WO2005124329A1 - センサチップ及びその製造方法 - Google Patents
センサチップ及びその製造方法 Download PDFInfo
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- WO2005124329A1 WO2005124329A1 PCT/JP2005/011323 JP2005011323W WO2005124329A1 WO 2005124329 A1 WO2005124329 A1 WO 2005124329A1 JP 2005011323 W JP2005011323 W JP 2005011323W WO 2005124329 A1 WO2005124329 A1 WO 2005124329A1
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- sensor chip
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/327—Biochemical electrodes, e.g. electrical or mechanical details for in vitro measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
Definitions
- the present invention relates to a sensor chip, particularly a biosensor chip, that can easily determine and detect a chemical substance contained in a sample.
- the present invention further relates to a method for manufacturing the sensor chip.
- the present invention also relates to a sensor chip manufactured by the manufacturing method of the present invention, particularly to a biosensor chip.
- a neurosensor chip introduces a small amount of sample into a reaction section in the chip, and in the chip, causes a biochemical reaction such as an enzyme reaction or an antigen-antibody reaction on the small amount of sample, and obtains the biochemical reaction.
- This is a sensor chip that outputs information to be output to the outside of the chip.
- This biosensor chip which utilizes the excellent molecular identification function of living organisms, has attracted attention as being capable of quick and simple measurement of trace amounts of chemical substances.For example, the amount of glucose in blood ( It is used as a blood sugar sensor for measuring blood sugar level) and urine sugar level, and a urine sugar level sensor for home health examinations (self-care) for self-management and prevention of diabetes mellitus.
- Japanese Patent Laid-Open Publication No. 10-2874 discloses an example of such a biosensor chip.
- This biosensor chip has a structure in which a sample is sucked from a hole on the chip and introduced into a reaction section.
- a sensor layer having a groove (hollow reaction section) is arranged on a substrate.
- a laminated biosensor chip on which a cover layer further provided with air holes is disposed (paragraph 0003).
- JP-A-11-94790 also discloses an example of a laminated biosensor chip.
- a substrate and a cover layer are laminated via an adhesive layer. The use of the agent layer as a spacer layer facilitates the manufacturing process.
- Such a laminated biosensor chip is formed by laminating a spacer layer that forms a hollow reaction portion on a substrate, and further laminating a cover layer thereon.
- the sublayer may be one or more spacer materials.
- the spacer material refers to a one-layer film constituting the spacer layer. Adhesive between the spacer material, substrate and cover layer Adhesive / adhesive is used, and adhesive / adhesive also becomes a single-layer film constituting the spacer layer, that is, a spacer material.
- the biosensor chip described in Japanese Patent Publication No. Hei 10-2874 and Japanese Patent Publication No. Hei 11-94790 Publication has a spacer layer laminated on a substrate, The cover layer is laminated on the substrate.
- the spacer layer forms a hollow reaction part between the substrate and the cover layer, and a sample is introduced into the reaction part to perform a biochemical reaction or the like. .
- a substrate or cover layer is bonded to a spacer layer, and a spacer material forming the spacer layer (one layer forming the spacer layer) is used.
- Films are mainly bonded together by a method of bonding with a double-sided tape coated with an adhesive or a method of applying an adhesive on the surface of a spacer material by screen printing or the like.
- Adhesives can be fixed simply by pressing, and do not require treatment such as heating or UV irradiation, so they are excellent in terms of productivity.
- enzymes and the like used in the biosensor chip may be sensitive to heat and UV.
- this adhesive material must be made of a material that is somewhat soft and easily deformed in order to increase its adhesiveness.Therefore, it is subject to changes over time due to residual stress applied during lamination and changes in environmental temperature, humidity, etc. Dimensions change and the thickness of the adhesive layer easily changes immediately
- Japanese Patent Application Laid-Open No. 11-94791 discloses a Noosensor chip in which a substrate and a power bar layer are directly bonded without interposing a spacer layer.
- the biosensor chip has a rising portion on the substrate, and the rising portion is bonded to the cover layer.
- this Noo sensor chip does not use a spacer layer, and the substrate and the cover layer are fixed only by the narrow adhesive portion between the rising portion and the cover layer.
- the entire surface of the cover layer other than the above-mentioned bonded portion becomes one surface of the hollow reaction portion, the volume of the reaction portion becomes larger and the amount of the required sample increases as compared with the case where the spacer layer is used. Then there is the problem.
- a biosensor chip using a spacer layer that is, a biosensor chip having a substrate, a cover layer, and a spacer layer sandwiched between the substrate and the cover layer, comprising a substrate, a cover layer
- a spacer layer that is, a biosensor chip having a substrate, a cover layer, and a spacer layer sandwiched between the substrate and the cover layer, comprising a substrate, a cover layer
- Japanese Patent Application Laid-Open No. 11-94791 discloses a substrate having a rising portion, and the rising portion allows the substrate and the cover layer to be directly adhered to each other without passing through a spacer layer, thereby forming a hollow reaction.
- a Noosensor chip forming a part is disclosed. Then, there is described an example in which enzymes are arranged on both surfaces of a substrate and a cover layer in the hollow reaction section (paragraph 021).
- the following excellent effects (1) to (3) can be obtained.
- a drug such as an enzyme
- the reaction time can be reduced.
- an enzyme or the like is placed in one place and a surfactant is placed in another place, even if the inlet for introducing the sample to the reaction section is small, this surfactant can be used to introduce the sample into the reaction section. Is extremely smooth, and the distribution of the sample in the reaction section is uniform, thereby shortening the inspection time and reducing the variation in the inspection.
- (3) By arranging heterogeneous enzymes that react to different chemical substances at two or more locations, A biosensor chip having a function of detecting a chemical substance can be manufactured.
- Japanese Patent Publication No. Hei 10-2874 and Japanese Patent Publication No. Hei 11-94791 disclose a spacer layer having a hollow reaction part on a substrate, and further include a cover layer. There is disclosed a stacked type noise sensor chip in which is disposed (paragraph 0003). Such a stacked biosensor chip is widely used because the size of the reaction part where the productivity is high can be reduced and the amount of the required sample can be reduced.
- the cover layer on the upper surface of the sensor chip and the substrate on the lower surface of the sensor chip are separately formed. Therefore, in order to arrange the chemicals on both the cover layer side and the substrate side of the hollow reaction part, it is necessary to apply each of them separately. Then, the number of processes is doubled, and productivity is significantly reduced. Therefore, it is difficult to arrange a drug such as an enzyme on both sides of the conventional stacked biosensor chip while maintaining high productivity, and it has been desired to solve this problem.
- Patent Document 1 Japanese published patent: Hei 10-2874
- Patent Document 2 Japanese published patent: Hei 11-94790
- Patent Document 3 Japanese published patent: Hei 11-94791
- the present invention is a sensor chip having a substrate, a cover layer, a spacer layer sandwiched between the substrate and the cover layer, and further having a hollow reaction portion between the substrate and the cover layer. It is an object of the present invention to provide a sensor chip which does not cause warpage due to changes in humidity or humidity or warpage over time. Another object of the present invention is to provide a method for manufacturing this sensor chip.
- the present invention relates to a sensor chip having a substrate, a cover layer, and a spacer layer sandwiched between the substrate and the cover layer, wherein an adhesive is used for bonding each layer. It is another object of the present invention to provide a sensor chip which does not cause a change in the volume of a reaction section due to a change with time or changes in environmental temperature, humidity, and the like.
- the present invention is obtained by laminating a substrate, a spacer layer having a hollow reaction portion, and a cover layer, and a laminate in which a drug is disposed on both the cover layer side and the substrate side of the hollow reaction portion.
- Type An object of the present invention is to provide a sensor chip manufacturing method capable of manufacturing a sensor chip with high productivity, and a sensor chip manufactured by the method.
- the present inventor has found that the structure of the sensor chip except for the electrodes (detection means) and the drug application section is made symmetrical with respect to the center plane in the cross-sectional direction of the laminate, thereby providing environmentally friendly products.
- the present inventors have found that a sensor chip that does not warp due to changes in temperature or humidity or warp over time can be obtained, and completed the present invention.
- the present invention has a substrate, a cover layer, and a spacer layer sandwiched between the substrate and the cover layer, and further comprises a hollow reaction section between the substrate and the cover layer and a detection means in the hollow reaction section.
- the substrate and the cover layer have the same material and thickness as each other, and the spacer is disposed on a plane parallel to the substrate and equidistant from the substrate and the cover layer. It is an object of the present invention to provide a sensor chip characterized in that the material and the shape of the layer are symmetric.
- a film of an insulating material is selected.
- the insulating material ceramics, glass, paper, biodegradable materials (for example, polylactic acid microorganism production) Polyester, etc.), polyvinyl chloride, polypropylene, polystyrene, polycarbonate, atarino resin, thermoplastic resin such as polybutylene terephthalate, polyethylene terephthalate (PET), thermosetting resin such as epoxy resin, UV A plastic material such as a cured resin can be exemplified.
