Interconnect Capacitor Structure for Resistor Heat Dissipation
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Solution Overview
Problem
In advanced semiconductor manufacturing, resistors in interconnect structures cause severe joule heating and current-resistance (IR) loss due to inefficient heat dissipation, affecting device performance and reliability.
Innovation Solution
Incorporating a capacitor structure between metal lines to act as a heat pipe, efficiently dissipating heat generated by high-resistance resistors and reducing IR loss by forming a capacitor unit with an outer and inner electrode surrounded by a high-dielectric constant layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resistors are introduced in the interconnect structure, then device functionality is improved, but heat accumulation and joule heating issues worsen
Solution Approach 1:
A capacitor structure is introduced as an intermediary heat dissipation component between the resistor and surrounding environment. The capacitor includes an outer electrode, inner electrode, and dielectric layer that facilitates thermal energy transfer, acting as a mediator to conduct heat away from the resistor without directly altering the resistor's electrical function.
Solution Approach 2:
The capacitor structure serves multiple functions simultaneously: it provides electrical capacitance for circuit operation and acts as a thermal management component for heat dissipation. This multi-functionality allows the same structure to address both circuit functionality and thermal issues without adding separate dedicated cooling components.
2Reliability
If high-resistance resistors are used, then device performance requirements are met, but IR loss increases
Solution Approach 1:
The capacitor structure serves as an intermediary that provides an additional current path in parallel with the resistor. This mediator structure allows current to bypass the high-resistance path, reducing the overall IR loss while maintaining the necessary voltage drop and circuit functionality.
Solution Approach 2:
The current path is segmented into two parallel paths: one through the high-resistance resistor and another through the capacitor structure. This segmentation allows the total current to be divided, with portion of the current bypassing the resistor, thereby reducing the I²R losses in the resistive path.
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
Reduces heat accumulation near resistors by up to 10-15% and improves device performance by 1-2% through enhanced heat dissipation and reduced IR loss.
Implementation Method 1
heat generated from the resistors may not be efficiently spread through the dummy metal lines or other structures... heat generated from the resistors may not be efficiently spread
Data Source
AI summary
A method for manufacturing a semiconductor device includes: forming a first interconnect structure over a substrate, the first interconnect structure including a first conductive feature; forming a resistor structure over the first conductive feature; forming a second interconnect structure on the resistor structure, the second interconnect structure including two second conductive features which are spaced apart from each other and which are electrically connected to the resistor structure; forming a third interconnect structure on the second interconnect structure, the third interconnect structure including two third conductive features which are spaced apart from each other and which are electrically connected to the two second conductive features, respectively; and forming a capacitor structure over the resistor structure such that the capacitor structure is disposed between the two third conductive features.