Fine-Pitch Probe Pin Shielding for Isolation and Debris Control

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Solution Overview

Problem

Existing probe technologies face issues with probe pin shorting and debris accumulation during wafer testing, leading to damage and difficulty in cleaning, especially at fine-pitch scales.

Innovation Solution

A probe assembly incorporating non-conductive elastic materials and structures to provide electrical isolation between probe pins, preventing debris ingress and facilitating easier cleaning, compatible with existing and new probe technologies.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If probe pins are arranged in fine-pitch grouping for high-density testing, then testing capability and productivity are improved, but electrical isolation between pins becomes insufficient leading to shorting

Engineering Contradiction:

Improvetesting capabilityVSAvoidelectrical isolation

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

A flexible insulating material is placed between the probe pins to provide electrical isolation. The material conforms to the fine-pitch arrangement of pins while maintaining sufficient isolation distance, preventing shorting between adjacent pins in high-density configurations

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

An insulating material acts as an intermediary substance between the conductive probe pins, physically separating them and preventing electrical contact. This mediator maintains the close spacing needed for high productivity while ensuring reliable electrical isolation

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If probe pins are placed in close proximity for fine-pitch applications, then device density and productivity increase, but debris accumulation between pins increases causing shorting and damage

Engineering Contradiction:

Improvedevice densityVSAvoiddebris accumulation

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The flexible insulating material forms a physical barrier between probe pins, preventing debris from settling in the gaps between pins. The material's flexibility allows it to conform to the pin arrangement while maintaining a protective barrier that eliminates debris accumulation zones

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The insulating material, while primarily intended for electrical isolation, inadvertently provides a secondary benefit by preventing debris accumulation. The same structure that solves the shorting problem also eliminates the habitat for contaminants

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Productivity

If probe pins are arranged in fine-pitch configurations, then testing efficiency is improved, but cleaning difficulty increases due to debris lodged between pins

Engineering Contradiction:

Improvetesting efficiencyVSAvoidcleaning difficulty

Core Design Contradiction:

ProductivityVSEase of repair

Solution Approach 1:

The flexible insulating material creates a smooth surface that prevents debris from becoming lodged between pins. The continuous material barrier eliminates the crevices and gaps where contaminants would otherwise accumulate, making the probe assembly easy to clean and maintain

Inventive Principle:

Principle #30Flexible shells and thin films

4Reliability

If electrical isolation between probe pins is enhanced to prevent shorting, then reliability is improved, but device complexity increases

Engineering Contradiction:

Improveshorting preventionVSAvoidisolation structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

A single flexible insulating material provides comprehensive electrical isolation between all probe pins simultaneously. This simple, unified approach achieves reliable isolation without requiring complex multi-component structures or intricate isolation mechanisms for each pin pair

Inventive Principle:

Principle #30Flexible shells and thin films

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

The solution effectively prevents shorting and debris accumulation, minimizing cleaning needs and ensuring reliable electrical testing by maintaining probe pin integrity and functionality.

Implementation Method 1

non-conductive elastic material introduced into and cured within an interior region defined by the mold to surround at least the elongate element of each probe pin

Methodology Applied

Scientific EffectElectrical insulation: Electrical Resistance

Implementation Method 2

introducing a non-conductive elastic material in a semi-fluidic state into an interior region defined by the mold and processing the non-conductive elastic material into a solidified state within the interior region

Methodology Applied

Scientific EffectCuring: Phase Change

Data Source

PatentUS20260063666A1Fine-pitch probing shield

Publication Date: 2026.03.05 INTERNATIONAL BUSINESS MACHINE CORPORATION

AI summary

A probe assembly is provided and includes a probe card, an interposer body disposed on a surface of the probe card, probe pins arranged in a grouping and extending from the interposer body away from the probe card, each probe pin including an elongate element and a tip at a distal end of the elongate element, a mold supportable on the interposer body to fit around the grouping of the probe pins and non-conductive elastic material introduced into and cured within an interior region defined by the mold to surround at least the elongate element of each probe pin.