- a plastic material such as polyethylene terephthalate is preferred because of its mechanical strength, flexibility, ease of chip production and calorie, especially ease of the following two-fold processing.
- a preferable range of the thickness of the substrate and the thickness of the cover layer, which are the same as each other, varies depending on the use of the sensor chip and the like, and is not particularly limited.
- a biosensor chip such as a blood glucose sensor, about 100 to 300 m. preferable.
- the sensor chip of the present invention also has a spacer layer sandwiched between the substrate and the cover layer. To be sandwiched means that one side of the spacer layer is bonded to the substrate and the other side is bonded to the cover layer. There may be an electrode layer between the spacer layer and the substrate or cover layer.
- the sensor chip of the present invention further has a hollow reaction portion between the substrate and the cover layer.
- the hollow reaction section is where the sample is introduced when the sensor chip is used, and the introduced sample undergoes a chemical reaction.
- This hollow reaction part can be formed by a groove of the spacer layer, and includes an electrode therein as described below.
- a biochemical reaction such as a catalyst or an enzyme is performed.
- the reagents for the reaction are immobilized therein, which facilitate the chemical reaction of the sample.
- a glucose biosensor chip for measuring the amount of glucose in blood
- a glucose oxidase layer for measuring the amount of glucose in blood
- a glucose oxidase electron acceptor (mediator) mixture layer for example, a glucose oxidase electron acceptor (mediator) mixture layer
- a glucose oxidase-albumin mixture layer Or a dark oxidase electron acceptor albumin mixture layer or the like is formed.
- These layers may be formed using an enzyme other than dalcosoxidase, for example, glucose dehydrogenase.
- a buffering agent, a hydrophilic polymer, or the like may be included in the drug as an additive.
- the fixing of the medicine may be performed before the grooves are formed by laminating a resist material to be described later, or after the formation of the grooves, the substrate, the spacer layer, and the like.
- This step may be performed before or after the hollow reaction section is formed by laminating the cover layer and the hollow reaction section. It is usually preferable to carry out the reaction after the formation and before the formation of the hollow reaction section.
- a sample to be measured for example, blood, urine, an aqueous solution sample extracted on a production line, or the like is introduced into the hollow reaction section through a sample introduction port.
- the sample introduction port may be provided on one of the substrate and the cover, and may be connected to the hollow reaction section through a sample introduction path, or the hollow reaction section may be opened on at least one side of the spacer layer. Alternatively, a sample inlet may be formed. A plurality of sample inlets may be provided.
- the sensor chip of the present invention further has a detecting means in the hollow reaction part.
- the detection means includes at least two or more electrode caps. These electrodes are generally called a working electrode and a counter electrode, but the detecting means may further include another electrode such as a reference electrode and other means.
- the electrode has a function of applying a predetermined voltage to the hollow reaction part, measuring a current value from the hollow reaction part, and the like. The substance is detected and quantified.
- the electrode is exposed in the hollow reaction part, and further, a lead wire portion of the electrode is formed in the substrate, the spacer layer or the force bar layer, or between these, and the electrode is exposed to the outside of the sensor chip. It is electrically conductive, and the application of a predetermined voltage, the measurement of a current value, and the like are performed through this lead wire portion.
- the sensor chip of the present invention is characterized in that the structure excluding the electrodes and the drug-applied portion is symmetrical with respect to the center plane in the cross-sectional direction of the laminate as an axis.
- This is achieved by a configuration in which the layers have the same material and thickness, and the material and shape of the spacer layer are symmetric with respect to the center plane in the cross-sectional direction.
- the center plane in the cross-sectional direction refers to a plane parallel to the substrate (and the cover layer) and equidistant from the substrate and the cover layer (hereinafter, simply referred to as a center plane).
- the materials and shapes are symmetric means that the thicknesses on both sides of the center plane are equal, and the materials at the same distance from the center plane are the same. Further, when a hollow portion such as a groove is provided in the spacer layer, it means that the shapes on both sides of the central surface of the hollow portion are mirror images of each other.
- the substrate, the cover layer, and the spacer layer are symmetric with respect to the center plane, the elongation of each layer due to changes in environmental temperature and humidity is also as described above. It is the same on both sides of the center plane, and therefore does not warp due to aging or the like.
- the electrode (detection means) and the drug are provided only on the substrate, the electrode layer and the drug layer are asymmetric components, but it has been found that no warping is caused in this case.
- the spacer layer is generally a laminate of one or more spacer materials.
- the material of the spacer material include the materials used for forming the above-mentioned substrate (or cover layer).
- the spacer layer (and the sheet layer described below) can be formed by laminating such a spacer material, or by applying a method such as screen printing and curing as necessary. Examples of the curing method include curing by heat and curing by UV. A preferable method is selected depending on the type of resin used.
- the bonding between the spacer materials is performed using an adhesive or an adhesive.
- the bonding of the spacer layer to the substrate and the cover layer is also performed using an adhesive and an adhesive. Adhesive used for bonding And the adhesive layer also serve as a spacer material, and constitute a spacer layer.
- the application of the adhesive material and the adhesive can also be performed by a method such as screen printing.
- the adhesive include a rubber-based adhesive, an acrylic-based adhesive, and a silicone-based adhesive.
- the adhesive include epoxy-based, vinyl acetate-based, and silicone-based adhesives.
- a thermosetting-type or UV-curing-type adhesive can be used as the type of curing.
- a resin layer called a resist layer is formed of a resist material on a substrate (or a cover layer) so as to cover the electrodes (and lead wires thereof) other than the portions exposed to the corresponding portions.
- the resist material urethane resin, epoxy resin, modified polyimide resin, acrylic resin, or the like is used. This resist layer also becomes a spacer material, and forms a spacer layer.
- each spacer material may have a different material, thickness, etc. under the following conditions. It may be different.
- two spacer materials equidistant from the center plane are provided on both sides of the center plane. Are of the same thickness and material.
- Such a spacer layer is a sheet layer having a groove, which is the same in material, thickness, and groove position, so that the grooves overlap with each other, and the bonding surface is It is obtained by laminating so as to be symmetric.
- the sheet layer is a layer constituting the spacer layer, and refers to each layer on both sides of the center plane, and may be a single layer spacer material force, or In some cases, the laminate may be composed of a plurality of laminated materials.
- the sheet layer should be formed by applying and curing a resist material, adhesive material, adhesive, etc. on the substrate, laminating the spacer material on the substrate, or laminating multiple layers of the spacer material. Can be.
- a resist material, an adhesive or an adhesive is used for lamination of the spacer material, and the layer of the resist material, the adhesive and the adhesive also becomes a spacer material and forms a sheet layer.
- the space obtained by overlapping the grooves forms a hollow reaction part. In order to be able to overlap the grooves, the grooves need to have a mirror image relationship with each other.
- each groove Is preferably linear.
- the present invention is a sensor chip, wherein the spacer layer is formed by laminating a pair of sheet layers each having a groove and also serving as a single layer or a plurality of layers of spacer material.
- the spacer layer is formed by laminating a pair of sheet layers each having a groove and also serving as a single layer or a plurality of layers of spacer material.
- the sensor chip of the present invention includes, for example, a sheet layer bonded to a substrate sheet on which a substrate and a cover layer are formed, and the sheet layer is centered on a folding line that substantially divides the substrate sheet into two equal parts. It can also be obtained by folding in two so that the layers face each other.
- the substrate sheet on which the substrate and the cover layer are formed refers to a member that becomes the substrate and the cover layer after the formation of the sensor chip.
- the method of folding in two around the fold line includes the method of folding in two at the position of the fold line and the position of two straight lines parallel to the fold line and equidistant from the fold line. And a method of bending so that the cross section becomes a U-shape.
- An adhesive / adhesive is used for laminating the sheet layers or laminating the sheet layer on the substrate sheet.
- the adhesive / adhesive layer also becomes a spacer material, and the spacer layer is formed. Constitute. Since the layer located on the center plane is neutral to warpage, it does not matter even if it is not paired. Therefore, the layer of the adhesive / adhesive used for bonding between the sheet layers is not required. It does not have to be paired. Of course, it is also possible to make the spacer material on the uppermost surface of the sheet layer have an adhesive function, and to bond them without using an adhesive material or an adhesive.
- the sheet layer has a pair of grooves symmetrical with respect to the folding line as an axis, and is bonded to the base sheet so as to include a detecting means, ie, an electrode, in at least one of the grooves. . Therefore, by folding the groove around the folding line, the grooves overlap, and a hollow reaction section including the detection means (electrode) is formed therein.
- the present invention relates to a sensor chip, wherein a pair of symmetrical relations is formed on a substrate sheet on which the substrate and the cover layer are formed, with a folding line dividing the substrate sheet into approximately two equal parts as an axis.
- each groove is preferably a straight line that is parallel to the bending line and equidistant.
