发明授权
- 专利标题: Surface modification of ePTFE and implants using the same
- 专利标题(中): ePTFE和使用其的植入物的表面改性
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申请号: US11227378申请日: 2005-09-15
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公开(公告)号: US07597924B2公开(公告)日: 2009-10-06
- 发明人: Alexey Kondyurin , Manfred Franz Maitz
- 申请人: Alexey Kondyurin , Manfred Franz Maitz
- 申请人地址: US MN Maple Grove
- 专利权人: Boston Scientific Scimed, Inc.
- 当前专利权人: Boston Scientific Scimed, Inc.
- 当前专利权人地址: US MN Maple Grove
- 代理机构: Vidas, Arrett & Steinkraus
- 主分类号: B05D3/06
- IPC分类号: B05D3/06 ; A61L33/00 ; H05H1/00 ; A61L2/00
摘要:
A method for modifying an ePTFE surface by plasma immersion ion implantation includes the steps of providing an ePTFE material in a chamber suitable for plasma treatment; providing a continuous low energy plasma discharge onto the sample; and applying negative high voltage pulses of short duration to form a high energy ion flux from the plasma discharge to generate ions which form free radials on the surface of the ePTFE material without changing the molecular and/or physical structure below the surface to define a modified ePTFE surface. The step of applying the high voltage pulses modifies the surface of the ePTFE without destroying the node and fibril structure of the ePTFE, even when the step of applying the high voltage pulses etches and/or carburizes the surface of the ePTFE. The modified surface may have a depth of about 30 nm to about 500 nm. The ions are dosed onto the ePTFE sample at concentrations or doses from about 1013 ions/cm2 to about 1016 ions/cm2.