Channel device
AssigneeSCREEN Holdings Co., Ltd.
InventorNoriyuki NAKATANI
Life of this patent
Estimating the term…
Abstract
A technique capable of reducing variations in measurement results of electrical resistance due to the assembly accuracy of a channel device is provided. A first lid member closes an upper opening of a measurement chamber of an intermediate member. An upper working electrode is disposed on a surface of the first lid member. The upper working electrode includes a first upper working portion and a second upper working portion. A dimension from a second edge of the first upper working portion to a first edge of the second upper working portion is greater than the width of the measurement chamber. A distance between the first upper working portion and the second upper working portion as measured in a width direction is smaller than the width of the measurement chamber.
Claims14
A channel device for application to measurement of electrical resistance of cellular tissue, comprising:
- an intermediate member including a measurement chamber formed by a through hole passing therethrough in a first direction;
- a first lid member positioned on a surface of said intermediate member which is on a first side as seen in said first direction and closing an opening at a first edge of said measurement chamber as seen in said first direction;
- a second lid member positioned on a surface of said intermediate member which is on a second side as seen in said first direction and closing an opening at a second edge of said measurement chamber as seen in said first direction;
- a porous membrane positioned in said measurement chamber and partitioning said measurement chamber into a first chamber on the first side and a second chamber on the second side as seen in said first direction, said porous membrane being permeable to liquid;
- a first-side working electrode and a first-side reference electrode both positioned on a surface of said first lid member which is on the second side as seen in said first direction and overlapping said measurement chamber as seen in said first direction;
- and
- a second-side working electrode and a second-side reference electrode both positioned on a surface of said second lid member which is on the first side as seen in said first direction and overlapping said measurement chamber as seen in said first direction,
- wherein said first-side working electrode includes
- a first first-side working portion, and
- a second first-side working portion spaced toward a first side in a second direction intersecting said first direction apart from said first first-side working portion,
- wherein a dimension from an edge of said first first-side working portion which is on a second side as seen in said second direction to an edge of said second first-side working portion which is on the first side as seen in said second direction is greater than the width of said measurement chamber as measured in said second direction, and
- wherein a distance between said first first-side working portion and said second first-side working portion as measured in said second direction is smaller than the width of said measurement chamber.
Dependencies are inferred from the claim text.