- the present invention also provides a sensor chip, wherein the pair of groove forces are linear in parallel with each other.
- the sensor chip of the present invention is suitably used as a biosensor chip, particularly as a blood glucose sensor for measuring the amount of glucose (blood glucose) or urinary glucose in blood, a urinary glucose sensor, or the like.
- the present invention provides a sensor chip, which is a biosensor chip.
- the present invention further provides a method for manufacturing the above-described sensor chip. That is, the production of a sensor chip having a substrate, a force bar layer, a spacer layer sandwiched between a substrate and a cover layer, and further having a hollow reaction section between the substrate and the cover layer and a detecting means in the hollow reaction section.
- a method comprising: forming a detecting means on a substrate sheet on which the substrate or the cover layer is formed; and detecting the sheet layer having a groove and also having a single layer or a plurality of spacer materials.
- the laminated body 1 obtained by forming the means so as to be included in the groove, the laminated body 1, and the laminated body 2 having the same material, thickness, and configuration of the substrate sheet and the sheet layer are both sheeted.
- An object of the present invention is to provide a method for manufacturing a sensor chip, characterized in that the layers are opposed to each other, and the two grooves are overlapped with each other so as to form a hollow reaction portion.
- the same configuration means that the number of spacer materials (including an adhesive layer, etc.) constituting the sheet layer, their materials, their lamination order, and the groove positions, sizes, and shapes are the same or mirror images. Say that they are in a relationship.
- an adhesive or an adhesive may be used, or the uppermost layer of the sheet layers may be made to have tackiness and directly laminated.
- the laminated body 2 may be formed without forming the detecting means.
- the present invention has a hollow layer, a substrate, a cover layer, and a spacer layer sandwiched between the substrate and the cover layer, and further includes a hollow reaction section between the substrate and the cover layer and in the hollow reaction section.
- Detection A method of manufacturing a sensor chip, comprising: forming a detection means on a substrate sheet on which the substrate and a cover layer are formed; and further comprising a spacer material or a laminate of a plurality of spacer materials. Layers having a pair of grooves that are symmetrical about a folding line that divides the substrate sheet into approximately two equal parts, and stacked such that at least one groove includes a detecting means therein.
- a manufacturing method is provided. In this method, a pair of grooves of the sheet layer are symmetrical about the folding line, and the sheet layer is folded in two around the folding line. As a result, the grooves also overlap, forming a hollow reaction part.
- the present inventor has found that the above-mentioned problem can be achieved by strongly bonding the substrate and the cover layer to each other at one end thereof and fixing the gap so that the distance therebetween does not fluctuate.
- the present invention has been completed.
- the present invention provides a sensor having a substrate, a cover layer, a spacer layer sandwiched between the substrate and the cover layer, and further having a hollow reaction section between the substrate and the cover layer and a detecting means in the hollow reaction section.
- a sensor chip wherein the substrate and the cover layer are bonded to each other at one end thereof and are integrally formed.
- Different materials may be used for the substrate and the cover layer as long as they can be strongly bonded to each other. It is preferable to use the same material to easily achieve strong bonding between the two.
- a film of an insulating material is selected, and as the insulating material, ceramics, glass, paper, a biodegradable material (for example, polyester produced by microbial polylactic acid), polychlorinated vinyl, polypropylene, polystyrene, Examples thereof include thermoplastic resins such as polycarbonate, acrylic resin, polybutylene terephthalate, and polyethylene terephthalate (PET); thermosetting resins such as epoxy resins; and plastic materials such as UV-curable resins.
- Plastic materials such as PET are preferred because of their mechanical strength, flexibility, and ease of chip fabrication and processing, particularly ease of the following two-fold processing.
- the thicknesses of the substrate and the cover layer may be the same or different.
- the preferred range of these thicknesses varies depending on the use of the sensor chip, and is not particularly limited. In the case of a biosensor chip such as a blood glucose sensor, the thickness is preferably about 100 to 300 ⁇ m.
- the sensor chip of the present invention also has a spacer layer sandwiched between the substrate and the cover layer.
- a spacer layer sandwiched between the substrate and the cover layer.
- To be sandwiched means that one side of the spacer layer is bonded to the substrate and the other side is bonded to the cover layer.
- an adhesive such as a double-sided tape is used.
- the adhesive even when the adhesive is used, a change in the thickness of the chip due to aging or the like is suppressed.
- the spacer layer may be made of a single-layer spacer material, or may be a laminate of a plurality of layers of spacer materials. Each spacer material in a plurality of layers of spacer materials may be different from each other.
- the same materials as those exemplified as the materials used for the substrate and the cover layer can be exemplified.
- these materials and adhesives are applied on the substrate or other spacer material by a method such as screen printing, and then the uppermost spacer material and the cover layer are bonded to each other.
- a spacer layer sandwiched between the layers can be formed.
- an adhesive material can be used for bonding the spacer materials.
- the adhesive material is used.
- variation in the thickness of the chip due to aging or the like is suppressed.
- the sensor chip of the present invention further has a hollow reaction portion between the substrate and the cover layer.
- the hollow reaction section is where the sample is introduced when the sensor chip is used, and the introduced sample undergoes a chemical reaction.
- This hollow reaction part can be formed by a groove of the spacer layer, and includes an electrode therein as described below.
- a biochemical reaction such as a catalyst or an enzyme is performed.
- the reagents for the reaction are immobilized therein, which facilitate the chemical reaction of the sample.
- a glucose biosensor chip for measuring the amount of glucose in the blood, a glucose oxidase (GOD) layer, a glucose oxidase electron receptor (mediator) mixture layer, An oxidase albumin mixture layer or a dalcosoxidase electron acceptor albumin mixture layer is formed.
- Enzymes other than glucose oxidase such as glucose dehydrogenase (GDH)
- GDH glucose dehydrogenase
- buffers and hydrophilic polymers may be included in the drug as additives.
- a sample to be measured for example, blood, urine, an aqueous solution sample extracted on a production line, or the like is introduced into the hollow reaction section through a sample introduction port.
- the sample introduction port may be provided on one of the substrate and the cover, and may be connected to the hollow reaction section through a sample introduction path, or the hollow reaction section may be opened on at least one side of the spacer layer. Alternatively, a sample inlet may be formed. A plurality of sample inlets may be provided.
- the sensor chip of the present invention further has a detecting means in the hollow reaction section, that is, is exposed in the reaction section.
- the detecting means also has at least two or more electrode forces. These electrodes are usually referred to as a working electrode and a counter electrode, and the force detecting means may further include other electrodes such as a reference electrode and other means.
- the electrodes perform functions such as applying a predetermined voltage to the hollow reaction section and measuring the current value from the hollow reaction section. Based on signals from the electrodes, detection and quantification of chemical substances in the sample are performed. Is performed.
- the electrodes are exposed in the hollow reaction portion, and further, a lead wire portion of the electrodes is formed in the substrate, the spacer layer or the force bar layer, or between them, and the sensor chip outer portion is formed. It is electrically conductive, and the application of a predetermined voltage, the measurement of a current value, and the like are performed through this lead wire portion.
- the sensor chip of the present invention is characterized in that the substrate and the cover layer are bonded to each other at one end thereof and are integrally formed. Being combined and integrated means that they are combined so that the positional relationship between them does not change. Therefore, the distance between the substrate and the cover layer is fixed at this portion and does not change. As a result, the fluctuation in the distance between the substrate and the force bar layer in the hollow reaction part is also suppressed, and the change in the volume of the reaction part due to a change with time or a change in environmental temperature, humidity, etc., which is a problem in the conventional technology, is also suppressed. .
- the hollow reaction section is provided at a position closer to one end than the center of the sensor chip. Therefore, as the one end, an end closer to the hollow reaction part is selected, and when the substrate and the cover layer are strongly connected and integrated at this end, the volume change of the hollow reaction part can be more effectively suppressed. It is preferable.
- a method of obtaining a substrate and a cover layer which are combined and integrated with each other at one end is particularly Not limited.
- the substrate and the cover layer are formed of a thermoplastic resin
- a method in which both are melt-bonded at this portion may be used, and a method in which both are bonded with a strong adhesive may also be used.
- a method of folding a substrate sheet around a folding line that divides one substrate sheet into approximately two equal parts, and using one of the folding lines as a substrate and the other as a cover layer is known as a sensor chip. It is preferred because it is easy to produce and a stable and strong bond can be obtained.
- the present invention corresponds to a sensor chip obtained by such a preferred method, and is a sensor chip as described above, wherein the substrate and the cover layer force are centered on a bending line that substantially divides one substrate sheet into two equal parts.
- An object of the present invention is to provide a sensor chip characterized by being formed by folding a substrate sheet in two.
- the method of folding in two around the fold line includes the method of folding in two at the position of the fold line and the position of two straight lines parallel to the fold line and equidistant from the fold line.
- a method of bending the cross section so as to have a U-shape is also included.
- the sensor chip of the present invention is suitably used as a biosensor chip, particularly as a blood glucose sensor, a urinary glucose sensor, or the like for measuring the amount of glucose (blood glucose) or urinary glucose in blood.
- the present invention which corresponds to such a preferred embodiment, provides the sensor chip described above, which is a biosensor chip.
- the sensor chip is characterized in that the substrate and the cover layer are formed by folding the substrate sheet in two around a fold line that substantially divides one substrate sheet into two equal parts. More preferably, it is manufactured by the following method.
- the present invention also provides a method for manufacturing a sensor chip corresponding to these preferred embodiments.
- the present invention has a substrate, a cover layer, and a spacer layer sandwiched between the substrate and the cover layer, and further includes a hollow reaction section between the substrate and the cover layer and a detection means in the hollow reaction section.
- a method for manufacturing a sensor chip comprising: a detecting means formed on at least one side of a bending line on a single substrate sheet, which substantially divides the substrate sheet into two equal parts; Then, the substrate sheet is folded in two, and then a spacer layer having a groove is inserted between the two folded substrate sheets, and the spacer layer and the folded substrate sheet are bonded and laminated.
- a method for manufacturing a sensor chip characterized by obtaining a body.
- the present invention has a substrate, a cover layer, a spacer layer sandwiched between the substrate and the cover layer, and further comprises a hollow reaction section between the substrate and the cover layer, and a detection means in the hollow reaction section.
- a method of manufacturing a sensor chip comprising: forming a detecting means and forming a sensor layer having a groove on at least one side of a folding line on a single substrate sheet that substantially divides the substrate sheet into two equal parts. After the formation, the substrate sheet is folded in two around the folding line, and the spacer layer and the other side of the substrate sheet are bonded to obtain a laminated body.
- a manufacturing method is provided.
- the one substrate sheet on which the detection means is formed is folded into two so as to be approximately equally divided into two to produce an integrated substrate, and the hollow reaction portion is provided between the two folded substrates.
- Another method of the present invention is a method in which a hollow reaction is applied to one side of a line that substantially bisects one substrate sheet on which a detection unit is formed. After forming a spacer layer having a portion, the spacer layer is folded in two along this line, and the spacer layer and the substrate are bonded to each other.
- the spacer layer may be formed by lamination before folding or insertion after folding.
- the spacer layer is inserted after being folded in two, it is difficult to insert the adhesive if there is an adhesive material in the bonded portion of the substrate, the cover layer and the Z or the spacer layer before the insertion. Therefore, it is desirable to use a thermosetting or UV-curable adhesive or the like instead of the adhesive, apply heat or UV irradiation after insertion, and bond and fix the spacer layer with the substrate and the cover layer.
- a substrate sheet made of thermoplastic resin is used in any of the method of laminating the spacer layer before folding the substrate sheet into two, and the method of inserting the spacer layer after folding the substrate sheet. It is preferable to heat-treat the folded part. By this heat treatment, the residual stress due to the bending is eliminated, and this portion is fixed, so that the effect of suppressing a change in the positional relationship between the substrate and the cover layer due to the time and the like is increased.
- the present invention relates to a method for manufacturing a sensor chip, wherein the substrate sheet is formed of a thermoplastic resin, and after the substrate sheet is folded in two, the folded part is heat-treated. It provides a manufacturing method.
- folding in two includes a method of bending the section so as to have a U-shaped cross section.
- a thermoplastic resin such as PET as the substrate sheet.
- a method of bending a sheet made of thermoplastic resin by applying heat to the sheet and pressing the sheet into a U-shape as in press molding is particularly preferable because it can be manufactured accurately and economically. Good.
- bending If the bending is performed, the bending accuracy is further improved. Note that, in order to keep the fixing strength between the substrate and the cover layer high, it is preferable to perform the treatment with a groove rather than the method of forming a hole.
- a drug composed of an enzyme or the like is fixed on a substrate or a cover layer in the hollow reaction part.
- such fixing of the drug can be performed either before or after folding in two.
- the heat treatment temperature of the thermoplastic resin is desirably a temperature that is equal to or higher than the temperature between the resin softening temperature (glass transition temperature) and the melting point and equal to or lower than the melting point. ⁇ ⁇ If the temperature is lower than the middle point between the softening temperature and melting point, the bending state may not be enough to eliminate the residual stress in the two-folded part and may change over time. On the other hand, if the melting point is exceeded, deformation of the resin becomes large, and it may not be possible to maintain a clean bent surface.
- the resin temperature of PET resin is about 70 ° C and the melting point is about 250 ° C.
- the heat treatment temperature of the folded part is 160 ° C or more. 250 ° C or less is desirable.
- Representative PET resins include Melinex Petetron (trade name, manufactured by Teijin Dupont Film Co., Ltd.), Lumira (trade name, manufactured by Toray Industries, Inc.), and the like.
- enzymes such as GOD and GDH may degrade at a temperature of 60 ° C or higher, so in the case of a Noosensor chip using these, make sure that the fixed part of the enzyme does not exceed 60 ° C. Adjust heat treatment temperature It is desirable to take measures such as separating the hollow reaction part from the bending line by a sufficient distance.
- the above-described manufacturing method is performed while forming a large number of sensor means using one large sheet of substrate corresponding to a large number of sensor chips. After forming on a sheet, it is preferable to cut each sensor chip. According to this method, productivity is improved, and a large number of sensor chips are manufactured in a series of steps, so that variations in the volume of the reaction section can be prevented.
- one set of detecting means refers to a set of electrodes corresponding to one detecting means of an individual sensor chip, and includes at least two electrodes called a working electrode and a counter electrode.
- the above-described folding, formation of a spacer layer, insertion of a spacer layer, and the like are performed, so that a large number of sensor chip force bending lines are formed. A laminate connected in parallel in the direction is obtained.
- each chip that is cut includes at least one set of detection means.
- a large number of sets of detecting means are formed while being arranged in the direction of the bending line, and the obtained laminated body is provided with at least one set of detecting means in each sensor chip. It is another object of the present invention to provide a method of manufacturing a sensor chip, characterized in that the sensor chip is cut along one or more straight lines perpendicular to the bending line so as to be included.
- the present invention provides a cell having a two-folded substrate, a spacer layer sandwiched between the substrates, and further having a hollow reaction part between the substrates and a detecting means in the hollow reaction part.
- a method for manufacturing a sensor chip comprising: A sheet layer having at least one pair of groove pairs having a line symmetry relationship with each other with the bending line to be equally divided as an axis is laminated so that at least one of the grooves includes the detection means, and a laminate 1 is obtained.
- the sensor chip manufactured by the manufacturing method of the present invention has a folded substrate, a spacer layer sandwiched between the substrates, and further has a hollow reaction part and a hollow counterpart between the substrates.
- 4 is a sensor chip having a detecting means in a response portion.
- the folded substrate corresponds to the substrate and the cover layer of the conventional stacked sensor chip. Since the substrate and the cover layer have a single substrate strength, they are joined at one end, and both have the same material and thickness. As the material of the substrate, a film of an insulating material is selected.
- the insulating material ceramitas, glass, paper, biodegradable materials (for example, polylactic acid microorganism-producing polyester, etc.), polyvinyl chloride, polypropylene, polystyrene And plastic materials such as thermoplastic resins such as polycarbonate, acrylic resin, polybutylene terephthalate, and polyethylene terephthalate (PET); thermosetting resins such as epoxy resins; and UV-curing resins.
- a bendable plastic material such as PET is preferable because of its mechanical strength, flexibility, and ease of chip fabrication and processing, especially ease of folding.
- the preferred range of the thickness of the substrate varies depending on the use of the sensor chip, and is not particularly limited. However, when a biosensor chip such as a blood glucose sensor is manufactured, it is preferably about 100 to 300 m.
- this substrate When this substrate is expanded, it is folded in two around a fold line that divides it approximately into two, and a spacer layer is sandwiched between each of the two folded substrates.
- the method of folding in two around the fold line includes the method of folding at the position of the fold line and the cross-section at the position of two straight lines parallel to the fold line and equidistant from the fold line. It also includes a method of bending so as to form a U-shape.
- the spacer layer is interposed between the two folded substrates.
- a hollow reaction part is formed between each of the two folded substrates.
- the hollow reaction section is where the sample is introduced when the sensor chip is used, and the introduced sample undergoes a chemical reaction.
- This hollow reaction part can be formed by a groove of the spacer layer, and contains an electrode therein, and a catalyst such as a catalyst or an enzyme is fixed therein, as described below. Then, the chemical reaction of the sample is accelerated.
- the drug is disposed on the upper and lower surfaces of the hollow reaction part, that is, on each side of a pair of grooves formed on the folded substrate.
