Ac waveforms biasing for bead manipulating chucks

B - Operations – Transporting – 01 – J

Patent

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Details

B01J 19/08 (2006.01) B01J 19/00 (2006.01) B05D 1/04 (2006.01) H02N 13/00 (2006.01) G01N 35/00 (2006.01)

Patent

CA 2333130

AC waveforms biasing of bead transporter chucks and their accumulated charge sensing circuits tailored for low resistivity substrates and beads where if traditional DC quasi-static biasing potentials were used, the bead attraction potentials of the chuck would undergo rapid RC decay and cause the bead transporter chuck to stop working. Methods for selecting AC waveforms are given, including those that maximize the time average of the bead attraction potential at the bead collection zone of the bead contact surface.

La présente invention concerne la polarisation des mandrins de transport de perles par des signaux en courant alternatif. L'invention concerne également des circuits de détection de charge cumulée conçus pour des substrats et des perles à faible résistivité. Ces circuits permettent d'éviter que les potentiels d'attraction des perles par le mandrin ne subissent une chute rapide de la part du relais RC susceptible de provoquer l'arrêt du fonctionnement du mandrin de transport, comme cela peut se produire lorsqu'on utilise les potentiels de polarisation quasi-statiques conventionnels des courants continus. L'invention concerne également des procédés de sélection des signaux en courant alternatif, y-compris des procédés permettant de maximiser la moyenne de temps du potentiel d'attraction des perles au niveau de la zone de recueil des perles de la surface de contact des perles.

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