Anti-Interference Semiconductor Device for Optical Transceivers
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Solution Overview
Problem
Current optical transceiver technologies face limitations in scaling bandwidth and data rate due to high costs associated with multiple optical links and interference issues, which hinder the improvement of chip speed and power consumption performance.
Innovation Solution
An anti-interference semiconductor device is developed, comprising a backside metallization layer, p++ carrier wafer layer, P-type epitaxial layer, isolation layer, and metal layer with deep through-silicon vias and heavily doped grooves, arranged to maximize chip stacking density and minimize size, using through-silicon via technology to isolate devices and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple groups of parallel optical devices and optical fibers are used to increase data rate, then the data rate of the optical link is improved, but the cost and device complexity significantly increase
Solution Approach 1:
The patent combines multiple optical devices (laser drivers, transconductance amplifiers, clock data restorers) onto a single semiconductor chip, integrating functions that would traditionally require separate devices and optical fibers. This merging approach achieves high data rates while reducing the number of external connections and overall system complexity.
Solution Approach 2:
The patent transitions from a two-dimensional layout (separate devices connected by optical fibers) to a three-dimensional integrated structure using through-silicon vias that penetrate vertically through the chip substrate. This vertical integration enables multiple functional layers to be stacked, increasing data rate capability without proportionally increasing device complexity.
2Ease of manufacture
If devices are made into different chips to simplify manufacturing, then the ease of manufacture is improved, but the chip speed and power consumption performance deteriorate
Solution Approach 1:
The patent integrates multiple functional devices (laser drivers, amplifiers, restorers) onto a single semiconductor chip using standard semiconductor manufacturing processes. This integration maintains manufacturing ease while dramatically improving chip speed by eliminating inter-chip signal transmission delays and reducing power consumption through shorter internal connections.
3Productivity
If through-silicon via technology is used to increase chip stacking density, then the productivity and chip speed are improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent employs through-silicon via technology to create vertical interconnections that penetrate the chip substrate, enabling multiple functional layers to be stacked in the third dimension. This approach increases chip stacking density and productivity while using established semiconductor fabrication techniques to manage manufacturing precision requirements.
4Object-affected harmful factors
If deep through-silicon vias and heavily doped grooves are formed to isolate devices, then the interference between devices is reduced, but the manufacturing complexity increases
Solution Approach 1:
The patent segments the semiconductor chip into isolated regions using deep through-silicon vias and heavily doped grooves that physically and electrically separate adjacent devices. This segmentation reduces electromagnetic interference and crosstalk between devices while using standard semiconductor processing steps to manage the added manufacturing complexity.
Solution Approach 2:
The patent applies localized doping (heavily doped grooves) and structural modifications (through-silicon vias) at specific locations between devices to create isolation regions. This approach reduces interference where needed while maintaining device performance in active regions, balancing isolation effectiveness with manufacturing complexity.
Data Source
AI summary
Provided is an anti-interference semiconductor device for an optical transceiver. The semiconductor device includes: a back metallization layer, a p++ bearing wafer layer, a P-type epitaxial layer, an isolation layer and a metal layer arranged from bottom to top. The back metallization layer serves as a substrate, on which the p++ bearing wafer layer is formed. The P-type epitaxial layer is formed on the p++ bearing wafer layer. The metal layer is formed on the isolation layer. The semiconductor device includes at least two N-type heavily doped grooves, two P-type heavily doped grooves and a plurality of deep through-silicon vias, which are formed in the P-type epitaxial layer and the isolation layer. The deep through-silicon vias are distributed and divided into at least two rows. The N-type heavily doped grooves and the P-type heavily doped grooves are alternately arranged at two sides of the deep through-silicon vias.