- an agent such as a catalyst or an enzyme to be disposed is an agent for causing a biochemical reaction, and includes various auxiliaries for facilitating the biochemical reaction. May be used. More specifically, in the case of a glucose biosensor chip for measuring the amount of glucose in blood, glucose oxidase (GOD), a mixture of glucose oxidase electron acceptor (mediator), a mixture of glucose oxidase albumin, and An example is a mixture of an oxidase electron acceptor albumin and the like. Also, enzymes other than glucose oxidase, such as glucose dehydrogenase (GDH), may be mentioned. Buffers and hydrophilic polymers may be included in the drug as additives.
- GDH glucose dehydrogenase
- a sample to be measured for example, blood or urine, an aqueous solution sample drawn on a production line, or the like is introduced into the hollow reaction section through a sample introduction port.
- the sample introduction port may be provided on one of the substrate and the cover, and may be connected to the hollow reaction section through a sample introduction path, or the hollow reaction section may be opened on at least one side of the spacer layer. Alternatively, a sample inlet may be formed. A plurality of sample inlets may be provided. In particular, it is desirable that the hollow reaction section traverses the spacer layer and that the openings at both ends serve as sample introduction ports. With such a straw shape, introduction of the reagent into the hollow reaction part can be facilitated by utilizing the capillary phenomenon.
- the sensor chip manufactured by the manufacturing method of the present invention further has detection means in the hollow reaction part.
- the detecting means also has at least two or more electrode forces. These electrodes are usually referred to as a working electrode and a counter electrode, and the force detecting means may further include other electrodes such as a reference electrode and other means.
- the electrode has a function of applying a predetermined voltage to the hollow reaction part, measuring a current value from the hollow reaction part, and the like. The number of chemical substances in a sample can be detected and quantified based on the number.
- the electrode is exposed in the hollow reaction portion, but a lead wire portion of the electrode is further formed in the substrate, the spacer layer, or between these, to electrically connect with the outside of the sensor chip. Conduction is enabled. A predetermined voltage is applied, a current value is measured, and the like through the lead wire portion.
- the above-described detecting means is usually formed on the substrate before being folded in half.
- the detection means can be formed by screen printing, plating, vapor deposition, attaching a metal tape, or the like.
- the formation of the detecting means may be performed on only one side of the bending line, or may be performed on both sides.
- one set of detecting means is a set of electrodes included in one sensor chip, and has at least two working electrodes and a counter electrode.
- a sheet layer is laminated on the substrate on which the detection means is formed, and a laminate 1 is obtained.
- the sheet layer is made of a single-layer spacer material or a laminate of a plurality of spacer materials. In the present invention, two sheet layers are bonded to form a spacer layer. I do.
- the spacer material is a single-layer film that forms the spacer layer.
- the sheet layer has one or more pairs of grooves, which are in line symmetry with each other about the folding line, that is, two or more.
- the lamination of the substrate and the sheet layer is performed such that at least one of the grooves of the sheet layer includes the detection means, that is, the electrodes are exposed in the grooves.
- this sheet layer since two or more grooves are present on the same plane, two or more grooves can be formed in the same step, and productivity can be increased as compared with the case where they are formed separately. Can be done.
- a tape having an adhesive layer may be attached to the substrate on which the detection means is formed, and both grooves may be formed.
- a method of applying resin by screen printing or the like is capable of laminating a sheet layer having one or more grooves on a substrate in one step, that is, one application, which is preferable in terms of productivity.
- two or more grooves can be easily formed by simply changing the shape of the printing plate with the same process load as in forming one groove.
- lamination of a sheet layer having at least one pair of grooves having a line-symmetric relationship with each other with the bending line as an axis is performed in one step by applying resin on the substrate. It is intended to provide a method of manufacturing a sensor chip characterized by the above.
- a chemical such as a catalyst or an enzyme is applied to a position on the substrate corresponding to the groove.
- the manufacturing method of the present invention is characterized in that a drug is simultaneously applied to portions corresponding to the at least two grooves.
- the application of the drug to the two locations is performed separately, resulting in low productivity.
- the above-described configuration enables simultaneous application at two locations, and as a result, excellent productivity is achieved.
- Either of the step of laminating the sheet layer and the step of applying the medicine may be performed first.
- a step of applying a drug is performed first, and is a method for manufacturing a sensor chip.After the step of applying a drug, a sheet layer having a pair of grooves is formed and a laminate 1 is formed.
- An object of the present invention is to provide a method of manufacturing a sensor chip, characterized by performing an obtaining step. In this method, a sheet layer is formed around the periphery of the sheet after the application of the agent by, for example, attaching a member of the sheet layer or applying a resin.
- the step of laminating the sheet layers is performed first, which is a method for manufacturing a sensor chip, in which a sheet layer having a pair of grooves is formed to form a laminate 1 It is intended to provide a method for manufacturing a sensor chip, characterized by performing a step of applying a drug after the step of obtaining. According to the method in which the step of laminating the sheet layers is performed first, before folding in two, The area of the reaction zone becomes clear. Therefore, the application area and application position of the drug can be easily defined before application, so that the viewpoint of ease of production is preferable and a high quality biochip is preferable.
- a pair of grooves in the sheet layer which are in line symmetry with each other about the folding line, are two parallel straight lines that are equidistant from each other at the bending line force before folding.
- the grooves are preferred.
- simultaneous application can be performed at the positions corresponding to the two grooves with a simple structure of the application machine in which the two nozzles are fixed. That is, in this case, for example, one applicator having two nozzles for the upper surface and the lower surface is used, and the two nozzles are simply fixed and arranged, and the applicator or the laminate is parallelized. It is extremely economical because the chemical can be applied to both application surfaces simultaneously by simply moving it.
- the present invention provides a method for manufacturing a sensor chip, wherein the grooves forming the pair are parallel to each other and linear.
- the chemicals applied to two or more grooves may be the same or different.
- an enzyme when an enzyme is applied to one side and a surfactant is applied to one side, the introduction of the sample into the reaction layer becomes extremely smooth even when the sample introduction port is small, and the distribution of the sample in the reaction section becomes uniform. As a result, the inspection time is shortened and the variation in the inspection is reduced. Further, when the same enzyme is applied to both surfaces, the contact area between the reagent and the enzyme can be increased, so that the reaction time between the reagent and the enzyme can be reduced. In addition, when different types of enzymes that react with different chemical substances are applied to both surfaces, a biochip having a plurality of reagent detection functions can be created.
- different chemicals can be applied to the above-described application machine only by using different nozzles for different chemicals without increasing the load in the process.
- a method for manufacturing a sensor chip is provided in which different chemicals are simultaneously applied to positions corresponding to respective grooves forming a pair. .
- a large number of sets of detection means are formed so as to be parallel to the direction of the folding line.
- the substrate has a size and a shape capable of forming a large number of sets of detecting means in parallel with the direction of the bending line.
- the size of the sheet layer, the position where the medicine is applied, and the like also correspond to this size.
- each individual sensor chip By cutting this laminate along one or more straight lines perpendicular to the bending line, each individual sensor chip is separated, and a large number of sensor chips are obtained. The cutting is performed such that each cut individual sensor chip includes at least one set of detection means. That is, the present invention relates to a method for manufacturing a sensor chip, in which a detecting means formed on a substrate is a force of a plurality of sets of detecting means arranged in parallel in the direction of the bending line, and the formed laminate 2 is formed. Providing a method of manufacturing a sensor chip, further comprising a step of cutting along one or a plurality of straight lines perpendicular to the bending line so that at least one set of detection means is included in each of the detection means. Things.
- the cutting into individual sensor chips is performed by folding the sheet into two pieces, and the force is applied after the sheet layers are bonded to each other. It can be prevented from entering as a fold, and the folding process can be completed only once, which is advantageous in productivity. Also in this method of manufacturing a large number of sensor chips, it is preferable that the groove or the application portion of the medicine located at the position corresponding to the groove is straight. In this way, for the same reason as described above, the operation of the coating machine is easy, and the amount of movement of the nozzle can be minimized and the nozzle can be moved smoothly. be able to.
- a plurality of sets each having a large number of detecting means arranged in parallel in the direction of the folding line are further formed in a direction perpendicular to the folding line, and the sets described above are formed thereon.
- the sheet is cut in the direction of the folding line to separate each set, and then each set is folded in two. Furthermore, a method of cutting into individual sensor chips can be adopted as a method with higher productivity.
- the present invention further provides a sensor chip manufactured by the above manufacturing method. That is, the present invention corresponds to this sensor chip.
- This sensor chip is suitably used as a biosensor chip, particularly as a blood glucose sensor, a urinary glucose sensor, or the like for measuring the amount of glucose (blood glucose) or urinary glucose in blood.
- Claim 9 corresponds to this preferred embodiment, and provides the sensor chip, wherein the sensor chip is a biosensor chip.
- the sensor chip of the present invention has a symmetrical structure with respect to the center plane of the stack, and as a result, no warpage occurs in the cross-sectional direction, the appearance is good, and the adhesive layer It is a highly reliable sensor chip that is free from interface peeling and fluctuations in measured values. In particular, it can be suitably used as a biosensor chip such as a blood sugar level sensor. According to the method for manufacturing a sensor chip of the present invention, such an excellent sensor chip can be easily manufactured.
