Maxim Integrated Products, Inc.
OPTICAL DIAGNOSTIC SENSOR SYSTEMS AND METHODS

Abstract:

Described are embodiments of methods for determining physiological data, such as vital signs, by using an optical diagnostic sensor, the method comprising receiving at a semiconductor material, which is located between a photodiode and a trench, an opening into silicon, or a backside wafer-level package (WLP) coating, light of a first wavelength and light of a second wavelength that are above the wavelength of red light, the semiconductor material acting as a filter that blocks wavelengths below the wavelength of red light; detecting, at the photodiode, light of at least one of the first wavelength or the second wavelength; and using the detected light to determine a vital sign.