Waveguide Photodetector PN Junction Layout for Dense Optical Chips
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The semiconductor industry faces challenges in increasing the density of optical devices due to limitations imposed by the layout of electrical chips, which restricts the arrangement and number of optical components on optical chips, especially as technology advances towards smaller product scales.
Innovation Solution
An electro-optical device is integrated onto a single chip, incorporating a photodetector structure with a waveguide and photoelectric material at a P/N junction, allowing for the integration of optical and electrical components, thereby reducing product size and enhancing device density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical devices are arranged on separate optical and electrical chips, then the layout flexibility is improved, but the device density and product size increase
Solution Approach 1:
The patent merges optical devices and electrical components onto a single semiconductor chip, eliminating the need for separate optical and electrical chips. This integration reduces the overall product size while maintaining layout flexibility through unified design and placement capabilities on the single chip substrate.
2Quantity of substance
If optical devices are integrated onto a single chip with electrical components, then the device density is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent segments the single chip into distinct functional regions: an optical region for optical devices and an electrical region for electrical components. This spatial segmentation allows for specialized processing and layout optimization in each region while maintaining overall integration, thereby managing manufacturing complexity through organized zonation.
Solution Approach 2:
The patent applies local quality by providing different structural configurations for optical and electrical regions on the same chip. The optical region receives optical-specific processing and materials, while the electrical region receives electrical-specific processing, allowing each region to be optimized for its specific function while maintaining high device density through integrated placement.
3Productivity
If the product scale is reduced to advance technology nodes, then the device integration is improved, but the arrangement of optical components is restricted
Solution Approach 1:
The patent utilizes three-dimensional vertical stacking and multi-layer structures to arrange optical components on the single chip. By transitioning from two-dimensional planar arrangement to three-dimensional spatial configuration, the patent achieves high device integration at reduced product scales while maintaining arrangement flexibility through vertical placement and multi-layer routing.
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 integration enables a compact electro-optical device that efficiently converts optical signals into electrical signals, improving signal transmission and reducing the overall size of the semiconductor structure.
Implementation Method 1
a photoelectric material disposed proximal to the P/N junction
Data Source
AI summary
A semiconductor structure includes a waveguide structure on a substrate. The waveguide structure includes a first protrusion having a first dopant type; a first lower portion having the first dopant type; a second lower portion having a second dopant type, wherein the second dopant type is different from the first dopant type, and an interface of the first lower portion and the second lower portion defines a PN interface; and a second protrusion having the second dopant type. The semiconductor structure further includes a photoelectric material proximate the PN interface, wherein the photoelectric material extends above the PN interface.