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Porous microfabricated polymer membrane structures

  • US 5,807,406 A
  • Filed: 10/07/1994
  • Issued: 09/15/1998
  • Est. Priority Date: 10/07/1994
  • Status: Expired due to Term
First Claim
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1. A material comprising a porous structure forming a chamber to hold living cells while implanted in host tissue, the structure including multiple layers of microfabricated polyimide wherein one layer has a first microfabricated geometric pattern comprising holes having a cross section of greater than about 20 μ

  • m and intermediate strands having a dimension less than about 5 μ

    m, and at least one other layer having microfabricated geometric patterns comprising holes having a cross dimension equal to or less than about 20 μ

    m and intermediate strands having a dimension less than about 5 μ

    m.

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