Enhanced visible near-infrared photodiode and non-invasive physiological sensor
First Claim
1. A physiological sensor for measuring physiological parameters of a monitored patient, the physiological sensor comprising:
- a sensor housing;
an emitter configured to emit optical radiation at one or more wavelengths; and
one or more detectors configured to be positioned proximate to the emitter and tissue of a patient by the sensor housing, the one or more detectors comprising a semiconductor device configured to detect the optical radiation after attenuation by the tissue and generate a detector signal responsive to the detected optical radiation,wherein the semiconductor device comprises a window layer, a diffusion region, an absorption region, and a semiconductor wafer, the absorption region being between the window layer and the semiconductor wafer, andwherein the window layer has a thickness ranging from about 25 nm to about 150 nm, the diffusion region being a p-type region, the absorption region being an undoped region or a n-type region, the semiconductor wafer being the n-type region.
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Accused Products
Abstract
Embodiments of the present disclosure include a photodiode that can detect optical radiation at a broad range of wavelengths. The photodiode can be used as a detector of a non-invasive sensor, which can be used for measuring physiological parameters of a monitored patient. The photodiode can be part of an integrated semiconductor structure that generates a detector signal responsive to optical radiation at both visible and infrared wavelengths incident on the photodiode. The photodiode can include a layer that forms part of an external surface of the photodiode, which is disposed to receive the optical radiation incident on the photodiode and pass the optical radiation to one or more other layers of the photodiode.
810 Citations
20 Claims
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1. A physiological sensor for measuring physiological parameters of a monitored patient, the physiological sensor comprising:
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a sensor housing; an emitter configured to emit optical radiation at one or more wavelengths; and one or more detectors configured to be positioned proximate to the emitter and tissue of a patient by the sensor housing, the one or more detectors comprising a semiconductor device configured to detect the optical radiation after attenuation by the tissue and generate a detector signal responsive to the detected optical radiation, wherein the semiconductor device comprises a window layer, a diffusion region, an absorption region, and a semiconductor wafer, the absorption region being between the window layer and the semiconductor wafer, and wherein the window layer has a thickness ranging from about 25 nm to about 150 nm, the diffusion region being a p-type region, the absorption region being an undoped region or a n-type region, the semiconductor wafer being the n-type region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification