Optoelectronic Component Crosstalk Prevention via Absorber Particles
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Solution Overview
Problem
Conventional optoelectronic components with radiation-emitting and detecting semiconductor chips require large space and high production costs due to separate housings, and they suffer from radiation crosstalk, which affects their flexibility and reliability.
Innovation Solution
Integration of radiation-emitting and detecting semiconductor chips within a common housing with separate cavities, where the radiation-emitting chip is potted with a first compound and the radiation-detecting chip is potted with a second compound containing absorber particles to absorb emitted radiation, preventing crosstalk and allowing detection of external radiation only.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radiation-emitting and detecting semiconductor chips are arranged in separate housings, then reliability is improved by preventing radiation crosstalk, but device complexity and space requirements increase
Solution Approach 1:
The patent combines the radiation-emitting semiconductor chip and radiation-detecting semiconductor chip into a single housing, eliminating the need for separate housings. This merging reduces device complexity and space requirements while maintaining reliable operation through internal radiation shielding structures.
Solution Approach 2:
The housing is segmented into distinct cavities: a first cavity for the radiation-emitting chip and a second cavity for the radiation-detecting chip. This segmentation allows physical separation of the chips within the same housing, preventing radiation crosstalk while maintaining compact integration.
2Reliability
If separate housings are used for radiation-emitting and detecting chips, then radiation crosstalk is prevented, but production costs and component size increase
Solution Approach 1:
By merging both semiconductor chips into a single housing with integrated cavities and shielding, the patent reduces the total number of components and assembly steps, thereby lowering production costs while maintaining reliable radiation detection accuracy.
Solution Approach 2:
The patent employs a composite structure combining housing material, cavity walls, and radiation shielding material within a single integrated component. This composite approach enables effective radiation blocking while maintaining cost-effective manufacturing through consolidated production.
3Device complexity
If chips are integrated in a common housing, then space requirements and production costs are reduced, but radiation crosstalk may interfere with detection accuracy
Solution Approach 1:
The housing is divided into separate cavities for the radiation-emitting and radiation-detecting chips, creating physical barriers that prevent radiation crosstalk while maintaining compact integration. This segmentation ensures detection accuracy is preserved despite close proximity of the chips.
Solution Approach 2:
Radiation shielding material is introduced as an intermediary between the radiation-emitting chip and radiation-detecting chip. This shielding layer absorbs or blocks stray radiation, preventing crosstalk interference while allowing the chips to remain integrated in a common housing.
4Reliability
If absorber particles are added to the second potting compound, then radiation crosstalk is reduced, but manufacturing complexity increases
Solution Approach 1:
The second potting compound is formulated as a composite material containing absorber particles distributed throughout the matrix. This composite structure provides effective radiation absorption while maintaining a relatively simple potting process, as the particles are incorporated into the compound before or during the potting operation.
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
This configuration results in a compact, cost-effective, and flexible optoelectronic component that reliably reacts to external radiation without interference between the chips, enabling efficient detection of external radiation while minimizing self-emission influence.
Implementation Method 1
absorber particles are embedded in the second potting compound, the absorber particles being at least partly absorbing the radiation emitted by the radiation-emitting semiconductor chip
Implementation Method 2
the radiation-detecting semiconductor chip has an active layer that detects radiation
Implementation Method 3
the radiation-emitting semiconductor chip has an active layer that generates radiation
Data Source
AI summary
An opto-electronic component includes a housing, a radiation-emitting semiconductor chip and a radiation-detecting semiconductor chip. A first cavity and a second cavity are formed in the housing, wherein the radiation-emitting semiconductor chip is arranged in the first cavity and is cast by means of a first casting compound. The radiation-detecting semiconductor chip is arranged in the second cavity and cast by means of a second casting compound, wherein absorber particles are embedded in the second casting compound which are suitable for at least partially absorbing the radiation emitted by the radiation-emitting semiconductor chip.