Sheet switch

Claim 2

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 insulative films being provided on a surface thereof facing said spacer and including: a plurality of first electrodes at positions corresponding to said through holes, respectively; 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 cover 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 being partially disconnected to define a gap, so that said resistance is integrally formed with said upper layer formed of said relatively high resistance paste at a position corresponding to said gap, the width of said relatively high resistance paste being reduced at a position corresponding to said gap to define an essential part of said resistance; a second one of said pair of insulative films being provided on a surface thereof facing said spacer 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.

Claim 3

A sheet switch as set forth in claim 1, wherein a relationship between a resistance value R H of said relatively high resistance paste and a resistance value R L of said relatively low resistance paste is: R L /R H ≦0.1.

Claim 4

A sheet switch as set forth in claim 1, wherein said relatively high resistance paste is a carbon paste and said relatively low resistance paste is a silver paste.

Claim 5

A sheet switch as set forth in claim 1, wherein said spacer is made of a plastic film such as polyester.

Claim 6

A sheet switch as set forth in claim 1, wherein said spacer is made of a silicon rubber.

Claim 7

A sheet switch as set forth in claim 1, wherein said flexible insulative films are made of a plastic film such as polyester.

Claim 8

A sheet switch as set forth in claim 1, wherein said plurality of resistance patterns are parallel to each other.

Claim 9

A sheet switch as set forth in claim 1, wherein each of said resistance patterns is bent into one of an S-shape, a reversed S-shape, or a zig-zag, so that a length of said resistance pattern is larger than that of said gap.

Claim 10

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.

Claim 11

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.

Claim 12

A sheet switch as set forth in claim 9, wherein a relationship between a resistance value R H of said relatively high resistance paste and a resistance paste is: R L /R H ≦0.1.

Claim 13

A sheet switch as set forth in claim 9, wherein said relatively high resistance paste is a carbon paste and said relatively low resistance paste is a silver paste.

Claim 14

A sheet switch as set forth in claim 9, wherein said flexible insulative films are made of a plastic film such as polyester.

Claim 15

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.

Claim 16

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.

Claim 17

A sheet switch as set forth in claim 13, wherein said plurality of resistance patterns are parallel to each other.

Claim 18

A sheet switch as set forth in claim 13, wherein each of said resistance patterns is bent into one of an S-shape, a reversed S-shape, or a zig-zag, so that a length of said resistance pattern is larger than that of said gap.

Claim 19

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.

Claim 20

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.