Reaction site array with a black matrix to decrease cross-contamination between reaction regions

A reaction site array for receiving a liquid medium containing a reactant comprising a substrate and a black matrix arranged on a surface of the substrate, wherein (i) a difference in wettability to a liquid medium between the black matrix and a region of the substrate not provided with the black matrix is sufficiently large to decrease cross-contamination;

• (ii) said region is a reaction site;
• (iii) the liquid containing the reactant introduced on a surface of said region reacts on the surface of said region;
• (iv) the black matrix is composed of a metal;
• and (v) the region is more wettable by the liquid medium than the black matrix.

A reaction site array for receiving a liquid medium containing a reactant comprising a substrate and a black matrix arranged on a surface of the substrate, wherein (i) a difference in wettability to a liquid containing a reactant between the black matrix and a region of the substrate not provided with the black matrix is sufficiently large to decrease cross-contamination;

• (ii) said region is a reaction site;
• (iii) said region is adapted to receive a DNA probe or an RNA probe;
• (iv) the liquid containing the reactant introduced on a surface of said region reacts on the surface of said region;
• (v) the black matrix is composed of a resin, which is obtained by using a photosensitive resin, and one of a black pigment or carbon black;
• and (vi) the region is more wettable by the liquid medium than the black matrix.

A reaction site array for receiving a liquid medium containing a reactant comprising a substrate and a black matrix arranged on a surface of the substrate, wherein (i) a difference in wettability to a liquid containing a reactant between the black matrix and a region of the substrate not provided with the black matrix is sufficiently large to decrease cross-contamination;

• (ii) said region is a reaction site;
• (iii) said region is adapted to receive a DNA probe or an RNA probe;
• (iv) the liquid containing the reactant introduced on a surface of said region reacts on the surface of said region;
• (v) the black matrix is composed of a metal;
• and (vi) the region is more wettable by the liquid medium than the black matrix.