Comb-like electrodes

The ohmic series resistance is determined by the geometrical layout of the capacitor as well as by the conductance of its electrodes. The electrochemically etched array of straight pores produces a comb-like electrode structure and gives very low values of electrical series resistance (ESR) for the capacitor chip. 

Conventional humidity sensors of the electric resistance variable type use hydrocarbon polyelectrolyte as a moisture sensing material. Therefore, the sensors usually have insufficient heat resistance, and cannot be used at temperatures of 60°C or more. Another problem is that they deteriorate when in contact with cigarette smoke and oil contained in the air [64,65]. When the fluorinated pitch-deposited coating was breathed upon, the electrical resistance quickly decreased, but electrical resistance quickly recovered when this action was stopped. Then, how to develop a humidity sensor excelling in humidity response sensitivity, heat resistance and durability was attempted [66]. Two kinds of comb-like electrodes with different electrode gaps were made, and a thin film was formed on the surfaces by vacuum deposition of fluorinated pitch. The obtained fluorinated pitch sensors were left at rest in a thermostatic chamber, and electrical resistance was determined under the following conditions. 

Saito Y, Ogawa A, Uchida S, Kubo T, Segawa H (2010) Energy-storable dye-sensitized solar cells with interdigitated nafion/polypyrrole-Pt comb-like electrodes. Chem Lett 39 488 89... 

A pair of comb-like electrodes were dipped in a circular tray filled with DMSO (see Fig. 2.27). When a DC field was apphed, the solvent started flowing from anode to cathode. The flowing rate was measured by using polystyrene powder floating on the solvent as a probe. The flow rate increased proportionally with the square of the field (Fig. 2.28). This result suggests that the pressure gradient is generated between the electrodes. 

A three-dimensional device was obtained by an hybrid assembly of comb-like multishank electrodes. The final structure resembled a bed of nails [69,70]. The array contains 256 electrodes with a lateral and horizontal spacing of 120 pm and 150 pm, respectively (Fig. 10). The assembly was sealed with glass and was implanted into the subarachnoidal space without any significant tissue damage. 

Detector elements 11 are formed on a ceramic substrate 1. Each detector element includes a photosensitive zone 9, an output terminal 4 and a common terminal S. The detector elements are arranged in an array protruding from a common metal line 3, which is connected to a terminal pad 6. The terminal electrodes and the common metal line are formed on a comb-like patterned photo-conductive layer 2. An aperture plate 7 of silicon or ZnS having apertures 8 formed therein by an anisotropic etching method is prepared. The purpose of the aperture plate is to restrict the field of view of the photosensitive zones. An auxiliary electrode 30 is formed on the aperture plate. When the aperture plate is assembled with the substrate using an adhesive, the auxiliary electrode is pressed against the common metal line and the common terminal, which together reduce the electrical resistance. 

Fig. 5.10.1 Schematic drawing of a rotational disc gyro. The rotor (in blue) is oscillating around the z axis, driven by fixed comb structures. A yaw rate around the y axis generates a Coriolis force in the z direction. The resulting seesaw-like out-of-plane motion of the rotor is detected by measuring the difference in capacities between the rotor and detecting electrodes beneath it...

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