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| Coating blade for microtome and method for the preparation thereof |
| OF THE PREFERRED EMBODIMENTS As is described above, the microtome blade of the invention is ... |
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| Method of removing a layer of organic matter |
| Accordingly, it is a general object of the present invention to provide a novel and useful method ... |
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| Structures and processes for fabricating field emission cathodes |
| OF THE INVENTION This invention describes a novel new technique and structure for the integrated ... |
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| Apparatus and method for detecting the presence of a discontinuity on a glass surface |
| What is claimed is: 1. An apparatus for detecting the presence or absence of a discontinuity on a ... |
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| Authenticating system |
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| Capillary for electrospray ion source |
| Capillaries according to the present invention may be made with such dimensions and proportions as ... |
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Electrochemical sensors
| Details |
Inventors: Maley, Thomas C.; D'Orazio, Paul A.; Dalzell, Bonnie C.; Edelman, Peter G.; Flaherty, James E.; Mason, Richard W.; McCaffrey, Robert R.;
Assignee: Ciba Corning Diagnostics Corp. (Medfield, MA)
Primary Examiner: Bell; Bruce F.
Assistant Examiner:
Attorney, Agent or Firm: Slepchuk, Jr.; Nicholas I., Morgenstern; Arthur S., Roesler; Judith A.
A solid state, multi-use electrochemical sensor having an electrically nonconductive substrate, a working electrode, and a semi-permeable membrane covering the working electrode. The working electrode includes an electrically conductive material adhered to a portion of the substrate. A first portion of the conductive material is covered with an electrically insulating dielectric coating, and a second portion of the conductive material is covered with an active layer. The active layer includes a catalytically active quantity of an enzyme carried by platinized carbon powder particles, which are distributed throughout the active layer. A sensor package for incorporating a sensor is provided. |
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DETAILED DESCRIPTION OF THE INVENTION Referring now to the drawings, in which like reference numerals designate like or corresponding parts throughout the several views, an assembled electrochemical sensor package 10 in accordance with a preferred embodiment of the present invention is illustrated in FIG.
1.
Package 10 has a generally J-shaped body, including a handle portion 12, a main body 14, contact portion 16, and fluid or liquid passageway 18.
The internal components of sensor package 10 are shown in an exploded view in FIG.
2.
Package 10 includes a J-shaped housing 20 having a recess 22 formed therein.
The recess 22 which forms a part of a sample chamber 54 (FIG.
5) includes an outer perimeter 24 and at least one passageway 18.
Housing 20 has a substantially flat upper portion 120, sidewalls 122, 124, a frontal opening 126, and a rear wall 128 which is contiguous with sensor package handle portion 12.
Housing 20 further includes a depressed inner rim 130 and projections 132 which contact the lead frame 32 when package 10 is assembled.
A gasket 26 is provided to contact, and form a seal between, the housing perimeter 24 and a sensor 28.
Gasket 26 is substantially rectangular-shaped and includes a substantially oval-shaped opening 134, and two raised surfaces 136, 138 which run along the length of gasket opening 134.
Gasket raised portions 136, 138 allow gasket 26 to fit around the housing recess perimeter 24, while also allowing recess 22 to be exposed to sensor 28.
A sensor pad 30 is provided to support sensor 28.
Sensor pad 30 includes a series of transverse protrusions 140 on rear side 142 which provide sensor 28 with added support when package 10 is assembled.
Lastly, a contact lead frame 32 is provided to electrically connect sensor 28 to an instrument (not shown) which can measure and convert a current to determine analyte concentration, i.
e.
glucose or lactate.
Contact lead frame 32 includes four leads 34 secured to a base 36 at a first end portion 38, and a sensor recess 40 at a second end portion 42
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