Moisture-Sensitive Element with an Interdigital Capacitor and Fabrication thereof
First Claim
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1. A moisture-sensitive element with an interdigital capacitor, comprising:
- a printed circuit board (PCB);
an interdigital capacitor formed on said printed circuit board; and
a sensing layer formed on said interdigital capacitor;
wherein said interdigital capacitor comprises;
a first electrode comprising a plurality of first extending electrodes; and
a second electrode comprising a plurality of second extending electrodes provided interlaced with said plurality of first extending electrodes wherein each first extending electrode together with its neighboring second extending electrode form a pair of extending electrodes.
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Abstract
A moisture-sensitive element with an interdigital capacitor (IDC) and fabrication thereof are disclosed, wherein the moisture-sensitive element with the interdigital capacitor investigates a moisture sensor for the determination of human skin moisture based on the interdigital capacitor. The moisture-sensitive element with an interdigital capacitor comprises a printed circuit board (PCB), an interdigital capacitor formed on the printed circuit board, and a moisture sensing layer formed on the interdigital capacitor.
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Citations
34 Claims
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1. A moisture-sensitive element with an interdigital capacitor, comprising:
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a printed circuit board (PCB); an interdigital capacitor formed on said printed circuit board; and a sensing layer formed on said interdigital capacitor; wherein said interdigital capacitor comprises; a first electrode comprising a plurality of first extending electrodes; and a second electrode comprising a plurality of second extending electrodes provided interlaced with said plurality of first extending electrodes wherein each first extending electrode together with its neighboring second extending electrode form a pair of extending electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A moisture-sensitive system with an interdigital capacitor, comprising:
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a moisture-sensitive element with said interdigital capacitor and a LCR meter (inductance-capacitance-resistance meter); wherein said moisture-sensitive element comprises; a printed circuit board (PCB); an interdigital capacitor formed on said printed circuit board; and a sensing layer formed on said interdigital capacitor wherein said interdigital capacitor comprises; a first electrode comprising a plurality of first extending electrodes and a first terminal; and a second electrode comprising a plurality of second extending electrodes provided interlaced with said plurality of first extending electrodes and a second terminal wherein each first extending electrode together with its neighboring second extending electrode form a pair of extending electrodes; and said first electrode is electrically coupled to said LCR meter via said first terminal and said second electrode is electrically coupled to said LCR meter via said second terminal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for fabricating a moisture-sensitive element with an interdigital capacitor, comprising:
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providing a printed circuit board (PCB); forming an interdigital capacitor on said printed circuit board by etching via printed circuit board technique wherein said interdigital capacitor comprises; a first electrode comprising a plurality of first extending electrodes and a first terminal; and a second electrode comprising a plurality of second extending electrodes provided interlaced with said plurality of first extending electrodes and a second terminal wherein each first extending electrode together with its neighboring second extending electrode form a pair of extending electrodes and said first terminal and said second terminal are printed on two surfaces of said printed circuit board by etching via printed circuit board technique; and mounting a sensing layer on said interdigital capacitor by hot pressing. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A method for determining skin moisture with an interdigital capacitor, comprising:
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placing a moisture-sensitive element with said interdigital capacitor on the skin wherein said moisture-sensitive element comprises; a printed circuit board (PCB); an interdigital capacitor formed on said printed circuit board; and a sensing layer formed on said interdigital capacitor wherein said interdigital capacitor comprises; a first electrode comprising a plurality of first extending electrodes and a first terminal; and a second electrode comprising a plurality of second extending electrodes provided interlaced with said plurality of first extending electrodes and a second terminal wherein each first extending electrode together with its neighboring second extending electrode form a pair of extending electrodes; absorbing the moisture on the skin by said sensing layer to change an output capacitance value of said interdigital capacitor; and receiving and measuring said output capacitance value by a LCR meter to determine the moisture content of the skin. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34)
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Specification