• US 8,758,542 B2
  • Filed: 11/09/2009
  • Issued: 06/24/2014
  • Est. Priority Date: 03/25/2009
  • Status: Active Grant
First Claim
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1. A method for preparing a filter device, comprising:

  • (i) providing a solvable mold comprising an array of pillars of substantially the same size;

    (ii) depositing a curable resin layer on the solvable mold, curing the resin to form a membrane filter comprising an array of pores of substantially the same size in contact with the solvable mold;

    (iii) contacting at least a portion of a first surface of the membrane filter away from the mold to a first support; and

    (iv) dissolving away the solvable mold leaving the membrane filter in contact with the support;

    wherein the curable resin of step (ii) comprises a uv curable resin or a temperature curable resin and step (ii) comprises;

    (a) depositing the uv curable resin or temperature curable resin onto the solvable mold;

    (b) positioning a plate with a substantially flat surface over the uv curable resin or temperature curable resin and exerting pressure on the resin;

    (c) exposing the resin to UV light or a temperature suitable to cure the resin as appropriate; and

    (d) removing the plate and any excess resin to obtain a membrane filter with a substantially flat exposed first surface.

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