摘要:
Methods and devices for fitting a visual prosthesis are described. In one of the methods, threshold levels and maximum levels for the electrodes of the prosthesis are determined and a map of brightness to electrode stimulation levels is later formed. A fitting system for a visual prosthesis is also discussed, together with a computer-operated system having a graphical user interface showing visual prosthesis diagnostic screens and visual prosthesis configuration screens.
摘要:
The present invention is an improved hermetic package for implantation in the human body. The implantable device comprises an electrically non-conductive substrate; a plurality of electrically conductive vias through said electrically non-conductive substrate; a flip-chip circuit attached to said electrically non-conductive substrate using conductive bumps and electrically connected to a first subset of said plurality of electrically conductive vias, wherein said flip-chip circuit contains one or more stacks or a folded stack; a wire bonded circuit attached to said electrically non-conductive substrate and electrically connected to a second subset of said electrically conductive vias; and a cover bonded to said electrically non-conductive substrate, said cover, said electrically non-conductive substrate and said electrically conductive vias forming a hermetic package.
摘要:
The present invention provides a flexible circuit electrode array adapted for neural stimulation, comprising: a polymer base layer; metal traces deposited on said polymer base layer, including electrodes suitable to stimulate neural tissue; a polymer top layer deposited on said polymer base layer and said metal traces at least one tack opening; wherein said polymer base layer, said metal traces and said polymer top layer are thermoformed in a three dimensional shape. The present invention provides further a method of making a flexible circuit electrode array comprising depositing a polymer base layer; depositing metal on said polymer base layer; patterning said metal to form metal traces; depositing a polymer top layer on said polymer base layer and said metal traces; preparing at least one tack opening; and heating said flexible circuit electrode array in a mold to form a three dimensional shape in said flexible circuit electrode array.
摘要:
Polymer materials are useful as electrode array bodies for neural stimulation. They are particularly useful for retinal stimulation to create artificial vision, cochlear stimulation to create artificial hearing, or cortical stimulation many purposes. The pressure applied against the retina, or other neural tissue, by an electrode array is critical. Too little pressure causes increased electrical resistance, along with electric field dispersion. Too much pressure may block blood flow. Common flexible circuit fabrication techniques generally require that a flexible circuit electrode array be made flat. Since neural tissue is almost never flat, a flat array will necessarily apply uneven pressure. Further, the edges of a flexible circuit polymer array may be sharp and cut the delicate neural tissue. By applying the right amount of heat to a completed array, a curve can be induced. With a thermoplastic polymer it may be further advantageous to repeatedly heat the flexible circuit in multiple molds, each with a decreasing radius. Further, it is advantageous to add material along the edges. It is further advantageous to provide a fold or twist in the flexible circuit array. Additional material may be added inside and outside the fold to promote a good seal with tissue.
摘要:
The present invention is an improved hermetic package for implantation in the human body. The implantable device of the present invention includes an eclectically non-conductive bass including electrically conductive vias through the substrate. A circuit is flip-chip bonded to a subset of the vias. A second circuit is wire bonded to another subset of the vias. Finally, a cover is bonded to the substrate such that the cover, substrate and vias form a hermetic package.
摘要:
Methods and devices for verifying that proper visual stimulation is applied to the visual prostheses are described. In one of the methods, a retinal stimulation system implanted on a subject is simulated externally. An external testing device is also discussed.
摘要:
A method and apparatus for improving visual acuity when providing a visual image from a “high” resolution input device to a “low” resolution output device. The described invention is of particular use when the output device is an array of electrodes as part of a retinal prosthesis used to restore vision to a visually-impaired patient. In that various limitations may, within the foreseeable future, limit the density of such an electrode array (and thus the resolution of the output image), the present invention teaches techniques to assign processed pixel subsets of a higher resolution image to a single electrode. By varying the pixel subsets, e.g., by jittering, and/or altering the processing criteria, the perceived visual acuity may be further improved. Alternatively and additionally, such processing may be further extended to drive neighboring electrodes in combination to thus stimulate virtual electrode sites and thus further enhance visual acuity.
摘要:
The present invention provides a flexible electrode array, comprising a silicone containing body, at least one metal trace layer and at least one electrode pad on the surface. The present invention further provides a process of manufacturing a flexible electrode array, comprising: a) irradiating a surface area of a molded silicone containing layer yielding traces with a light beam emitted by a pulsed UV laser source, b) immersing said irradiated molded silicone layer for inducing the deposit of metal ions to form metal traces, c) applying a silicone containing layer on said silicone containing layer and said metal traces, d) irradiating the surface for drilling holes into the surface of the molded silicone containing layer, and e) immersing said irradiated molded silicone layer for inducing the deposit of metal ions to form metal electrode pads.
摘要:
This invention is a retinal electrode array assembly and methods of using the same that facilitate surgical implant procedures by providing the operating surgeon with visual references and grasping means and with innovations that reduce actual and potential damage to the retina and the surrounding tissue.
摘要:
The present invention provides a process for embedding at least one layer of at least one metal trace in a silicone-containing polymer, comprising: a) applying a polymer layer on a substrate; b) thermally treating the polymer; c) irradiating at least one surface area of the polymer with a light beam emitted by an excimer laser; d) immersing the irradiated polymer in at least one autocatalytic bath containing ions of at least one metal, and metallizing the polymer; e) thermally treating the metallized polymer; f) applying a polymer layer covering the thermally treated metallized polymer; and g) thermally treating the metallized covered polymer. The present invention further provides a polymer layer comprising silicone containing oxide particles of SiO2, TiO2, Sb2O3, SnO2, Al2O3, ZnO, Fe2O3, Fe3O4, talc, hydroxyapatite or mixtures thereof and at least one metal trace embedded in said polymer layer. The present invention further provides a flexible electrode array comprising silicone containing oxide particles of SiO2, TiO2, Sb2O3, SnO2, A1203, ZnO, Fe2O3, Fe3O4, talc, hydroxyapatite or mixtures thereof and at least one metal trace embedded in said polymer layer.
摘要翻译:本发明提供了一种在含硅酮聚合物中嵌入至少一层至少一种金属痕迹的方法,包括:a)在基底上施加聚合物层; b)热处理聚合物; c)用由准分子激光器发射的光束照射所述聚合物的至少一个表面积; d)将经辐射的聚合物浸入至少一种含有至少一种金属的离子的自催化浴中,并对该聚合物进行金属化; e)热处理金属化聚合物; f)涂覆覆盖热处理的金属化聚合物的聚合物层; 和g)热处理金属化被覆聚合物。 本发明还提供一种聚合物层,其包含含硅氧烷的SiO 2,TiO 2,Sb 2 O 3, N 2,N 2 O 3,N 2,N 2 O 3, Fe 3 O 3,滑石,羟基磷灰石或其混合物,以及嵌入所述聚合物层中的至少一种金属迹线。 本发明还提供了一种柔性电极阵列,其包括含硅氧烷的SiO 2,TiO 2,Sb 2 O 3, / SUB>,SnO 2,Al 2 O 3,ZnO,Fe 2 O 3, Fe 3 O 3,滑石,羟基磷灰石或其混合物,以及嵌入所述聚合物层中的至少一种金属迹线。