Process Tunable Resistor With Segmented Parallel Legs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In semiconductor component fabrication, process changes affecting transistors often require adjustments in resistors, leading to variations in resistance values, which can compromise circuit design and are time-consuming and costly to address.
Innovation Solution
A process tunable resistor is fabricated with fixed connection points and adjustable elements, such as sliding turns or parallel sub-legs, allowing resistance values to be precisely matched to predefined values without altering the circuit design, using modified mask layers and semiconductor processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If process changes are made to improve transistor performance, then transistor performance is improved, but resistor resistance values vary and circuit design is compromised
Solution Approach 1:
The resistor is divided into multiple parallel legs (first leg, second leg, third leg) with selectable configurations. By segmenting the resistor into discrete parallel paths, the circuit can achieve multiple distinct resistance values (e.g., R1, R2, R3) by selectively activating different leg combinations, thereby compensating for process-induced resistance variations.
Solution Approach 2:
The resistor structure incorporates selectable or switchable leg configurations that allow dynamic adjustment of the resistance value. This dynamic capability enables the circuit to adapt to process changes by selecting appropriate resistance values post-fabrication, resolving the contradiction between process optimization and resistance precision.
2Adaptability or versatility
If a large variation in resistance is provided in circuit design to accommodate process changes, then process changes can be accommodated, but architecture design is compromised
Solution Approach 1:
By segmenting the resistor into multiple parallel legs with selectable configurations, the design achieves adaptability to process changes without requiring large overall resistance variations. The segmented structure allows precise resistance selection within a compact architecture, avoiding the need for complex circuit redesigns.
Solution Approach 2:
The resistor structure serves multiple functions: it provides fixed connection points for stable circuit integration, offers selectable resistance values for process compensation, and maintains consistent physical footprint. This multi-functionality allows the same resistor structure to accommodate various process changes without increasing architectural complexity.
3Manufacturing precision
If new circuit design or die revision is performed to address resistor resistance changes, then resistance precision is improved, but development time and cost increase
Solution Approach 1:
The resistor is designed with pre-configured parallel legs and fixed connection points that anticipate future process variations. This preliminary structuring allows resistance tuning through simple leg selection rather than requiring circuit redesign or die revision, significantly reducing development time and cost when process changes occur.
Solution Approach 2:
The invention enables resistance value adjustment through parameter selection (choosing different leg configurations) rather than requiring physical redesign. This parameter-based approach allows rapid adaptation to process changes by simply selecting appropriate resistance values from the predefined set, avoiding time-consuming redesign cycles.
4Ease of manufacture
If fixed connection points are used in resistor design, then circuit design is simplified, but resistance tuning capability is limited
Solution Approach 1:
The resistor is segmented into multiple parallel legs that all connect to the same fixed connection points. This segmentation maintains the simplicity of fixed connection point integration while enabling resistance tuning through selective activation of different leg combinations, thus resolving the contradiction between ease of manufacture and adaptability.
Data Source
AI summary
A process tunable resistor is fabricated by adjusting elements of the resistor during a fabrication process. The elements include legs, turns, and elements such as a parallel sub-legs, that are adjusted in the fabrication process to provide a specific user defined resistance value. The process tunable resistor provides for fixed contact points in order to support pre-existing or define circuit designs.