Selective chemical sensitive field effect transistor transducers
First Claim
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1. A selective chemically sensitive FET transducer which selectively detects specific chemical substances to which the transducer is exposed, which comprises:
- an FET transducer whose gate region is overlayed with a chemically selective sensitive membrane, which reacts or interacts with a specific chemical substance(s) and which is provided with a semipermeable membrane having a water content greater than 10% overlying said chemically selective sensitive membrane, said semipermeable membrane consisting of a hydrophillic membrane material(s) or a hydrophobic membrane material(s), each of said maerial(s) containing a light darkening dye or pigment.
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Abstract
A chemical sensitive field effect transistor transducer is provided having a semipermeable membrane on the surface of a chemical selective system overlying an insulated gate field effect transistor. Such a field effect transistor transducer is effective for the measurement of chemical constituents of factory waste water containing micro-particles, saliva or blood containing proteins, etc., where conventional devices give unreliable results.
62 Citations
12 Claims
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1. A selective chemically sensitive FET transducer which selectively detects specific chemical substances to which the transducer is exposed, which comprises:
an FET transducer whose gate region is overlayed with a chemically selective sensitive membrane, which reacts or interacts with a specific chemical substance(s) and which is provided with a semipermeable membrane having a water content greater than 10% overlying said chemically selective sensitive membrane, said semipermeable membrane consisting of a hydrophillic membrane material(s) or a hydrophobic membrane material(s), each of said maerial(s) containing a light darkening dye or pigment. - View Dependent Claims (2, 3, 4, 6, 7, 8, 9)
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5. A selective chemically sensitive FET transductor which selectively detects specific chemical substances to which the transducor is exposed, which comprises:
an FET transducer whose gate region is overlayed with a chemically selective sensitive membrane, which reacts or interacts with a specific chemical substance(s) and which is provided with a semipermeable membrane having a water content greater than 10%, overlying said chemically selective sensitive membrane, said semipermeable membrane being formed of a hydrophilic material selected from the group consisting of a polymethacrylate, a polyacrylate, a polyacrylamide, a polyvinylpyrrolidone, a polyvinyl alcohol and copolymers thereof. - View Dependent Claims (10, 11, 12)
Specification