Abstract:
An ion sensor (20) is formed by disposing a carbon coating at part on a substrate (1) on which copper wires are printed, connecting the substrate (1) and lead wires (2) with a solder (3), insulating the solder (3) with a silicone resin (4), and applying sequentially a redox function layer (11) obtained by electrolytic oxidation of 2,6-xylenol and an ion-selective layer (12) onto the printed wire portion (10a) coated with the carbon coating. Since this ion sensor can be formed on the printed wire substrate, various devices including the ion sensor can be formed easily on the substrate.
Abstract:
The surface of an insulating film at the gate of an ion-selective field effect transistor (ISFET) (10) is covered with a thin carbon film (4) and the surface of this film is covered further with an electrolytically polymerized 2,6-xylenol film (3). The resulting ISFET exhibits hydrogen ion selectivitly, has small drift but high stability and is hardly responsive to light. If the surface of the 2,6-xylenol polymer film (3) is covered with other ion-selective films or enzyme-active films, the concentrations of various ions and living substrate can be measured.
Abstract:
An ion sensor which is prepared by covering a conductive base (1) with a redox function layer (5) composed of an electrolytic polymer membrane of a hydroxy or amino compound having a biphenyl skeleton, or a mixture thereof, etc., and covering the surface with an ion-selective layer (4). This ion sensor suffers less dissolution of the redox function layer (5) into the ion-selective layer (4), thus showing stable properties and having a long life.
Abstract:
A carbon-containing carbon layer (3) is deposited on the surface of an electrically conductive substrate to form an electrically conductive substrate, and the surface of this carbon layer is covered with ion-sensitive films (4), (5) which generate a potential corresponding to a predetermined ion concentration. The resulting ion sensor can be shaped freely, particularly, can be made very small, and can measure an ion concentration in the blood vessel or a capillary.
Abstract:
The ion sensor is formed by providing an oxidizing/reducing layer (5) on the surface of a conductive base (1) through electrolytic polymerization, and providing the surface of the layer (5) thus formed with an ion carrier membrane (6) containing polyvinyl chloride, a plasticizer, and an ion carrier, said plasticizer being selected from among those based on a phthalate, maleate, adipate, carboxylate, polycaprolactone and modified ethylene-vinyl acetate copolymer. The obtained ion sensor has a good stability because of a low solubility of the oxidizing/reducing layer in the plasticizer, and shows a low toxicity, thus being usable in vivo.
Abstract:
A printed wiring board is provided with a base material, which has at least one wiring and is composed of an adhesive insulating base material and a conductive layer formed on one plane of the insulating base material; a penetrating electrode which is connected to the conductive layer, penetrates the insulating base material and is composed of a conductive paste; and an IC chip having a rewiring section. An IC chip is embedded in an interlayer adhesive material of the base material having the wiring, by connecting the rewiring section with the penetrating electrode. A supporting substrate is arranged on a plane opposite to the rewiring section of the IC chip through the adhesive layer, and the rewiring section and the base material having the wiring constitute a rewiring layer. Therefore, the multilayer printed wiring board having fine components mounted thereon is provided by simple process without increasing the cost and deteriorating the yield.