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US 10,937,609 B1Granted
Membrane circuit structure
AssigneePrimax Electronics Ltd.
InventorsBo-An Chen, Chin-Sung Pan
Life of this patent
Estimating the term…
Abstract
A membrane circuit structure includes a first film substrate and a first circuit layer. The first circuit layer is disposed on the first film substrate. The first circuit layer contains first conductive silver paste and second conductive silver paste. The first conductive silver paste has a first impedance value. The second conductive silver paste has a second impedance value. The first impedance value is 10 to 15 times the second impedance value.
Claims8
A membrane circuit structure, comprising:
- a first film substrate;
- and
- a first circuit layer disposed on the first film substrate, and containing first conductive silver paste and second conductive silver paste, wherein the first conductive silver paste has a first impedance value, and the second conductive silver paste has a second impedance value, wherein the first impedance value is 10 to 15 times the second impedance value to avoid key ghosting, wherein the first circuit layer comprises plural main traces and plural outlet traces, which are connected with each other, wherein the first film substrate comprises a first zone and a second zone, which are arranged beside each other, wherein the main traces are included in the first zone, and the outlet traces are included in the second zone, and wherein the main traces and the outlet traces of the first circuit layer are made of the first conductive silver paste, and a bent part at a junction between the main traces and the outlet traces is made of the second conductive silver paste.
Dependencies are inferred from the claim text.