- the sensor chip of the present invention is a sensor chip having a substrate, a cover layer, and a spacer layer sandwiched between the substrate and the cover layer.
- the force substrate and the cover layer are integrated with each other. Since the positional relationship between the substrates is firmly fixed, the distance between the substrate and the cover layer does not fluctuate even if an adhesive is used for bonding each layer, etc., and changes over time, environmental temperature, humidity, etc.
- the volume of the reaction part is not easily changed by the change. Since the volume of the reaction zone is stable, the measurement results using it are also stable and highly reliable.
- the sensor chip of the present invention can be easily manufactured by the manufacturing method of the present invention.
- a large number of sensor chips were formed on a single substrate sheet.
- the sensor chip can be produced economically with high accuracy.
- the sensor chip thus obtained can be suitably used as a biosensor chip such as a blood glucose sensor.
- Type sensor chips can be manufactured with high productivity.
- the drug can be applied to both surfaces of the hollow reaction portion in the same step, and the problem of the prior art is that the application of the drug to two places causes a decrease in productivity. There is no.
- FIG. 1 is an explanatory view showing an example of a sensor chip of the present invention and a method of manufacturing the same.
- FIG. 2 is an explanatory view showing another example of the sensor chip of the present invention and a method of manufacturing the same.
- FIG. 3 is an explanatory view showing another example of the method for manufacturing a sensor chip of the present invention.
- FIG. 4 is a schematic sectional view showing one example of a sensor chip of the present invention.
- FIG. 5 is a plan view showing one step of an example of the production method of the present invention.
- FIG. 6 is a side view showing one step of an example of the production method of the present invention.
- FIG. 7 is a side view showing one step of an example of the production method of the present invention.
- FIG. 8 is a side view showing one step of another example of the production method of the present invention.
- FIG. 9 is a plan view showing a substrate used in the manufacturing method of the present invention.
- FIG. 10 is a side view showing a substrate used in the manufacturing method of the present invention.
- FIG. 11 is a plan view showing one step of the manufacturing method according to the present invention.
- FIG. 12 is a plan view showing one step of the manufacturing method according to the present invention.
- FIG. 13 is a side view showing one step of the production method of the present invention.
- FIG. 14 is a side view showing a biosensor chip of the present invention.
- FIG. 1 shows one embodiment of the sensor chip of the present invention and a method of manufacturing the same.
- FIG. 1 (a) is a plan view showing a state in which an electrode 2 (detection means) is formed on a substrate sheet 1.
- the electrode 2 is composed of two electrodes and corresponds to a working electrode and a counter electrode, respectively.
- FIG. 1B is a side view showing a state in which the electrodes 2 are formed on the substrate sheet 1.
- the electrode 2 also has a carbon ink force and is formed on the substrate sheet 1 made of PET by screen printing.
- the dashed line in FIG. 1 (a) indicates the position corresponding to the spacer material to be bonded later, and accordingly, the two dashed lines on the right correspond to the groove, that is, the hollow reaction portion formed later. Indicates the position to be performed.
- an adhesive 3 which is a rubber-based adhesive is applied to the substrate sheet 1 and the electrode 2 by screen printing, and a spacer material 4 made of PET is further applied thereon, and the adhesive is applied thereto.
- a laminate A shown in (c) is formed.
- the spacer material 4 has a groove 5, and the electrode 2 is included in the groove 5.
- the medicine 6 is further applied on the electrode 2 in the groove 5.
- the sheet layer of the laminate A is composed of the adhesive material 3 and the spacer material 4.
- an adhesive 3 ′ having the same composition as the adhesive 3 is applied so as to have the same thickness as the adhesive 3.
- a spacer material 4 ' having the same composition as the adhesive 3 is applied so as to have the same thickness as the adhesive 3.
- a spacer material 4 'having a groove 5' and having the same material and thickness as the spacer material 4 is bonded to form a laminate B shown in FIG. 1 (d).
- the sheet layer of the laminate B is composed of an adhesive material 3 'and a spacer material 4'.
- an adhesive material is applied and a spacer material is bonded to obtain a laminated body, and the obtained laminated body is cut into approximately two equal parts, and each of the above is cut into two parts.
- the laminate A and the laminate B may be used.
- the laminate A and the laminate B obtained as described above are laminated by laminating a spacer material 4 and a spacer material 4 with an adhesive 3 "
- the sensor chip of the present invention is obtained by the following formula:
- the adhesive material 3 ′′ is formed on one of the spacer material 4 and the spacer material 4 ′ by screen printing.
- This sensor chip consists of a substrate consisting of substrate sheet 1, a substrate It is composed of a cover layer composed of the sheet 1 ′ and a spacer layer composed of the spacer materials 4, 4 ′ and the adhesive materials 3, 3 ′, 3 ′′, and has a structure symmetric about the central plane 9. The warp does not occur with the passage of time, etc.
- the groove 5 and the groove 5 ′ are superimposed to form a hollow reaction part 7. Then, a sample is introduced into this part, and a reaction occurs. The reaction is detected by the electrode 2, and the signal is output to the outside by the electrode 2.
- FIG. 2 shows another embodiment of the sensor chip of the present invention and a method of manufacturing the same.
- FIG. 2A is a plan view showing a state in which electrodes 22 (detection means) are formed on a substrate sheet 21 made of PET.
- the electrode 22 is formed only on one side of the fold line 28 that substantially divides the substrate sheet 21 into two equal parts.
- the electrode 22 has a carbon ink force and is formed on the substrate sheet 21 made of PET by screen printing.
- the electrode 22 is composed of two electrodes and corresponds to a working electrode and a counter electrode, respectively.
- the dashed line in FIG. 2 (a) indicates a position corresponding to a resist material (a spacer material) to be formed later by coating and curing.
- FIG. 2B is a side view showing a state in which the electrodes 22 are formed on the substrate sheet 21.
- a resist material 24 having a thermosetting epoxy resin is applied on the substrate sheet 21 and the electrodes 22 by screen printing, and then cured to form a laminate shown in FIG. 2 (c). Is done. As shown in FIG. 2C, application and curing of the resist material 24 are performed on both sides of the folding line 28.
- the resist material 24 has a pair of grooves 25 at symmetric positions about the bending line 28, and the electrode 22 is included in the groove 25 on the left side of the bending line 28.
- the medicine 26 is further applied on the electrode 22 in the groove 25.
- the pair of grooves 25 in the present example are linear and parallel to each other.
- an adhesive 23 which is a solvent-type acrylic adhesive is applied by screen printing.
- the substrate sheet 21 is folded at a distance equal to the fold line 28 along two straight lines 28 ′ parallel thereto, and the resist materials 24 are stuck together with the adhesive 23, as shown in FIG.
- the present invention has a spacer layer composed of a resist material 24 and an adhesive material 23 for bonding the resist materials 24 to each other between substrate sheets 21 each having a U-shaped cross section as shown in FIG.
- Sensor chip is obtained.
- the pair of grooves 25 combine to form a hollow reaction zone 27.
- This sensor chip has a structure symmetrical about the center plane 29, and therefore does not warp over time.
- this product is to apply one layer of resist material 24 on one substrate sheet 21, apply adhesive 23 to only one of them, and bend and bond the substrate sheet 21.
- a spacer layer can be formed at a stroke, and the conditions of the same material and the same thickness can be easily achieved, so that a desired chip can be produced very economically and with high accuracy. Is the way.
- one set of electrodes refers to a set of electrodes that can constitute one sensor chip, and includes at least two electrodes, a working electrode and a counter electrode.
- the sensor chip of the present invention can be manufactured by bending one substrate sheet and then cutting off the bent back portion of the substrate sheet.
- FIG. 3 shows another embodiment of the sensor chip of the present invention
- FIG. 3 (a) is a side view showing a state where the sheet substrate is bent.
- One substrate sheet 31 is bent, and is formed by a lower substrate sheet (substrate) 31a, an upper substrate sheet (cover layer) 31b, and a bent back portion 31c. It is shaped like a letter.
- Two electrodes (detection means) 32a and 32b are formed on the lower substrate sheet 31a, and the lower and upper spacers 33a and 33b and the spacer 33b are provided with an adhesive 34 on these electrodes 32a and 32b. Pasted through!
- a groove 35 is formed between the lower long !, spacer 33a and the short spacer 33b, and the groove 35 is coated on the drug 36 force electrodes 32a, 32b.
- Adhesive 37 is applied to the upper substrate sheet 31b at a position where the lower two spacers (spacer layers) 33a and 33b face each other, and the upper long spacer 38a and the short spacers are arranged on the upper substrate sheet 31b.
- Sa 38b is affixed!
- a groove 39 is formed between the upper two spacers (spacer layers) 38a and 38b, and a hollow reaction part 40 is formed by the upper and lower two grooves 39 and 35.
