Compact electronic device
AssigneeCasio Computer Co., Ltd.
InventorsKazuhiro Sugiyama, Yoshio Kawai
Life of this patent
Estimating the term…
Abstract
A key switch structure comprises a first insulating cover having on one surface thereof a first conductive layer and an anisotropically electrical conductive layer printed on the first conductive layer, a second insulating cover having one surface arranged at a side opposite to the anisotropically electrical conductive layer on the first cover member, and a second conductive layer sandwiched between the anisotropically electrical conductive layer and the second insulating cover. At least, one of the first and second insulating covers being flexible. A depression force is selectively introduced from the other surface side of the flexible cover through the anisotropically electrical conductive layer so as to form a conductive path between the first and second conductive layers.
Claims9
A compact electronic device, comprising:
- a first cover, said first cover being flexible;
- a second cover, said second cover being rigid;
- a plurality of anisotropically electrical conductive islands arranged on a surface between said first and said second covers and having two opposed ends facing, respectively, said first and said second covers;
- a plurality of chip connecting terminals and a plurality of pattern connecting terminals on said surface;
- a plurality of first conductive patterns each of which includes a number of key input terminals contacting one end of said islands, and being connected to a first group of said plurality of chip connecting terminals;
- a plurality of second conductive patterns connecting a second group of said plurality of chip connecting terminals to said plurality of pattern connecting terminals;
- a plurality of third conductive patterns each of which including a number of key input terminals contacting the other end of said islands, and being connected to said plurality of pattern connecting terminals;
- an integrated circuit chip carried on said second cover, said integrated circuit chip including terminals which are connected to the plurality of chip connecting terminals;
- and
- an insulating layer for covering said first and said second conductive patterns while leaving exposed the pattern connecting terminals and the chip connecting terminals.
A compact electronic device, comprising:
- an electrical insulating substrate;
- first key input terminals formed on said substrate, each of said terminals comprising a pair of contacts;
- anisotropically electrically conductive islands printed on each of said first terminals;
- a first synthetic resin layer printed on said substrate while leaving said islands exposed;
- second key input terminals printed on said islands and on said synthetic resin layer, each of said second terminals has a surface area facing each of the pairs of contacts;
- and
- a second synthetic resin layer coated on said second terminals, on which key symbols are printed.
Dependencies are inferred from the claim text.