ELECTROCHEMICAL TEST STRIP AND MANUFACTURING METHOD THEREOF

• US 20150338366A1
• Filed: 08/25/2014
• Published: 11/26/2015
• Est. Priority Date: 05/20/2014
• Status: Abandoned Application

• Current Assignee: Kuang Hong Precision Co., Ltd.
• Original Assignee: Kuang Hong Precision Co., Ltd.
• Inventors: CHIANG, CHENG-FENG, CHIANG, JUNG-CHUAN, CHIANG, WEN-TE, CHIANG, CHIEN-YING, CHIANG, CHIEN-YI
• Application Number:
  US14/468,223
• Publication Number:
  US 20150338366A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C23C 18/1641 Organic substrates, e.g. resin, plastic
• CPC Class Codes: G01N 27/307 Disposable laminated or multilayered electrodes G01N27/3272 takes precedence
• CPC Class Codes: G01N 27/3272 Test elements therefor, i.e. disposable laminated substrates with electrodes, reagent and channels optical biosensors G01N33/52

Abstract

The present disclosure illustrates an electrochemical test strip and manufacturing method thereof. In the embodiment, a manufacturing process which is not complex and has well precision and convenience is provided to manufacture the electrochemical test strip for testing human body fluid. A surface metallization layer serves as a conductive signal transmission medium, so that the manufacturing cost can be reduced, and the material can be recovered by dissolving the metal in surface metallization.

Claims

1. An electrochemical test strip, comprising:

a baseboard, made of polymer plastic, the baseboard having at least one inspection portion recessed from a side of a front thereof;

at least one electrically conductive electrode portion, being an electrically conductive object disposed on the baseboard, a part of the at least one electrically conductive electrode portion extending into the inspection portion;

at least one electrochemical sensing portion, being a chemical sensing layer disposed in the inspection portion, the at least one electrochemical sensing portion producing a chemical reaction to generate an electrical signal after contacting a liquid sample to be tested; and

a cover, being a thin plate which covers on the baseboard and on the inspection portion correspondingly, whereby a test opening is formed on an outside end of the inspection portion and the liquid sample to be tested is dropped in the inspection portion via the test opening, the cover sheltering a junction portion between the electrically conductive electrode portion and the electrochemical sensing portion;

wherein a part of the electrically conductive electrode portion extends to outside of the cover and not being sheltered by the cover.

2. The electrochemical test strip as defined in claim 1, wherein the baseboard has at least one through hole disposed close to an inner side of the inspection portion, and the number of the at least one through hole corresponds to the electrically conductive electrode portion, and the electrically conductive electrode portion extends to outside of the cover and the part which is not sheltered by the cover penetrates the through hole and extends to a surface of a back side of the baseboard.

3. The electrochemical test strip as defined in claim 2, wherein the through hole is a circular hole.

4. The electrochemical test strip as defined in claim 1, wherein the baseboard comprises the polymer plastic without mixing catalyst in advance.

5. The electrochemical test strip as defined in claim 1, wherein the baseboard is a rectangular plate.

6. The electrochemical test strip as defined in claim 1, wherein the inspection portion is a structure of long straight groove.

7. The electrochemical test strip as defined in claim 1, wherein the electrochemical sensing portion further comprises a hydrophilic layer, a biochemical reaction layer, or a hydrophilic biochemical reaction layer.

8. The electrochemical test strip as defined in claim 1, wherein the cover is transparent.

9. The electrochemical test strip as defined in claim 1, wherein the cover or a portion of the baseboard being covered by the cover has at least one hole.

10. The electrochemical test strip as defined in claim 1, wherein the electrically conductive electrode portion is a polymer plastic having a surface with a conductive metal layer by electroplating or electroless plating, and the polymer plastic comprises a polymer plastic without mixing catalyst in advance, and a polymer plastic with mixing catalyst in advance.

