RESISTIVELY HEATED SMALL PLANAR FILAMENT
First Claim
Patent Images
1. A planar filament device, comprising:
- a) a layer patterned to form;
i) a pair of spaced-apart bonding pads each configured to receive an electrical connection; and
ii) a filament connected between the pair of bonding pads configured to receive an applied electric current therethrough; and
b) the filament having a non-uniform width measured in a plane of the layer and transverse to a length of the filament; and
c) the filament being wider near an intermediate portion of the filament and narrower at ends of the filament near the pair of bonding pads.
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Abstract
A planar filament comprising two bonding pads and a non-linear filament connected between the two bonding pads. The filament may be wider in the center to increase filament life. The planar filament may be mounted on a substrate for easier handling and placement. Voltage can be used to create an electrical current through the filament, and can result in the emission of electrons from the filament. The planar filament can be utilized in an x-ray tube.
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Citations
20 Claims
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1. A planar filament device, comprising:
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a) a layer patterned to form; i) a pair of spaced-apart bonding pads each configured to receive an electrical connection; and ii) a filament connected between the pair of bonding pads configured to receive an applied electric current therethrough; and b) the filament having a non-uniform width measured in a plane of the layer and transverse to a length of the filament; and c) the filament being wider near an intermediate portion of the filament and narrower at ends of the filament near the pair of bonding pads. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A planar filament device, comprising:
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a) a layer patterned to form; i) a pair of spaced-apart bonding pads each configured to receive an electrical connection; and ii) a filament connected between the pair of bonding pads configured to receive an applied electric current therethrough; and b) the filament being suspended between the bonding pads without any other contacting structure on a bottom surface thereof; c) the filament being flat with planar top and bottom surfaces that are substantially parallel with respect to one another; d) the filament having a nonuniform width measured in a plane of the layer and transverse to a length of the filament; e) the filament being wider near an intermediate portion of the filament and narrower at ends of the filament near the pair of bonding pads; f) the filament extending non-linearly between the pair of bonding pads; and h) electrically isolated support structures supporting each of the bonding pads. - View Dependent Claims (10)
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11. A planar filament device, comprising:
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a) a substrate with a top surface; b) a layer disposed over the top surface of the substrate and patterned to form; i) a pair of spaced-apart bonding pads each configured to receive an electrical connection; and ii) a filament connected between the pair of bonding pads configured to receive an applied electric current therethrough. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A planar filament device, comprising:
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a) a substrate with a top surface; b) a layer disposed over the top surface of the substrate and patterned to form; i) a pair of spaced-apart bonding pads each configured to receive an electrical connection; and ii) a filament connected between the pair of bonding pads configured to receive an applied electric current therethrough; and c) the filament being suspended between the bonding pads without any other contacting structure on a bottom surface thereof; d) the filament having a non-uniform width measured in a plane of the layer and transverse to a length of the filament; e) the filament being wider near an intermediate portion of the filament and narrower at ends of the filament near the pair of bonding pads; and f) the filament extending non-linearly between the pair of bonding pads. - View Dependent Claims (20)
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Specification