Waveguide Grating Transfer via Donor Substrate
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Solution Overview
Problem
Conventional waveguide fabrication processes integrate gratings onto the substrate, making it difficult to repair or replace them, leading to increased manufacturing costs and limitations in assembly architectures.
Innovation Solution
The method involves disposing a first grating with a device structure over a donor substrate, transferring it to a waveguide substrate, allowing for individualized bonding and repair of waveguide combiners, enabling complex and non-standard architectures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If gratings are integrated onto the waveguide substrate using conventional fabrication processes, then the waveguide combiner structure is formed, but the ability to repair and replace gratings is limited and manufacturing costs increase
Solution Approach 1:
The grating is separated from the waveguide substrate and fabricated independently on a donor substrate. This segmentation allows the grating to be produced separately using standard semiconductor fabrication processes, then transferred to the waveguide substrate, enabling individual repair and replacement without replacing the entire waveguide combiner assembly.
Solution Approach 2:
The grating structure is extracted from the conventional integrated fabrication process and removed as a separate component. By fabricating the grating on a donor substrate and then transferring it to the waveguide substrate, the grating becomes an independent replaceable component that can be repaired or replaced individually.
2Adaptability or versatility
If gratings are integrated onto the waveguide substrate, then the waveguide combiner is assembled, but assembly architecture flexibility is limited
Solution Approach 1:
Dividing the waveguide combiner into separate modules (waveguide substrate, gratings on donor substrates, coating layers) enables flexible assembly architectures. Each component can be fabricated independently using standard processes and then assembled in various configurations to meet different design requirements.
Solution Approach 2:
The donor substrate acts as an intermediary carrier that facilitates the transfer of gratings to the waveguide substrate. This intermediary approach enables flexible assembly by allowing gratings to be prepared separately and then bonded to the waveguide substrate in various configurations.
3Productivity
If conventional fabrication processes are used to form gratings on waveguide substrates, then waveguide combiners are produced, but manufacturing time and costs increase
Solution Approach 1:
Gratings are fabricated in advance on donor substrates using high-volume semiconductor manufacturing processes before being transferred to waveguide substrates. This preliminary fabrication allows parallel production of multiple gratings, reducing overall manufacturing time and enabling economies of scale.
Solution Approach 2:
Multiple gratings can be fabricated simultaneously on a single donor substrate, creating copies of the same grating structure. This copying approach enables high-volume production of identical grating components that can then be distributed to multiple waveguide substrates, significantly improving manufacturing efficiency.
Data Source
AI summary
The present disclosure generally provides waveguide combiners and methods thereof. The methods include forming a waveguide combiner by disposing a first grating including a first device structure over a first donor substrate. The first grating is transferred from the first donor substrate to a waveguide substrate.