11. A method of manufacturing an electrochemical test strip, comprising:

A. executing a dual material molding step, to inject a polymer plastic in a mold to form a baseboard, the baseboard having at least one inspection portion recessed from a side of a front surface thereof, and then inject a polymer plastic capable of being surface metallized on the baseboard to form at least one electrically conductive electrode portion, a part of the at least one electrically conductive electrode portion being extended to the inspection portion;

B. executing a surface metallization step, to perform a surface metallization on the electrically conductive electrode portion to be conductive;

C. executing an electric reaction layer coating step, to coat, drop or disperse the chemical test sample in the inspection portion to form an electrochemical sensing portion which can generate an electrical signal after contacting with the liquid sample to be tested;

D. executing an electric reaction layer drying step, to actively dry the electrochemical sensing portion or passively wait the electrochemical sensing portion for drying; and

E. executing a reaction slot sheltering step, to cover a cover on the baseboard corresponding to the inspection portion, to form a test opening on an outside end of the inspection portion, the liquid sample to be tested dropped in the inspection portion via the test opening;

wherein a part of the electrically conductive electrode portion is extended to outside of the cover and not sheltered by the cover.

12. The manufacturing method as defined in claim 11, wherein the polymer plastic which is hard to be surface metallized is a polymer plastic without mixing catalyst in advance.

13. The manufacturing method as defined in claim 11, wherein the polymer plastic capable of being surface metallized comprises the polymer plastic without mixing catalyst in advance and the polymer plastic mixing with catalyst in advance.

14. The manufacturing method as defined in claim 11, wherein the metal formed in the step B is Cu, Ni, Ag, Au, Sn, Ti, Pt, Pd, Rh, Ru, Ir, Cr, Fe, or Al or the combination thereof.

15. The manufacturing method as defined in claim 11, wherein the electrochemical sensing portion further comprises a hydrophilic layer, a biochemical reaction layer, or a hydrophilic biochemical reaction layer.

16. A method of manufacturing an electrochemical test strip, comprising:

A. executing a double injection molding step, to inject a polymer plastic capable of being surface metallized to form at least one electrically conductive electrode portion first, and then add catalyst on the electrically conductive electrode portion, and inject a polymer plastic which is hard to be surface metallized on lower side of the electrically conductive electrode portion to form a substrate, the substrate further having at least one inspection portion recessed from a side of a front surface thereof, a part of the electrically conductive electrode portion being extended into the inspection portion;

B. executing a surface metallization step, to perform a surface metallization on the electrically conductive electrode portion to be conductive;

C. executing an electric reaction layer coating step, to coat, drop or disperse the chemical test sample in the inspection portion to form an electrochemical sensing portion which can generate an electrical signal after contacting with the liquid sample to be tested;

D. executing an electric reaction layer drying step to actively dry the electrochemical sensing portion or passively wait the electrochemical sensing portion for drying; and

E. executing a reaction slot sheltering step to cover a cover on the baseboard corresponding to the inspection portion, to form a test opening on an outside end of the inspection portion, the liquid sample to be tested dropped in the inspection portion via the test opening; and

wherein a part of the electrically conductive electrode portion is extended to outside of the cover and not sheltered by the cover.

17. The manufacturing method as defined in claim 16, wherein the polymer plastic which is hard to be surface metallized is a polymer plastic without mixing catalyst in advance.

18. The manufacturing method as defined in claim 16, wherein the polymer plastic capable of being surface metallized comprises the polymer plastic without mixing catalyst in advance and the polymer plastic mixing with catalyst in advance.

19. The manufacturing method as defined in claim 16, wherein the metal formed in the step B is Cu, Ni, Ag, Au, Sn, Ti, Pt, Pd, Rh, Ru, Ir, Cr, Fe, or Al or the combination thereof.

20. The manufacturing method as defined in claim 16, wherein the electrochemical sensing portion further comprises a hydrophilic layer, a biochemical reaction layer, or a hydrophilic biochemical reaction layer.