Implant encapsulation
First Claim
Patent Images
1. An implant unit, comprising:
- a substrate;
an implantable circuit arranged on the substrate; and
an encapsulation structure disposed over at least a portion of the substrate and at least a portion of the implantable circuit, the encapsulation structure including;
a first polymer layer having a first density;
a second polymer layer disposed over the first polymer layer and having a density which is less than the first density; and
at least one pair of modulation electrodes connected to the implantable circuit, wherein the first polymer layer includes a first window of exposure over one or more of the modulation electrodes, the first window of exposure having a first area; and
wherein the second polymer layer includes a second window of exposure over one or more of the modulation electrodes and at least partially extending over the first window of exposure, the second window of exposure having a second area that is larger than the first area of the first window of exposure.
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Abstract
An implant unit may include a substrate and an implantable circuit arranged on the substrate. An encapsulation structure may be disposed over at least a portion of the substrate and at least a portion of the implantable circuit, the encapsulation structure including a parylene layer and a silicon layer disposed over the parylene layer.
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Citations
17 Claims
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1. An implant unit, comprising:
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a substrate; an implantable circuit arranged on the substrate; and an encapsulation structure disposed over at least a portion of the substrate and at least a portion of the implantable circuit, the encapsulation structure including; a first polymer layer having a first density; a second polymer layer disposed over the first polymer layer and having a density which is less than the first density; and at least one pair of modulation electrodes connected to the implantable circuit, wherein the first polymer layer includes a first window of exposure over one or more of the modulation electrodes, the first window of exposure having a first area; and wherein the second polymer layer includes a second window of exposure over one or more of the modulation electrodes and at least partially extending over the first window of exposure, the second window of exposure having a second area that is larger than the first area of the first window of exposure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification