Fiducial Marker Alignment for Resistor Singulation
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Solution Overview
Problem
Conventional methods for singulating high current, low resistance shunt resistors from sheets are inefficient due to reliance on device chip features for alignment, which is not suitable for resistors, leading to potential damage during the cutting process.
Innovation Solution
Incorporating fiducial markers at predetermined locations on the sheet, which can be imaged by an imaging system to accurately align and orient the sheet relative to the singulating device, allowing for precise cutting without damaging the resistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods use device chip features for alignment during singulation, then the alignment process is simple, but the cutting precision is insufficient and resistors may be damaged
Solution Approach 1:
The patent introduces fiducial markers as intermediary reference elements on the sheet that serve as mediators between the imaging system and the resistors. These markers provide stable, easily detectable reference points that enable precise alignment without requiring complex features on the resistors themselves, thus improving cutting precision while keeping the alignment system relatively simple
Solution Approach 2:
The patent creates a reference copy of the sheet's position and orientation information by imaging the fiducial markers. This optical copy of the sheet's spatial configuration is then used to guide the singulating device, enabling precise cutting without direct mechanical contact or complex alignment mechanisms
2Reliability
If the sheet is not properly aligned during singulation, then the cutting process is faster, but the resistors are damaged
Solution Approach 1:
The patent performs preliminary alignment by imaging the fiducial markers and calculating the sheet's position and orientation before the cutting process begins. This preliminary action ensures the sheet is correctly positioned prior to singulation, preventing resistor damage while maintaining efficient cutting operations
Solution Approach 2:
The patent implements a feedback mechanism where the imaging system continuously monitors the sheet's position through fiducial markers and provides real-time alignment information to the singulating device. This feedback loop ensures the sheet remains properly aligned during cutting, maintaining both resistor integrity and production efficiency
Data Source
AI summary
A sheet of electronic components includes a plurality of electronic components. A plurality of connecting members mechanically connects the electronic components together. A first fiducial marker is located at a first predetermined location on the sheet and a second fiducial marker is located at a second predetermined location on the sheet.