Bead transporter chucks using repulsive field guidance and metho

Details Bead transporter chucks using repulsive field guidance and metho Bead transporter chucks using repulsive field guidance and metho

1998-02-19

2000-08-01

Valentine, Donald R.

Coating processes

Medical or dental purpose product; parts; subcombinations;...

Particulate or unit-dosage-article base

279128, 427458, 427475, 427485, 204297M, A61J 300, B05D 122, B05D 104, B23B 522, C25D 1704

Patent

active

060963689

ABSTRACT:
Bead transporter chucks for selective pick up and discharging of polymer beads for chemical synthesis or analysis, whereby repulsive field conductors are arranged around bead electrodes used for selectively attracting and retaining beads. Problems of bead control are addressed by adding repulsive fields to help guide and direct beads to desired or designated bead collection zones. The repulsive electrodes create non-uniform electric fields that control, focus, and deflect charged beads in the vicinity of the bead collection zone, helping prevent multiple bead retention at intended bead collection zones. For better bead control, and allowing manipulation of beads with higher charge/mass ratios, dielectric material may be positioned around the bead electrode and between the bead electrode and the repulsive field conductor. Multiple bead electrodes may be provided to form two or more bead collection zones, and these may selectively addressed and controlled (e.g, x-y addressing) for individual and selective control of the bead collection zones. Methods and applied voltages are given for using the bead transporter chuck to transport and dispense beads.

REFERENCES:
patent: 5653859 (1997-08-01), Parton et al.
patent: 5728532 (1998-03-01), Ackley
patent: 5788814 (1998-08-01), Sun et al.
patent: 5846595 (1998-12-01), Sun et al.
patent: 5858099 (1999-01-01), Sun et al.

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