MIM Capacitor and Low-TCR Resistor Single-Patterning Layout
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Solution Overview
Problem
Conventional methods for fabricating Metal-Insulator-Metal (MIM) capacitors and low Temperature Coefficient of Resistivity (TCR) metal resistors in semiconductor devices require multiple patterning processes, increasing fabrication cost, time, and resource consumption.
Innovation Solution
A single patterning process is used to concurrently define the bottom metal plate of the MIM capacitor and the metal thin film of the low TCR metal resistor, integrating them in a semiconductor device fabrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple patterning processes are used to fabricate MIM capacitors and low TCR metal resistors, then manufacturing precision and component quality are improved, but fabrication complexity and cost increase
Solution Approach 1:
The patent combines the patterning of MIM capacitor bottom plates and low TCR metal resistor thin films into a single patterning process. By using a common patterned mask layer, both components are defined simultaneously during one etching step, eliminating the need for separate patterning processes while maintaining manufacturing precision through controlled etching parameters and material selection
Solution Approach 2:
The patterned mask layer serves multiple functions: it defines both the MIM capacitor bottom plate pattern and the low TCR metal resistor thin film pattern in a single operation. This multi-functional approach allows one patterning process to accomplish what traditionally required multiple separate processes, reducing fabrication complexity without compromising component quality
2Manufacturing precision
If multiple patterning processes are used to fabricate MIM capacitors and low TCR metal resistors, then component quality is improved, but fabrication time and resource consumption increase
Solution Approach 1:
The patent merges multiple patterning operations into a single concurrent patterning process. By defining both MIM capacitor bottom plates and low TCR metal resistor thin films in one etching step using a common mask, the fabrication time and resource consumption are reduced while maintaining component quality through optimized process parameters
Solution Approach 2:
The patent performs preliminary deposition of the conductive material layer for both MIM capacitors and low TCR metal resistors before the concurrent patterning step. This preliminary action ensures that both components are ready for simultaneous definition in one patterning process, improving fabrication efficiency without compromising the quality of the final patterned structures
Data Source
AI summary
A semiconductor device includes a capacitor and a resistor. The capacitor includes a first plate, a capacitor dielectric layer disposed over the first plate, and a second plate disposed over the capacitor dielectric layer. The resistor includes a thin film. The thin film of the resistor and the first plate of the capacitor, formed of a same conductive material, are defined in a single patterning process.