| 摘要 |
1422239 Solid-state cells WILSON GREATBATCH Ltd 28 Feb 1973 [1 March 1972] 9739/73 Heading H1B A cell intended for implantation in the human body comprises. Figs. 2, 3, a housing 20 of ceramic or fibreglass having an aperture 24 through which is sealed the insulating sleeve 28 of a conductor wire 26 secured to a screen 27 preferably of nickel. The anode 12a consists of lithium optionally doped with magnesium and/or calcium and is in the form of a thin disc 30 and a thicker disc 31 which are pressed on to opposite sides of the screen 27. The layer 16a comprises a complex of iodine and an ionexchange or non-ion-exchange resin. Example of ion-exchange resin is polyvinylpyridine and examples of non-ion-exchange resins are pyrene and polyvinylpyrene. The organic iodine complex layer 16a is poured in tar form into the cavity 21 after insertion of the anode 12a to a level slightly above the ridge 23. A barrier layer 17a comprises a fibreglass film coated with ion-exchange resins or salts, i.e. rubidium iodide, cesium iodide and/or tetramethyl ammonium iodide. An iodine reservoir layer 18a comprises a mixture of iodine and carbon. Layer 18a maintains the necessary iodine level in the layer 16a during the cell discharge. The cathode plate 13a is of a metal selected from stainless steel, stainless steel and nickel compound, nickel, titanium, gold, molybdenum, or gold and molybdenum compound. The plate 13a is retained by a contact plate 33 secured by adhesive 32. The housing 20 may be encapsulated in a rubberized implantation unit such as a pacemaker or in a stainless steel housing. In a double-cell embodiment described with reference to Figs. 6-10 (not shown) a common anode is centrally disposed and has arranged on either side a cathode structure. To improve contact between the several cell layers the housing end plates have leaf springs on their inner sides and the outwardly-facing surfaces of the reservoir layers are contacted by stainless steel fibre layers. |
