Semiconductor Optical Package Light Protection Coating
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Solution Overview
Problem
Optical packages face challenges in isolating different frequency ranges of radiation, leading to inaccurate measurements due to radiation being directed to the wrong optical devices, especially when entering at low angles or not passing through filters correctly.
Innovation Solution
A light protection coating is applied to the transparent material, such as glass, with strategically placed openings that allow perpendicular radiation to reach the intended optical devices, while absorbing or reflecting unwanted radiation, thereby minimizing interference between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transparent glass cover is used to protect optical devices, then protection and transparency are improved, but radiation may be directed to neighboring optical devices at low incident angles, causing measurement inaccuracy
Solution Approach 1:
The patent applies local quality by creating openings in the light protection coating at specific locations corresponding to each optical device. This allows the coating to be selectively transparent where needed (over the optical devices) while remaining opaque in other areas, thus directing radiation locally to the correct devices and preventing cross-contamination from neighboring devices.
2Measurement precision
If filters are positioned above optical devices to block unwanted frequencies, then frequency isolation is improved, but radiation entering at low incident angles may bypass the filters, causing measurement errors
Solution Approach 1:
The patent addresses the limitation of filters working only for perpendicular radiation by adding a spatial dimension through openings in the light protection coating. The openings are positioned and sized to accept radiation within specific angular ranges, effectively adding an angular dimension to frequency filtering and ensuring that only radiation from the correct direction and frequency reaches each optical device.
3Adaptability or versatility
If multiple optical devices are located proximate each other to receive different frequency ranges, then device functionality is improved, but radiation intended for one device may reach neighboring devices, causing interference
Solution Approach 1:
The patent applies local quality by creating openings in the light protection coating at specific locations corresponding to each optical device. This allows the coating to be selectively transparent where needed (over the optical devices) while remaining opaque in other areas, thus directing radiation locally to the correct devices and preventing cross-contamination from neighboring devices.
Solution Approach 2:
The light protection coating is segmented into multiple openings, each associated with a specific optical device. This segmentation divides the coating's function into discrete regions, allowing each opening to serve its corresponding device independently while the coating material between openings provides isolation for neighboring devices.
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 effectively directs radiation to the correct optical devices, enhancing measurement accuracy by isolating different frequency ranges and preventing undesired radiation from reaching neighboring devices.
Implementation Method 1
The light protection coating has an opening located over the first optical device and has a thickness that is equal to or greater than a diameter of the first opening. The light protection coating layer is substantially resistant to radiation at the first frequency.
Implementation Method 2
The light protection coating includes one or more openings to allow light to be transmitted to an optical device within the package body
Data Source
AI summary
Embodiments of the present disclosure are directed to optical packages having a package body that includes a light protection coating on at least one surface of a transparent material. The light protection coating includes one or more openings to allow light to be transmitted to the optical device within the package body. In one embodiment, the light protection coating and the openings allow substantially perpendicular radiation to be directed to the optical device within the package body. In one exemplary embodiment the light protection coating is located on an outer surface of the transparent material. In another embodiment, the light protection coating is located on an inner surface of the transparent material inside of the package body.