Step-Like Cavity Resonator Trenches to Limit Etchant Corrosion
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Solution Overview
Problem
Long manufacturing times for semiconductor devices, particularly in radio-frequency (RF) resonator structures, lead to structural damage and corrosion due to exposure to etchant gases, resulting in defects such as altered resonant frequencies or inoperable resonators.
Innovation Solution
A semiconductor die with graduated, step-like resonator trenches of varying depths within a dielectric layer, along with reduced manufacturing steps, to minimize exposure to etchant gases and prevent corrosion, while allowing customization of resonant frequencies through dielectric constant control and structural design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional semiconductor manufacturing processes are used for RF resonator structures, then manufacturing precision can be maintained, but manufacturing time increases leading to structural damage and corrosion
Solution Approach 1:
The patent applies preliminary action by forming the resonator cavity and filling it with dielectric material and metal layer before completing other semiconductor device fabrication steps. This sequence allows the resonator structure to be established early, reducing its exposure time to potential corrosive environments during subsequent manufacturing processes while maintaining the necessary precision through controlled deposition and etching steps.
2Reliability
If extended manufacturing time is allowed for complete device fabrication, then device functionality can be ensured, but resonator structures are exposed longer to etchant gases causing corrosion
Solution Approach 1:
The patent segments the manufacturing process into distinct phases, with the resonator structure fabrication completed as a separate, self-contained module. The resonator cavity is etched, filled with dielectric material, and metallized in dedicated steps before other device components are fabricated. This segmentation isolates the resonator structure from prolonged exposure to etchant gases used in other fabrication steps, reducing corrosion while maintaining device reliability.
Solution Approach 2:
The patent uses dielectric material as an intermediary substance to protect the resonator cavity walls from direct exposure to corrosive environments during subsequent manufacturing steps. The dielectric layer acts as a barrier between the resonator structure and potential harmful factors, allowing extended manufacturing time for complete device fabrication without compromising resonator integrity.
3Adaptability or versatility
If resonator trenches are made deeper to improve resonator performance, then resonant frequency control is enhanced, but manufacturing complexity and exposure time increase
Solution Approach 1:
The patent applies local quality by creating resonator trenches with specific depth variations at different locations to achieve desired resonant frequencies. Each trench is tailored with its optimal depth and dimensions based on the required resonant characteristics, while the overall manufacturing process maintains consistency through standardized fabrication steps. This approach enables resonant frequency customization without proportionally increasing manufacturing complexity.
Data Source
AI summary
Devices and methods of manufacture for a graduated, “step-like,” semiconductor structure having two or more resonator trenches. A semiconductor structure may comprise a first resonator and a second resonator. The first resonator comprises a first metallic resonance layer and a capping plate having a bottom surface that is a first distance from a distal end of the first metallic resonance layer. The second resonator comprises a second metallic resonance layer and the capping plate, in which the bottom surface is a second distance from a from a distal end of the second metallic resonance layer, and in which first distance is different from the second distance.