, respectively;
• and
• second line patterns for externally connecting said second electrodes;
• means for defining a space between each of said first electrodes formed on said first insulative film and said second electrodes formed on said second insulative film;
• and
• means for electrically insulating said first line patterns formed on said first insulative film and said second line patterns formed on said second insulative film.