Semiconductor Optical Package for Non-Invasive Blood Sugar Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current non-invasive medical applications using optical devices for blood sugar level measurement face challenges with weak optical power from LED and VCSEL sources, leading to high noise and low signal intensity, and the broad emission spectrum of LEDs prevents them from being used as laser light sources.
Innovation Solution
A light-emitting device package is developed that emits light at a specific wavelength of 1650 nm with power equal to or greater than 30 mW, utilizing packaging techniques to direct the light emission and preserve collimated light, integrated with a housing and optical elements, including a protection element to enhance signal-to-noise ratio and prevent damage during manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED or VCSEL light sources are used for non-invasive blood sugar measurement, then the device can perform optical measurement, but the optical power is weak leading to high noise and low signal intensity
Solution Approach 1:
The patent combines multiple functional elements into an integrated optical package: the light source, collimating lens, protective elements, and housing are merged into a single packaged unit. This integration ensures optimal positioning and collaboration of components to maximize light output and directionality, thereby improving signal intensity and reducing noise.
Solution Approach 2:
The patent employs a collimating lens with specific curvature to focus and direct the light from the LED or VCSEL source. The curved optical elements shape the light beam to maintain collimation over distance, concentrating optical power in a directed beam rather than allowing it to disperse, thus improving signal intensity at the measurement point.
2Adaptability or versatility
If LED is used as light source, then the device can be manufactured with broader wavelength emission, but the broad emission spectrum prevents it from functioning as a laser light source
Solution Approach 1:
The patent introduces optical elements such as collimating lenses and potentially dichroic mirrors as intermediaries to process the broad-spectrum LED light. These elements can filter or direct specific wavelength ranges while maintaining the LED's advantage of broad emission capability, effectively mediating between the broad spectrum source and the need for coherent-like performance.
3Ease of manufacture
If the light source is directly exposed without protection, then the manufacturing process is simpler, but the light source is vulnerable to damage during manufacturing and operation
Solution Approach 1:
The patent incorporates protective elements into the package design before the light source is subjected to manufacturing stresses or operational conditions. The protective cover or encapsulation is pre-installed to shield the light source from physical damage, moisture, and other environmental factors that could cause failure during assembly or use.
Solution Approach 2:
The light source is nested within a protective housing structure that provides multiple layers of protection. The collimating lens is positioned between the light source and the external environment, and additional protective elements may be nested around the light source, creating a nested configuration that protects the vulnerable components while maintaining optical functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a reliable and efficient non-invasive medical device capable of accurate blood sugar level measurement by ensuring sufficient light power and collimated emission, overcoming previous issues of noise and signal intensity with improved signal-to-noise ratio and device durability.
Implementation Method 1
The optical apparatus may include an optical/light source. The optical/light source may include but is not limited to a light-emitting diode (LED), a vertical-cavity surface-emitting laser (VCSEL)
Implementation Method 2
packaging techniques to direct the light emission and preserve collimated light
Data Source
AI summary
A semiconductor package includes a first substrate having a first surface, a second substrate on the first surface of the first substrate, the second substrate having a first surface and a second surface adjacent to the first surface, and the first surface of the second substrate being disposed on the first surface of the first substrate, and a light source on the second surface of the second substrate. A method for manufacturing the semiconductor device package is also provided.