Agilent Technologies of Palo Alto, Calif., has received US Patent No. 6,884,580, "Fabricating biopolymer arrays." The patent covers a method and apparatus for fabricating an array of biopolymers on a substrate using a biopolymer or biomonomer fluid, and using a dispensing head. The head of the apparatus has a reservoir chamber and at least one jet which can dispense droplets onto a substrate. The jet includes a capillary delivery chamber with an orifice that is attached to the reservoir chamber.