Magnetic Field Structure With Vertical Optical Positioning

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Solution Overview

Problem

The challenge lies in simultaneously applying a strong magnetic field and achieving precise optical positioning for semiconductor element testing, as existing methods often result in angular parallax, focusing difficulties, and potential damage to fine electrodes due to spatial collisions and vibrations between magnetic poles and optical positioning elements.

Innovation Solution

A magnetic field structure with two magnetic poles forming a space for the element to be tested, incorporating a magnetic field source and an optical positioning element disposed within one of the poles, allowing for precise positioning without spatial collision, using conical or stepped-cylindrical receiving holes to accommodate the optical element and maintain a strong magnetic field.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the optical positioning element is obliquely disposed at one side of the magnetic pole, then the spatial collision between magnetic pole and optical positioning element is avoided, but angular parallax and optical focusing difficulty occur, hindering precise alignment

Engineering Contradiction:

Improvespatial collision avoidanceVSAvoidalignment precision

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent transitions from oblique disposal in the horizontal plane to vertical stacking arrangement. The optical positioning element is positioned above the magnetic pole along the vertical dimension, allowing both components to occupy the same horizontal footprint without spatial collision while maintaining optimal optical alignment perpendicular to the element being tested.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

Instead of placing the optical positioning element to the side of the magnetic pole (horizontal arrangement), the patent inverts the spatial relationship by positioning the optical element above the magnetic pole (vertical arrangement), thereby eliminating angular parallax while avoiding spatial collision.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If the magnetic pole is moved away and then the optical positioning element is moved in for positioning, then spatial collision is avoided during positioning, but vibration is generated causing probe displacement and potential damage to fine electrodes

Engineering Contradiction:

Improvespatial collision avoidance during positioningVSAvoidvibration damage to electrodes

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent employs preliminary action by pre-positioning the optical positioning element above the magnetic pole in a non-interfering location before the magnetic pole is activated. This allows the optical element to be in place without requiring movement during magnetic field operation, thereby avoiding vibration-induced probe displacement and electrode damage.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The optical positioning element is nested within the magnetic pole assembly structure, positioned in the space above the magnetic pole. This nested arrangement allows both components to coexist without requiring separate positioning operations, eliminating vibration generation from element movement while maintaining spatial separation.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Device complexity

If the optical positioning element is disposed outside the magnetic pole structure, then spatial arrangement is simplified, but the light source can only be imported from a small space next to the probe, increasing spatial arrangement difficulty

Engineering Contradiction:

Improvespatial arrangement simplicityVSAvoidlight source import difficulty

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The patent resolves the light source import difficulty by utilizing the vertical dimension. The optical positioning element is positioned above the magnetic pole, allowing the light source to be introduced from the top side rather than requiring lateral import through constrained spaces next to the probe, thereby simplifying the overall spatial arrangement.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This configuration enables simultaneous strong magnetic field application and precise probe positioning, facilitating fast and accurate magnetic dynamic detection while minimizing the risk of electrode damage, maintaining a magnetic field strength comparable to structures without optical positioning elements.

Implementation Method 1

a magnetic field source for providing a magnetic field in the space

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Implementation Method 2

an optical positioning element disposed in one of the two magnetic poles for optically positioning the element to be tested

Methodology Applied

Scientific EffectOptical positioning: Optical Tweezers

Data Source

PatentUS11747301B2Magnetic field structure

Publication Date: 2023.09.05 IND TECH RES INST

AI summary

A magnetic field structure is provided and includes: two magnetic poles disposed in a magnetic circuit path and opposite to one another to form a space therebetween for receiving an element to be tested; a magnetic field source for providing a magnetic field in the space; and an optical positioning element disposed in one of the two magnetic poles for optically positioning the element to be tested. Therefore, the magnetic field structure can simultaneously provide a strong magnetic field and a precise positioning function.