Abstract: The present invention provides a microchip which is made by bonding a first substrate having a groove provided at the substrate surface and a second substrate together, and has a fluid circuit therein, the fluid circuit having a separation portion for separating a first component, and a groove which constitutes the separation portion including an approximately V-shaped region surrounded by prescribed flow channel walls. At a top of the separation portion, a flow rate limiting portion limiting a flow rate of a fluid is preferably provided.

Abstract: An objective is to provide a microchip inspection system in which an amount of driving liquid filled in a flow path between a micropump and a microchip is kept constant. Also disclosed is a microchip inspection system possessing a micropump by which driving liquid is injected into a microchip from a flow path; a driving liquid sensing device by which a sensing signal is output by sensing presence or absence of the driving liquid at a predetermined position of the flow path; and a pump driving control section by which the driving liquid is moved to a position based on the predetermined position as a reference position by driving the micropump in response to the sensing signal obtained from the driving liquid sensing device.

Abstract: There is described a microchip inspection system, which makes it possible not only to correct the influence of the viscosity change of the liquid, but also to accurately conduct the liquid conveyance controlling operation. The microchip inspection system includes: a micro pump to inject a driving liquid from a liquid flow path into a microchip; a liquid temperature adjusting section to adjust a liquid temperature of the driving liquid; a driving liquid detecting section to detect presence or absence of the driving liquid at two predetermined positions located in the liquid flow path, so as to output detection signals; a fluid velocity calculating section to calculate a fluid velocity based on the detection signals outputted by the driving liquid detecting section; and a liquid temperature controlling section to control the liquid temperature adjusting section, based on the fluid velocity calculated by the fluid velocity calculating section.

Abstract: A micro total analysis chip including: a main flow chip for feeding a liquid; and a divided flow path for dividing and feeding the liquid at a predetermined division ratio, each divided path of the plurality of divided paths having a high flow path narrower than a preceding part and a subsequent part of the each divided path, wherein a flow portion of a first divided path in the divided paths satisfies and expression of: R×Q>?×L/S, where, Q is a flow rate of the first divided path, S is a sectional area and L is a sectional circumferential length of a flow path of other divided path of the plurality of divided paths, and ? is a surface tension liquid.

Abstract: A micro total analysis chip including: a main flow path for feeding a liquid; and a divided flow path branched into a plurality of divided paths for dividing and feeding the liquid fed from the main flow path at a predetermined division ratio, wherein a ratio of flow path resistance between each of the divided paths is approximately equal to a reciprocal of the predetermined ratio with which the liquid is divided and fed to the each of the divided paths.

Abstract: There is described a micro total analysis chip, which makes it possible not only to stabilize the liquid transportation amount and the liquid conveying velocity of the sample liquid, but also to improve the accuracy of analysis. The chip includes: a first connecting section to connect with a first liquid conveying device; a sample liquid injecting section coupled to a downstream side of the first connecting section; a first sample liquid conveying path coupled to a downstream side of the sample injecting section; a second connecting section to connect with a second liquid conveying device; a sample liquid reservoir coupled to the second connecting section and a downstream side of the first sample liquid conveying path, to accommodate the sample liquid; and a second sample liquid conveying path coupled to a downstream side of the sample liquid reservoir, so that the sample liquid is conveyed downstream.

Abstract: An objective is to provide a microchip exhibiting no scattering of stored reagent together with reduced size, which is capable of rapidly mixing the reagent when used. Also disclosed is a microchip possessing a reaction section in which reaction with a reagent or a specimen supplied from a flow path is conducted via heat, wherein the reaction section possesses a storage section to store the reagent in advance, and the reagent previously stored in the storage section is sealed with a material which generates phase transition from a solid phase to a liquid phase between a storage temperature and a reaction temperature.

Abstract: A micro reactor for inspecting a biological material, comprising: a first substrate on which a minute flow path is formed; a second substrate laminated on the first substrate so as to cover the minute flow path; a detection section provided on the minute flow path formed between the first and second substrates so as to inspect a liquid mixture of a sample and a reagent; (4) an opening section formed at a region on the second substrate corresponding to the detection section so as to irradiate inspection light to the liquid mixture arriving the detection; and (5) a transparent member to cover the opening section.