Through Silicon Via Insulation Reducing Parasitic Capacitance
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Solution Overview
Problem
Conventional semiconductor devices with through silicon via structures suffer from high parasitic capacitance due to conductive lines being in close proximity, which hampers signal transmission speed.
Innovation Solution
A semiconductor device with a through silicon via structure featuring an insulation layer separating conductive lines, reducing parasitic capacitance, and a manufacturing method involving a substrate, insulation layer, and conductive lines extending from the top to the bottom surface, with a dielectric layer and barrier layers for improved adhesion and planarization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conductive lines are placed in close proximity in through silicon via structures, then device integration density is improved, but parasitic capacitance increases and signal transmission speed deteriorates
Solution Approach 1:
An insulation layer is introduced as an intermediary material between adjacent conductive lines in the through silicon via structure. This insulation layer acts as a mediator that electrically isolates the conductive lines from each other, reducing parasitic capacitance and improving signal transmission speed while allowing the conductive lines to remain in close proximity for high integration density.
2Speed
If an insulation layer is added to separate conductive lines, then parasitic capacitance is reduced and signal transmission speed is improved, but device complexity and manufacturing steps increase
Solution Approach 1:
The insulation layer formation process is merged with the existing through silicon via manufacturing process. The insulation layer is deposited as part of the via formation sequence, combining multiple functions (isolation, planarization, and structural support) into a single integrated process step, thereby minimizing the increase in device complexity and manufacturing steps.
3Speed
If an insulation layer is added to separate conductive lines, then parasitic capacitance is reduced and signal transmission speed is improved, but the number of manufacturing steps increases
Solution Approach 1:
The insulation layer is deposited in advance during the via formation process, before the conductive lines are fully established. This preliminary action ensures that the insulation layer is already in place to prevent parasitic capacitance formation, and the process is integrated into the standard manufacturing sequence without requiring additional standalone steps.
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
The solution reduces parasitic capacitance, enhancing signal transmission speed by isolating conductive lines with an insulation layer, thereby improving the performance of the semiconductor device.
Implementation Method 1
Conventional semiconductor devices with through silicon via structures suffer from high parasitic capacitance due to conductive lines being in close proximity, which hampers signal transmission speed
Implementation Method 2
a dielectric layer disposed on the substrate and encircles the semiconductor component
Implementation Method 3
the insulation layer is a spin-on-glass (SOG) layer
Data Source
AI summary
The present disclosure relates to a semiconductor device and method of manufacturing the same. The semiconductor device includes a substrate and a through silicon via structure. The through silicon via is disposed in the substrate and includes an insulation layer and a plurality of conductive lines. The conductive lines are separated from each other by the insulation layer and extend from a top surface of the insulation layer to a bottom surface opposite to the top surface.