Fuse-Trimmed Resistor Layout for Stable High-Frequency Impedance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing chip resistors face challenges in accurately adjusting resistance values and maintaining impedance characteristics in high-frequency bandwidths due to variations in resistor lengths and configurations, leading to inconsistent performance.
Innovation Solution
The electronic part features a resistive circuit portion with a main resistor unit and a correction resistor unit, where the correction resistor unit's length is less than the main resistor unit's length, and fuses are used to adjust resistance values, allowing for precise impedance control across a high-frequency bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the resistive circuit grid uses a plurality of resistors connected in predetermined manner with connection conductive films and fuse films, then the resistance value can be adjusted by selectively blowing fuse films, but the impedance characteristics in high-frequency bandwidth become inconsistent due to variations in resistor lengths and configurations
Solution Approach 1:
The resistive circuit grid is divided into multiple resistive units that can be independently controlled through fuse films. Each resistive unit consists of resistors arranged in specific patterns (series and parallel connections) that can be selectively activated or deactivated by blowing corresponding fuse films, enabling precise resistance adjustment while maintaining consistent impedance characteristics through standardized unit designs.
Solution Approach 2:
Different regions of the resistive circuit grid are designed with specific resistor configurations and fuse film arrangements to achieve local optimization. The fuse films are strategically positioned to control current paths in different areas, allowing localized adjustment of resistance while maintaining overall impedance consistency through careful design of each region's electrical characteristics.
2Adaptability or versatility
If fuse films are used to selectively blow and separate resistive units, then resistance values can be set as required, but the process complexity increases due to multiple fuse blowing operations
Solution Approach 1:
The resistive circuit grid is pre-configured with multiple fuse films in specific patterns during manufacturing, creating a standardized structure that enables subsequent resistance adjustment through simple fuse blowing operations. The preliminary arrangement of fuse films and resistive units allows for efficient post-manufacturing customization without requiring complex reconfiguration processes.
Solution Approach 2:
The resistance value is adjusted by changing the electrical state of fuse films from intact to blown, thereby altering the circuit configuration. This parameter change approach allows for simple binary control (connected/disconnected) of resistive units, enabling flexible resistance setting through minimal operational steps rather than complex mechanical or electrical adjustments.
Data Source
AI summary
The present disclosure provides an electronic part. The electronic part includes: a substrate, having a first main surface; a first external terminal and a second external terminal, formed on the first main surface and spaced apart from each other; and a resistive circuit portion, formed on the first main surface and electrically connected to the first external terminal and the second external terminal. The resistive circuit portion includes: a first wiring, formed on the first main surface and to which the first external terminal is electrically connected; a second wiring, formed on the first main surface and electrically connected to the second external terminal; and a first and second resistor unit that are electrically connected to the first wiring and the second wiring. A length of the second resistor unit along the first direction is less than a length of the first resistor unit along the first direction.