| 摘要 |
The present invention relates to a membrane switch sheet. The membrane switch sheet, used in a switching matrix type key input device including plural switch contact points, comprises a lower layer film that is wired through a one-time patterning process to have resistors with a uniform resistance value. In order to enable the resistors to have a uniform resistance value, the distance between the start point and each switch contact point on the line in a row scan direction on a switching matrix is uniform and only ink with low conductivity is used. Therefore, the switch sheet of the invention simplifies manufacturing processes and reduces manufacturing cost and time by simplifying the process for printing the conductive ink on the lower layer film in the manufacturing processes. |
