The initial publication on microarray production process dates back to 1995, when 48 cDNAs of a plant were printed on glass slide typically used for light microscopy, modern microarrays on the other hand include now thousands of probes and different carriers with coatings.
A DNA microarray is a tool used to determine whether the DNA from a particular individual contains a mutation in genes.
The labeled cDNAs from both the samples are placed in the DNA microarray so that each cDNA gets hybridized to its complementary strand; they are also thoroughly washed to remove unbounded sequences.