| 摘要 |
A biochip capable of detecting the positions of sites with ease is provided. A site area is formed on a substrate of the biochip. A plurality of sites are disposed in a matrix fashion on the site area. Four markers are provided around the site area. Respective sites on the site area are formed by dripping spotted liquid such as a DNA solution and so forth. Further, respective markers are formed by dripping opaque liquid by use of a device used for forming respective sites. Since the respective sites and the markers are continuously formed by spotted liquid by use of the same device, a mutual positional relationship therebetween is defined with excellent accuracy. Once the positional relationship can be defined, a fabricating method is not limited. Opaque liquid is achieved by dyes, pigment or by bonding gold colloid to the DNA, or by bonding a coloring matter such as dyes or pigment to the DNA via biotin. The substrate is formed by use of, e.g. glass. The substrate may be transparent or opaque by providing a metal layer on the surface thereof or reflective. The markers are formed so as to be recognized in their positions relative to the substrate by a reflected light or transmitted light.
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