# US 7,410,614 B2 · Optical waveguide type iontophoresis sensor chip and method for packaging sensor chip

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- Number: US 7,410,614 B2
- Document ID: US7410614B2
- Status: Granted
- Kind: B2
- Application number: 10/899,264
- Filed: 2004-07-26
- Published: 2006-03-23
- Granted: 2008-08-12
- Earliest claimed: 2004-07-26
- Assignees: Kabushiki Kaisha Toshiba
- Inventors: Kenichi Uchiyama; Ikuo Uematsu; Kayoko Oomiya; Ichiro Tono; Hideo Eto; Isao Kishimoto; Naotada Okada; Masami Hirata
- Web page: https://patentgrep.com/patent/US7410614B2

## CPC

- A61B 5/14514: {using means for aiding extraction of interstitial fluid, e.g. microneedles or suction}
- A61B 5/14532: {for measuring glucose, e.g. by tissue impedance measurement}
- A61B 5/1455: using optical sensors, e.g. spectral photometrical oximeters
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

An optical waveguide type iontophoresis sensor chip has a substrate having a first hinged plate and a second hinged plate, an optical waveguide plate connected to the first hinged plate and positioned over a first opening delineated in the first hinged plate, and a gel layer fixed on the second hinged plate and covering a second opening delineated in the second hinged plate and configured to contact with the optical waveguide plate through the first opening in case that the substrate is folded.

## Claims

### Claim 1

An optical waveguide type iontophoresis sensor chip comprising:
a substrate having a first hinged plate and a second hinged plate;
an optical waveguide plate connected to the first hinged plate and positioned over a first opening delineated in the first hinged plate; and
a gel layer fixed on the second hinged plate and covering a second opening delineated in the second hinged plate and configured to contact with the optical waveguide plate through the first opening in case that the substrate is folded.

### Claim 2 (depends on 1)

The optical waveguide type iontophoresis sensor chip of claim 1, further comprising a pair of protection plates having an interval for light transmission and disposed on an opposite surface of the optical waveguide plate to a contact surface on the substrate.

### Claim 3 (depends on 2)

The optical waveguide type iontophoresis sensor chip of claim 2, wherein the pair of the protection plate contains a desiccating agent.

### Claim 4 (depends on 1)

The optical waveguide type iontophoresis sensor chip of claim 1, further comprising a hinge groove along a boundary between the first hinged plate and the second hinged plate.

### Claim 5 (depends on 1)

The optical waveguide type iontophoresis sensor chip of claim 1, further comprising;
a first sealed cell that is formed by pasting a packaging sheet on a peripheral region of the first hinged plate and seals in the optical waveguide plate;
a gel holding portion formed by the packaging sheet and fixing the both ends of the gel layer on the substrate; and
a second sealed cell that is formed by pasting the packaging sheet on a peripheral region of the second hinged plate and seals in the gel layer.

### Claim 6 (depends on 5)

The optical waveguide type iontophoresis sensor chip of claim 5, wherein the gel holding portion is left on the substrate in case that the packaging sheet is opened.