Photoelectric Conversion Apparatus Insulation Layer Side Surface Connection
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Solution Overview
Problem
Existing photoelectric conversion apparatuses face disconnection issues in the upper electrode due to thin thickness at regions where side surfaces and upper surfaces of recessed portions intersect, leading to instability in voltage supply.
Innovation Solution
Incorporating insulation layers between photoelectric conversion elements and electrically connecting the upper electrode to connection lines on the side surfaces of these layers, ensuring stable electrical connections and preventing disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the upper electrode is formed on the semiconductor substrate with recessed portions, then the photoelectric conversion sensitivity is improved, but the upper electrode thickness becomes thin at the top regions causing disconnection
Solution Approach 1:
The patent introduces an intermediary structure (protrusion extending from the lower electrode through the recessed portion) that acts as a bridge to support the upper electrode. This protrusion prevents the upper electrode from becoming too thin at the top regions by providing structural reinforcement, thereby preventing disconnection while maintaining the recessed portion configuration that improves photoelectric conversion sensitivity.
2Productivity
If the upper electrode thickness is reduced at top regions to match the recessed portion depth, then the photoelectric conversion efficiency is enhanced, but the electrode becomes prone to disconnection
Solution Approach 1:
The patent applies local quality by creating a protrusion with specific dimensional characteristics (width and height) that is localized at the bottom of the recessed portion. This protrusion provides enhanced structural support exactly where needed (at the thinnest part of the upper electrode) without affecting the overall thinness of the upper electrode at the top regions, thus maintaining both efficiency and integrity.
3Measurement precision
If the recessed portions are formed deeper to improve sensitivity, then the photoelectric conversion performance is enhanced, but the upper electrode disconnection risk increases
Solution Approach 1:
The patent segments the electrode structure into distinct components: the lower electrode, the protrusion extending through the recessed portion, and the upper electrode. This segmentation allows each component to be optimized independently - the protrusion can be designed with specific dimensions to provide support without increasing overall device complexity, while enabling deeper recessed portions for improved sensitivity.
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 stabilizes voltage supply to the photoelectric conversion apparatus by preventing disconnection of the upper electrode, enhancing the reliability and performance of the device.
Implementation Method 1
a light-receiving element which includes elements which have photoelectric conversion portions in semiconductors
Data Source
AI summary
The present disclosure provides a photoelectric conversion apparatus which includes a semiconductor substrate, signal output units disposed on the semiconductor substrate, a plurality of photoelectric conversion layers disposed on a surface of the substrate, and an upper electrode in this order. The photoelectric conversion apparatus further includes insulation layers which are disposed between the plurality of photoelectric conversion layers and which have lines connected to power supply units. The upper electrode and the lines are electrically connected to each other on side surfaces of the insulation layers.