- Spacer 38a and short, spacer 38b and lower length, spacer 33a and short spacer 33b are bonded to each other via an adhesive 41.
- a method of manufacturing by bending one substrate sheet a method shown in FIG. 2 can be cited.
- a switch having a single-layer force is also provided.
- a plurality of spacers may be laminated, and in this case, it is preferable that the upper and lower spacers have the same number of laminated layers and have the same thickness.
- the back part 31c is cut and removed.
- the cutting blade 42 which can be moved in the stacking direction is moved between the short upper and lower spacers 33b and 38b and the vicinity of the back portion 31c.
- the cutting blade 40 is moved from the upper substrate sheet 3 lb to the lower substrate sheet 3 la.
- the back portion 31c of the substrate sheet 31 is cut off and removed, whereby the sensor chip 30 of the present invention is manufactured.
- the step of removing the residual stress in the spine portion can be eliminated by cutting out the spine portion, and a sensor chip can be easily manufactured.
- the sensor chip of the present invention can remove the residual stress by heating the back portion obtained by bending one substrate sheet. As shown in FIGS. 2 (a) to 2 (d) or 3 (a), after bending the substrate sheet 31, the back portion 31c is heated by a heating means such as a hot plate. This heating can remove (or alleviate) residual stress. By controlling the heating temperature and heating time (short time) to the spine, residual stress can be eliminated without adversely affecting the drug.
- FIG. 4 is a schematic sectional view showing an example of the sensor chip of the present invention.
- the sensor chip of this example has a spacer layer 106 interposed between a substrate 102 and a cover layer 103.
- the spacer layer 106 is formed by laminating two spacer members 104 and a pressure-sensitive adhesive material 105, and forms a hollow reaction part 109 on one end side.
- the spacer layer 106 is bonded to the substrate 102 and the cover layer 103 with an adhesive of a UV-curable resin 105 ′.
- the substrate 102 and the cover layer 103 are composed of one substrate sheet 101.
- the substrate sheet 101 is folded in a U-shape around a folding line 110 that divides the substrate sheet 101 into approximately two equal parts.
- One of the folding lines 110 is a substrate 102 and the other is a cover layer 103. Accordingly, as shown in FIG. 4, the substrate 102 and the cover layer 103 are connected to each other at the end closer to the hollow reaction part 109 and are integrated.
- An electrode 107 (detection means) is formed on the substrate sheet 101, and the electrode 107 is exposed in the hollow reaction section 109.
- the A drug 108 is applied on the electrode 107 in the hollow reaction section 109.
- FIG. 5 is a plan view showing a state in which a plurality of sets of electrodes 107, 107, (detection means) are formed on a substrate sheet 101.
- one set of electrodes 107 and 107 ' is composed of two electrodes and corresponds to a working electrode and a counter electrode, respectively.
- FIG. 6 is a side view showing a state where the electrodes 107 are formed on the substrate sheet 101.
- the electrode 107 is made of carbon ink, and is formed by screen printing on a substrate sheet 101 made of PET.
- the electrode 107 is formed only on the substrate 102 on one side of the bending line 110, and is not formed on the cover layer 103.
- FIG. 7A shows a laminate in which the electrodes 107 are formed on the substrate sheet 101 shown in FIGS. 5 and 6 by two lines 110 parallel to the fold line 110 and equidistant from the fold line 110. It is bent along 'and molded into a U-shape.
- the substrate sheet 101 is made of PET. This molding is performed by heating at a temperature of 160 to 250 ° C. Then, in order to eliminate the residual stress, the bent portion is heated and heat-treated at the same temperature. The heat treatment is performed by abutting the back portion bent in a U-shape on a hot plate and holding for 1 to 2 seconds.
- a spacer layer having a groove 109 as shown in FIG. 7B is formed.
- UV curing resin 105 ' is applied to both sides of this spacer layer, and inserted into a U-shaped molded body shown in FIG. 7 (a).
- FIG. 8 is an explanatory view showing one step of another manufacturing method of the present invention.
- two spacer materials 104 are laminated on one side of the fold line 110 by the adhesive materials 151 and 152. Lamination can also be performed by screen printing. In this case, the spacer material is applied directly on the substrate sheet and cured. The adhesive is used only for the top layer.
- the spacer material 104 has a groove
- the groove 109 'serving as the hollow reaction part 109 is formed by lamination. It is formed.
- the medicine 108 is applied on the electrode 107 exposed in the groove 109 '.
- a UV curing resin 105 ′ is applied on the uppermost spacer material 104.
- the heat treatment is performed by, after bending at normal temperature, holding the bent portion of the spine against a hot plate having a surface temperature of 200 ° C and holding the bent portion for 1 second.
- a hot plate When a hot plate is used, local heating is easy and the heating time can be short, so that both viewpoints of productivity and prevention of adverse effects due to heat are advantageous.
- the position where the chemical 108 is applied is at least 5 mm away from the portion where the hot plate abuts. If the distance is 5 mm or more, even if the heat treatment is performed under the above conditions, the temperature of the portion where the chemical 108 is applied will not be 60 ° C or more. Deterioration does not occur.
- the substrate sheet 101 and the spacer material 104 are bonded to each other.
- UV irradiation is performed to cure the UV curing resin 105 ′ on the spacer material 104, whereby the resin is adhered to form the sensor chip of the present invention.
- the adhesive 105, 151, 152 a rubber-based adhesive, an acrylic adhesive, a silicone-based adhesive, or the like can be used.
- the spacer material 104 PET or the like can be used.
- Urethane resin, epoxy resin, modified polyimide resin, acrylic resin and the like are used as the spacer material that can be screen printed.
- FIG. 9 is a plan view showing a state in which a plurality of sets of electrodes 202 and 202 ′ (detection means) are formed on a substrate 201.
- a pair of electrodes 202 and 202 ' is composed of two electrodes and corresponds to a working electrode and a counter electrode, respectively.
- FIG. 10 is a side view showing a state in which an electrode 202 is formed on a substrate 201.
- the electrodes 202 and 202 ′ are formed by screen printing on a substrate 201 made of PET resin by a carbon ink.
- the electrodes may be formed by a method other than screen printing, for example, by attaching a metal tape to a substrate.
- the dotted lines in Figs. 9 and 10 show a fold line 203 that divides the substrate 201 into approximately two equal parts, and two lines 203 'that are parallel to the fold line 203 and are equidistant therefrom. As shown in FIGS. 9 and 10, in this example, the electrodes 202 and 202 ′ are formed on only one of the bending lines 203.
- FIG. 11 is a plan view showing a state after the sheet layers 204 are stacked.
- the sheet layer 204 has two linear grooves 205 and 205 ′ equidistant from the folding line 203 and parallel to the folding line 203.
- the formation of the sheet layer 204 having such grooves 205, 205 is performed by applying a resin onto the substrate by screen printing.
- a resin to be screen-printed As the resin to be screen-printed, urethane resin, epoxy resin, modified polyimide resin, acrylic resin and the like are used.
- the sheet layer can be laminated by one application, which is preferable in terms of productivity. Further, the positions and shapes of the grooves 205 and 205 'can be easily changed only by changing the printing plate.
- the sheet layer 204 plays a role as a spacer when forming a sensor chip, and also has a role of masking the electrode surface by a predetermined area and keeping the electrode area constant, thereby reducing variations in sensor detection. It is generally called a resist layer.
- an adhesive or an adhesive having a function of bonding both surfaces when folded in two may be simultaneously applied by screen printing.
- a rubber-based adhesive an acrylic-based adhesive, a silicone-based adhesive, or the like can be used.
- an epoxy-based, butyl acetate-based, silicone-based adhesive, or the like can be used.
- the application of the medicine into the grooves 205, 205 is performed by an applicator such as a dispenser having two nozzles.
- the force of the two nozzles corresponds to the position of the grooves 205, 205. Since the grooves 205, 205 'are on two parallel straight lines, simply moving the two nozzles in parallel will result in the total length of the two grooves.
- a wide range of drug application can be easily performed in one step. That is, according to the present invention, by utilizing the fact that the two surfaces are on the same plane, the medicine can be applied to both the lower surface and the upper surface grooves in the same step using an application machine.
- the chemical may be applied to both grooves using one nozzle.However, if two nozzles for the lower surface and the upper surface are provided in one coating machine, the groove on one surface can be formed. It is economical because the coating can be applied to the grooves on both sides in exactly the same application time as when applying the drug. 2 nozzle drug By providing a separate supply up to the supply line, i.e. supplying a different agent to each, different agents in the grooves 205, 205 'can be applied.
- FIG. 12 and FIG. 13 are a plan view and a side view showing a state after the medicines 206 and 206 'are applied, respectively.
- the grooves are so formed as to include the drug in the grooves. 205 and 205 'may be formed.
- the method of applying the chemical after the formation in the grooves 205 and 205 ' is preferable in this respect because the positioning of the application and the control of the application amount are easier.
