CERAMIC EMITTER SUBSTRATE
First Claim
1. An optical medical device that transmits optical radiation into a fleshy tissue site, the optical radiation detected after absorption by pulsatile blood flow within the fleshy tissue site so as to compute constituents of the pulsatile blood flow, the optical medical device comprising:
- a generally rectangular-cross-sectioned ceramic body having a top side, a bottom side and an edge adjoining the sides;
a cavity defined by the ceramic body disposed on the top side;
a plurality of conductive bonding pads disposed within the cavity;
a plurality of conductive solder pads disposed on the bottom side proximate the edge;
a plurality of conductive traces and a plurality of conductive vias forming an interconnect of the bonding pads and the solder pads so that light emitting diodes (LEDs) can be attached to the bonding pads and individually activated as an emitter array via row and column drive signals applied to the solder pads in order to transmit optical radiation out of the cavity.
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0 Petitions
Accused Products
Abstract
A ceramic emitter substrate has a substrate body with top and bottom sides and a cavity disposed on the top side. Bonding pads are disposed within the cavity and solder pads are disposed on the bottom side. Light emitting diodes (LEDs) are electrically connected to the bonding pads. Low-resistance conductors are disposed within the ceramic substrate body so as to interconnect the bonding pads and the solder pads. The interconnect is configured so that the LEDs can be individually activated as an array via row and column drive signals applied to the solder pads.
102 Citations
25 Claims
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1. An optical medical device that transmits optical radiation into a fleshy tissue site, the optical radiation detected after absorption by pulsatile blood flow within the fleshy tissue site so as to compute constituents of the pulsatile blood flow, the optical medical device comprising:
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a generally rectangular-cross-sectioned ceramic body having a top side, a bottom side and an edge adjoining the sides; a cavity defined by the ceramic body disposed on the top side; a plurality of conductive bonding pads disposed within the cavity; a plurality of conductive solder pads disposed on the bottom side proximate the edge; a plurality of conductive traces and a plurality of conductive vias forming an interconnect of the bonding pads and the solder pads so that light emitting diodes (LEDs) can be attached to the bonding pads and individually activated as an emitter array via row and column drive signals applied to the solder pads in order to transmit optical radiation out of the cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A ceramic emitter substrate comprising:
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a ceramic body having a top side, an opposite bottom side and an edge disposed between and along the periphery of the top and bottom sides; the ceramic body having a first layer corresponding to the top side, a second layer adjacent the first layer, a third layer adjacent the second layer and a fourth layer corresponding to the bottom side; a cavity defined by the first layer; a plurality of solder pads disposed on the fourth layer on the bottom side proximate the edge; a plurality of bonding pads disposed on the second layer and on the third layer accessible via the cavity; a plurality of traces disposed on the second, third and fourth layers and vias disposed between the second, third and fourth layers so as to interconnect the solder pads and the bonding pads. - View Dependent Claims (10, 11, 12, 13)
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14. A method of constructing an optical sensor having emitters that transmit optical radiation having multiple wavelengths into a tissue site and a detector that generates a sensor signal responsive to the optical radiation after absorption by the tissue site comprising the steps of:
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providing a ceramic substrate having a top side and a bottom side; defining a cavity in the top side of the ceramic substrate; mounting a plurality of light emitting devices within the cavity; and routing a plurality of low-resistance conductors on and within the ceramic substrate so as to transmit drive signals to the light emitting devices from a source external to the ceramic substrate. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A ceramic emitter substrate configured to mount in an optical sensor and to transmit optical radiation into a fleshy tissue site, the optical radiation detected after absorption by pulsatile blood flow, a signal responsive to the detected optical radiation communicated to a monitor that computes constituents of the pulsatile blood flow, the ceramic emitter substrate comprising:
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a ceramic substrate means for housing a plurality of LEDs; a plurality of solder pad means for physically mounting and electrically interconnecting the ceramic substrate means to a sensor; a plurality of bonding pad means for mounting and electrically interconnecting the LEDs to the ceramic substrate means; and a plurality of low resistance conductive means for interconnecting the solder pad means and the bonding pad means. - View Dependent Claims (22, 23, 24)
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25. The ceramic emitter substrate according to claim 25 further comprising a plurality of low resistance conductive means for interconnecting between the solder pad means and the first and second sets of bonding pad means.
Specification