Patent ID: 6860978
Filing Date: 2005-03-01
Classification: C12Q

Abstract:
1. A biosensor comprising: a first conductive lead part comprising a metal and disposed on an insulating substrate; a second conductive lead part comprising a metal and disposed on the insulating substrate; a working electrode comprising carbon and disposed at a first end of said first conductive lead part and on the insulating substrate so that a portion of said working electrode overlaps said first conductive lead part; a counter electrode comprising carbon and disposed at a first end of said second conductive lead part and on the insulating substrate so that a portion of said counter electrode overlaps said second conductive lead part; a reaction layer including at least an enzyme and an electron acceptor, wherein said reaction layer is formed on said working electrode and said counter electrode so as to bridge said working electrode and said counter electrode, wherein said reaction layer reacts with a measurement target substance in a specimen liquid, wherein said reaction layer which contacts said working electrode and said counter electrode is not provided above said first and second conductive lead parts, wherein said reaction layer is covered with a cover having a specimen supply groove that has an opening at a first end thereof, wherein the specimen supply groove is operable to introduce the specimen liquid applied around the opening to said reaction layer, and wherein said first and second conductive lead parts are not located beneath the specimen supply groove.