The present invention is directed to an improved flow cell of the type that may be utilized in the synthesis of arrays of {HEAD ~ DNA probe sequences}, polypeptides and the like, and is particularly adapted to be used with image formers for projecting an array of patterned light onto a substrate held by {TAIL ~ the flow cell} 
The present invention is directed to an improved flow cell of the type that may be utilized in the synthesis of arrays of { HEAD ~ DNA probe sequences } , polypeptides and the like , and is particularly adapted to be used with image formers for projecting an array of patterned light onto a substrate held by { TAIL ~ the flow cell }
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