Hermetically sealed implantable ophthalmic devices and methods of making same
First Claim
1. A method of making an implantable ophthalmic device, the method comprising:
- (a) placing an electronic component in electrical communication with a hermetically sealed feedthrough that provides a conductive path from a first side of a first substrate to a second side of the first substrate;
(b) bonding a second substrate to the first side of the first substrate to at least partially define a hermetically sealed cavity containing the electronic component;
(c) making an electro-active element by;
(i) filling a cavity with liquid crystal material via a glass tube; and
(ii) closing the glass tube to seal the liquid crystal material in the cavity; and
(d) placing the electro-active element in electrical communication with the electronic component via the hermetically sealed feedthrough.
2 Assignments
0 Petitions
Accused Products
Abstract
Many modern implantable ophthalmic devices include electronic components, such as electro-active cells, that can leak harmful substances into the eye and/or surrounding tissue. In the implantable ophthalmic devices disclosed herein, electronic components are hermetically sealed within cavities formed by bonding together two or more glass wafers. Bonding the glass wafers together with laser fusion bonding, pressure bonding, or anodic bonding creates a seal that leaks at a rate of less than about 5×10−12 Pa m3s−1 when subjected to a helium leak test. Hermetically sealed feedthroughs formed of conductive material running through channels in the wafers provide electrical connections to components inside the sealed cavities. In some cases, the conductive material has a coefficient of thermal expansion (CTE) that is roughly equal to (e.g., within 10% of) the CTE of the glass wafers to minimize leakage due to thermally induced expansion and contraction of the conductive material and the glass wafer.
40 Citations
20 Claims
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1. A method of making an implantable ophthalmic device, the method comprising:
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(a) placing an electronic component in electrical communication with a hermetically sealed feedthrough that provides a conductive path from a first side of a first substrate to a second side of the first substrate; (b) bonding a second substrate to the first side of the first substrate to at least partially define a hermetically sealed cavity containing the electronic component; (c) making an electro-active element by; (i) filling a cavity with liquid crystal material via a glass tube; and (ii) closing the glass tube to seal the liquid crystal material in the cavity; and (d) placing the electro-active element in electrical communication with the electronic component via the hermetically sealed feedthrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of making an implantable ophthalmic device, the method comprising:
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(a) placing an electronic component in electrical communication with a hermetically sealed feedthrough that provides a conductive path from a first side of a first substrate to a second side of the first substrate; (b) bonding a second substrate to the first side of the first substrate to at least partially define a hermetically sealed cavity containing the electronic component; (c) making an electro-active element by; (i) filling a cavity with liquid crystal material via channels having modified interior surfaces; and (ii) collapsing the channels to seal the liquid crystal material in the cavity; and (d) placing the electro-active element in electrical communication with the electronic component via the hermetically sealed feedthrough. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification