Light-Absorption Cantilever Probe for Precise Pinpoint Detection

Solution Overview

Problem

Conventional cantilever probe cards face misjudgment issues due to structural design, causing detection apparatuses to inaccurately identify the pinpoint portion of cantilever probes.

Innovation Solution

The introduction of a light absorption coating layer on the upright portion of cantilever probes, allowing the detection apparatus to precisely locate the pinpoint portion by forming an observation point only at this area, while the soldering end portions are fixed onto substrate soldering pads.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a conventional cantilever probe structure is used, then the probe can be manufactured with standard processes, but the detection apparatus cannot precisely identify the pinpoint portion due to adjacent portions causing misjudgment

Engineering Contradiction:

Improveposition identification accuracyVSAvoidprobe structure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies local quality by coating only the upright portion of the cantilever probe with light absorption material, while leaving the pinpoint portion uncoated. This creates a local distinction in optical properties that enables the detection apparatus to precisely identify the pinpoint portion through optical contrast, resolving the measurement precision issue without requiring complex structural modifications to the entire probe.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent utilizes color/optical property changes by applying a light absorption coating to the upright portion. This creates a visual contrast between the coated upright portion and the uncoated pinpoint portion, allowing the detection apparatus to distinguish the pinpoint location through optical detection, thereby improving position identification accuracy.

Inventive Principle:

Principle #32Color changes

2Measurement precision

If the entire cantilever probe is coated with light absorption material, then the observation point can be clearly identified, but the pinpoint portion cannot be precisely located due to complete coverage

Engineering Contradiction:

Improvepinpoint position accuracyVSAvoidpinpoint location information

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent applies local quality by coating only the upright portion of the cantilever probe with light absorption material, while leaving the pinpoint portion uncoated. This creates a local distinction in optical properties that enables the detection apparatus to precisely identify the pinpoint portion through optical contrast, resolving the measurement precision issue without requiring complex structural modifications to the entire probe.

Inventive Principle:

Principle #3Local quality

3Measurement precision

If additional structural features are added to the cantilever probe to improve detection accuracy, then position identification can be enhanced, but the manufacturing process becomes more complex

Engineering Contradiction:

Improveobservation point accuracyVSAvoidprobe fabrication ease

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent applies local quality by coating only the upright portion of the cantilever probe with light absorption material, while leaving the pinpoint portion uncoated. This creates a local distinction in optical properties that enables the detection apparatus to precisely identify the pinpoint portion through optical contrast, resolving the measurement precision issue without requiring complex structural modifications to the entire probe.

Inventive Principle:

Principle #3Local quality

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

Enables precise positioning of the pinpoint portion, enhancing the accuracy of detection apparatus operations by focusing observation on the coated region, thus improving the functionality of cantilever probe cards.

Implementation Method 1

a light absorption coating layer... Through the light absorption coating layer, the testing segment only forms an observation point at the pinpoint portion

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentUS12467949B2Cantilever probe card device and light absorption probe

Publication Date: 2025.11.11 CHUNGHWA PRECISION TEST TECH

AI summary

A light absorption probe includes an arm segment, a main segment located at one side of the arm segment, a testing segment connected to another side of the arm segment, and a light absorption coating layer. The main segment has a soldering end portion and an extending end portion respectively located at two opposite sides thereof along a predetermined direction. The testing segment has an upright shape along the predetermined direction and includes a pinpoint portion and an upright portion that connects the pinpoint portion and the arm segment. The light absorption coating layer covers the upright portion, and the pinpoint portion is exposed from the light absorption coating layer. Through the light absorption coating layer, the testing segment only forms an observation point at the pinpoint portion in an observation process of a detection apparatus.