MIM Capacitor and Low-TCR Resistor Co-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 utilization.
Innovation Solution
A semiconductor device is fabricated using a single patterning process where the bottom metal plate of the MIM capacitor and the metal thin film of the low TCR metal resistor are concurrently defined using the same metal material with different patterns in a common mask, reducing the need for multiple patterning steps.
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 reliability are improved, but fabrication cost, time, and resource utilization 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 mask layer with different pattern regions, both components are defined simultaneously during one etching step, eliminating the need for separate patterning processes and reducing fabrication steps while maintaining manufacturing precision
Solution Approach 2:
The common 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 layer. This multi-functional mask design allows one patterning process to accomplish what previously required multiple separate patterning steps, improving fabrication efficiency without sacrificing precision
2Manufacturing precision
If multiple patterning processes are used to fabricate MIM capacitors and low TCR metal resistors, then manufacturing precision and reliability are improved, but fabrication cost increases
Solution Approach 1:
The patent merges multiple patterning operations into a single process step by using a common mask layer that patterns both MIM capacitor and low TCR metal resistor features simultaneously. This consolidation reduces the number of expensive patterning steps required, lowering fabrication costs while maintaining the necessary manufacturing precision through carefully designed pattern regions in the unified mask
3Manufacturing precision
If multiple patterning processes are used to fabricate MIM capacitors and low TCR metal resistors, then manufacturing precision and reliability are improved, but resource utilization increases
Solution Approach 1:
The patent combines multiple patterning operations into a single process using a common mask layer, which reduces the cumulative consumption of photoresist materials, etching chemicals, and other resources associated with multiple separate patterning steps. The unified approach maintains manufacturing precision while minimizing resource usage by eliminating redundant material application and removal cycles
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.