摘要:
A high voltage capacitor anode for an implantable medical device is fabricated by sintering, anodizing and heat treating a pressed tantalum powder slug. The sintering may be performed at a temperature between approximately 1500° C. and approximately 1600° C. for a time between approximately 3 minutes and approximately 35 minutes; subsequent anodization may be performed by immersing the slug in an electrolyte at a temperature between approximately 15° C. and approximately 30° C. and then applying a voltage across the slug, the voltage being between approximately 175 Volts and approximately 375 Volts; subsequent heat treating may be performed at a temperature between approximately 400° C. and approximately 460° C. for a time between approximately 50 minutes and approximately 65 minutes. Following heat treating, the anode is reformed by a second anodization.
摘要:
A capacitor for an implantable medical device is presented. The capacitor includes an anode, a cathode, a separator therebetween, and an electrolyte over the anode, cathode, and separator. The electrolyte includes ingredients comprising acetic acid, ammonium acetate, phosphoric acid, and tetaethylene glycol dimethyl ether. The capacitor has an operating voltage ninety percent or greater of its formation voltage.
摘要:
A high voltage capacitor anode for an implantable medical device is fabricated by sintering, anodizing and heat treating a pressed tantalum powder slug. The sintering may be performed at a temperature between approximately 1500° C. and approximately 1600° C. for a time between approximately 3 minutes and approximately 35 minutes; subsequent anodization may be performed by immersing the slug in an electrolyte at a temperature between approximately 15° C. and approximately 30° C. and then applying a voltage across the slug, the voltage being between approximately 175 Volts and approximately 375 Volts; subsequent heat treating may be performed at a temperature between approximately 400° C. and approximately 460° C. for a time between approximately 50 minutes and approximately 65 minutes. Following heat treating, the anode is reformed by a second anodization.
摘要:
A therapeutic medical device system comprising an electrolytic capacitor including an anode, cathode and an electrolyte. The anode is anodized in an electrolyte comprises an aqueous solution of alkanol amine, phosphoric acid and an organic solvent preferably defined by formula 1: CH3—(OCH2CH2)m—OCH3 Formula 1 wherein m is an integer from 3 to 10.
摘要:
An electrolytic capacitor cell for use in implantable medical devices and associated method for manufacture are provided. The capacitor cell includes an electrode substrate having a dielectric layer formed thereon by atomic layer deposition. In various embodiments, the dielectric layer includes an oxide of one or more valve metals.
摘要:
The present invention generally relates to improved capacitors; in particular, the present invention provides advanced valve metal (AVM) anodes and methods for fabricating AVM anodes having complex surface and interior features for use in high energy density capacitors. Such anodes find use in high voltage capacitors incorporated into implantable medical devices (IMDs), among other uses. The AVM anodes may be pressed into virtually any arbitrary shape and may have a gradually changing (or substantially constant) density profile throughout the AVM anode. Such AVM anodes may also be perforated or shaped to receive one or more cathode members. The AVM anodes enhance packaging efficiency for compact high energy density capacitors.
摘要:
A capacitor in an implantable medical device is provided. The capacitor having an anode, a cathode including a conductive coating, and an electrolyte disposed and in contact between the anode and the cathode. The conductive coating is composed of a chemisorbed conductive layer that is interposed between a metal substrate and a layer including a mix of activated carbon with a metal-oxide and electrolyte disposed and in contact between the anode and the cathode.
摘要:
A battery cell is presented. The battery cell includes an anode, a cathode spaced from and operatively associated with the anode, an electrolyte operatively associated with the anode and the cathode. A layered separator includes a plurality of separator material layers disposed between the anode and cathode. The plurality of separator material layers includes a first layer and a second layer. The first layer is characterized by a first value of a physical property and the second layer is characterized by a second value of the physical property.
摘要:
Methods of delivering optical stimulation to a target tissue from an optical stimulation device are provided. One method comprises sensing a temperature at the optical stimulation device or proximate to the optical stimulation device, and adjusting the delivery of light to the target tissue based on the sensed temperature. Another method comprises delivering the light to the target tissue with an optical light guide and sensing bioelectric signals with a sense electrode, wherein the optical light guide and the sense electrode each comprise a material that produces substantially no induced current in an electromagnetic field. Another method comprises delivering light from a light source of an optical stimulation device to a window of the optical stimulation device, delivering the light from the window to an optical light guide optically connected to the window, and delivering the light to a target tissue via the optical light guide.
摘要:
Methods of delivering optical stimulation to a target tissue from an optical stimulation device are provided. One method comprises sensing a temperature at the optical stimulation device or proximate to the optical stimulation device, and adjusting the delivery of light to the target tissue based on the sensed temperature. Another method comprises delivering the light to the target tissue with an optical light guide and sensing bioelectric signals with a sense electrode, wherein the optical light guide and the sense electrode each comprise a material that produces substantially no induced current in an electromagnetic field. Another method comprises delivering light from a light source of an optical stimulation device to a window of the optical stimulation device, delivering the light from the window to an optical light guide optically connected to the window, and delivering the light to a target tissue via the optical light guide.