- the substrate 201 is folded in two around the folding line 203.
- the substrate 201 is bent along two lines 203 'which are parallel to and equidistant from the bending line 203, and are formed so as to have a U-shaped cross section.
- FIG. 14 is a side view showing the state after the two-folding. The bending can be performed at room temperature, but preferably, after bending, the bent portion is heat-treated to eliminate residual stress.
- the heat treatment temperature of the thermoplastic resin is desirably a temperature that is equal to or higher than the intermediate point between the resin softening temperature (glass transition temperature) and the melting point and equal to or lower than the melting point.
- the temperature is lower than the middle point between the fat softening temperature and the melting point, the bending state may not be sufficiently resolved in the bent portion and the bending state may change with time. On the other hand, if the melting point is exceeded, deformation of the resin becomes large, and it may not be possible to maintain a clean bent surface.
- PET resin has a resin softening temperature of about 70 ° C and a melting point of about 250 ° C.
- the heat treatment of the bent portion is preferably performed at 160 ° C. or more and 250 ° C. or less.
- Representative PET resins include Melinex Petron (trade name, manufactured by Teijin Dupont Film Co., Ltd.) and Lumirror (trade name, manufactured by Toray Industries, Inc.).
- the substrate 201 is bent at normal temperature, and then, while maintaining the bent state, the bent back portion is pressed against a hot plate having a surface temperature of 200 ° C.
- a preferred embodiment is exemplified by a method in which the heat treatment is performed while holding for 1 second.
- the position where the medicine 206 is applied is at least 5 mm away from the portion where the hot plate is abutted. If the distance is 5 mm or more, even if the heat treatment is performed under the above conditions, the temperature of the part coated with the drug 6 will not exceed 60 ° C. Does not occur.
- the folded sheet layer 204 is bonded with an adhesive 207 to form a spacer layer 208.
- an adhesive 207 a rubber-based adhesive, an acrylic-based adhesive, a silicone-based adhesive, or the like is used as described above.
- the grooves 205 and 205 ' are also combined to form a hollow reaction part 209, and the lower surface and upper surface thereof are coated with chemicals 206 and 206', respectively.
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Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/630,475 US20080248457A1 (en) | 2004-06-22 | 2005-06-21 | Sensor Chip and Manufacturing Method Thereof |
EP05753492A EP1760460A1 (en) | 2004-06-22 | 2005-06-21 | Sensor chip and manufacturing method thereof |
CA002571648A CA2571648A1 (en) | 2004-06-22 | 2005-06-21 | Sensor chip and manufacturing method thereof |
AU2005255305A AU2005255305A1 (en) | 2004-06-22 | 2005-06-21 | Sensor chip and manufacturing method thereof |
NO20065955A NO20065955L (no) | 2004-06-22 | 2006-12-21 | Sensorbrikke og fremgangsmate ved dens fremstilling |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004183954 | 2004-06-22 | ||
JP2004184245A JP4518846B2 (ja) | 2004-06-22 | 2004-06-22 | センサチップの製造方法及びセンサチップ |
JP2004-184245 | 2004-06-22 | ||
JP2004-184187 | 2004-06-22 | ||
JP2004-183954 | 2004-06-22 | ||
JP2004184187A JP2006010352A (ja) | 2004-06-22 | 2004-06-22 | センサチップ及びその製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005124329A1 true WO2005124329A1 (ja) | 2005-12-29 |
Family
ID=35509808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/011323 WO2005124329A1 (ja) | 2004-06-22 | 2005-06-21 | センサチップ及びその製造方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20080248457A1 (ja) |
EP (1) | EP1760460A1 (ja) |
KR (1) | KR20070027603A (ja) |
AU (1) | AU2005255305A1 (ja) |
CA (1) | CA2571648A1 (ja) |
NO (1) | NO20065955L (ja) |
WO (1) | WO2005124329A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006184270A (ja) * | 2004-12-03 | 2006-07-13 | Sumitomo Electric Ind Ltd | センサチップ及びその製造方法 |
WO2007001003A1 (ja) * | 2005-06-27 | 2007-01-04 | National Institute Of Advanced Industrial Science And Technology | バイオセンサー |
JP2007040963A (ja) * | 2005-06-27 | 2007-02-15 | National Institute Of Advanced Industrial & Technology | バイオセンサー |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8077447B2 (en) * | 2006-12-12 | 2011-12-13 | Panasonic Corporation | Electronic element package and method of manufacturing the same |
US8564559B2 (en) * | 2010-12-22 | 2013-10-22 | Universal Cement Corporation | Cover glass button for display of mobile device |
JP5587392B2 (ja) * | 2011-12-22 | 2014-09-10 | キヤノン・コンポーネンツ株式会社 | イメージセンサユニット、画像読取装置および画像形成装置 |
WO2016106320A2 (en) * | 2014-12-22 | 2016-06-30 | Siemens Healthcare Diagnostics Inc. | Foldable opposing sensor array |
US10746724B2 (en) * | 2015-07-30 | 2020-08-18 | Siemens Healthcare Diagnostics Inc. | Sensor array |
GB2543113B (en) * | 2015-10-09 | 2020-02-12 | Flexenable Ltd | Sensing device |
KR102153518B1 (ko) * | 2018-07-11 | 2020-09-08 | 안동대학교 산학협력단 | 혈당 바이오 센서 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH09159642A (ja) * | 1995-12-04 | 1997-06-20 | Dainippon Printing Co Ltd | バイオセンサ及びその製造方法 |
JPH09159644A (ja) * | 1995-12-11 | 1997-06-20 | Dainippon Printing Co Ltd | バイオセンサとその製造方法 |
JPH1151895A (ja) * | 1997-07-31 | 1999-02-26 | Nok Corp | バイオセンサ |
JP2000035413A (ja) * | 1998-07-16 | 2000-02-02 | Sapporo Imuno Diagnostic Laboratory:Kk | 脱水素酵素と補酵素を用いたバイオセンサ |
JP2000065777A (ja) * | 1998-08-21 | 2000-03-03 | Nok Corp | バイオセンサ |
JP2005233917A (ja) * | 2003-07-25 | 2005-09-02 | National Institute Of Advanced Industrial & Technology | バイオセンサおよびその製造方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001061357A2 (en) * | 2000-02-16 | 2001-08-23 | Wisconsin Alumni Research Foundation | Method and apparatus for detection of microscopic pathogens |
EP1167538A1 (de) * | 2000-06-30 | 2002-01-02 | Schibli Engineering GmbH | Biosensor und Herstellverfahren dafür |
-
2005
- 2005-06-21 WO PCT/JP2005/011323 patent/WO2005124329A1/ja active Application Filing
- 2005-06-21 KR KR1020067026904A patent/KR20070027603A/ko not_active Application Discontinuation
- 2005-06-21 US US11/630,475 patent/US20080248457A1/en not_active Abandoned
- 2005-06-21 EP EP05753492A patent/EP1760460A1/en not_active Withdrawn
- 2005-06-21 CA CA002571648A patent/CA2571648A1/en not_active Abandoned
- 2005-06-21 AU AU2005255305A patent/AU2005255305A1/en not_active Abandoned
-
2006
- 2006-12-21 NO NO20065955A patent/NO20065955L/no not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09159642A (ja) * | 1995-12-04 | 1997-06-20 | Dainippon Printing Co Ltd | バイオセンサ及びその製造方法 |
JPH09159644A (ja) * | 1995-12-11 | 1997-06-20 | Dainippon Printing Co Ltd | バイオセンサとその製造方法 |
JPH1151895A (ja) * | 1997-07-31 | 1999-02-26 | Nok Corp | バイオセンサ |
JP2000035413A (ja) * | 1998-07-16 | 2000-02-02 | Sapporo Imuno Diagnostic Laboratory:Kk | 脱水素酵素と補酵素を用いたバイオセンサ |
JP2000065777A (ja) * | 1998-08-21 | 2000-03-03 | Nok Corp | バイオセンサ |
JP2005233917A (ja) * | 2003-07-25 | 2005-09-02 | National Institute Of Advanced Industrial & Technology | バイオセンサおよびその製造方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006184270A (ja) * | 2004-12-03 | 2006-07-13 | Sumitomo Electric Ind Ltd | センサチップ及びその製造方法 |
WO2007001003A1 (ja) * | 2005-06-27 | 2007-01-04 | National Institute Of Advanced Industrial Science And Technology | バイオセンサー |
JP2007040963A (ja) * | 2005-06-27 | 2007-02-15 | National Institute Of Advanced Industrial & Technology | バイオセンサー |
Also Published As
Publication number | Publication date |
---|---|
CA2571648A1 (en) | 2005-12-29 |
NO20065955L (no) | 2007-03-22 |
KR20070027603A (ko) | 2007-03-09 |
US20080248457A1 (en) | 2008-10-09 |
AU2005255305A1 (en) | 2005-12-29 |
EP1760460A1 (en) | 2007-03-07 |
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