Portable Probe Card Assembly for Semiconductor Testing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The semiconductor industry faces challenges in effectively testing semiconductor devices on wafers due to the need for precise electrical measurements over a wide temperature and voltage range, while minimizing external interference and handling increasingly smaller devices with smaller contact pads.
Innovation Solution
A portable test assembly with a base plate, top plate, and probe card that provides motion control in X, Y, Z, and rotational directions, using adjustable rigid stops and tapered pins for precise positioning, along with a cleaning plate with tungsten carbide for debris removal, allowing for atypical testing environments like extreme temperatures or radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional probe and interconnection components are used, then electrical measurements can be obtained, but external electrical interference, leakage currents, parasitic capacitance, and noise degrade measurement precision
Solution Approach 1:
The patent introduces an intermediary probe card assembly with a specialized interconnection structure that acts as a mediator between the probe and test instrument. This intermediary incorporates shielding elements and optimized signal paths that filter out external electrical interference, leakage currents, and parasitic capacitance before they reach the measurement circuitry, thereby improving measurement precision without sacrificing signal integrity
Solution Approach 2:
The patent creates an electrically inert environment through shielding structures and grounding schemes that isolate the measurement signal from external electrical interference. The probe card assembly incorporates conductive shielding layers and reference grounds that form a protected electromagnetic environment, effectively blocking triboelectric noise, piezoelectric noise, and other electrical disturbances
2Measurement precision
If probes and interconnection components are designed to isolate measurement signals, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent designs the probe card assembly to perform multiple functions within a single integrated structure. The interconnection components simultaneously provide electrical connection, signal shielding, mechanical support, and thermal management functions. This multi-functionality reduces the need for separate isolation components, thereby improving measurement precision while controlling overall device complexity
Solution Approach 2:
The patent merges previously separate functions into integrated components. The probe card assembly combines the probe holder, interconnection traces, shielding layers, and grounding structures into a unified structure. This integration eliminates the need for multiple separate isolation components, reducing overall system complexity while maintaining signal isolation capabilities
3Productivity
If semiconductor devices become smaller with smaller contact pads, then device integration increases, but probing difficulty and measurement precision deteriorate
Solution Approach 1:
The patent applies local quality by designing probes with specialized tip geometries and materials optimized for small contact pads. The probe tips feature localized high-curvature contact surfaces with precise positioning features that concentrate force and improve alignment accuracy. The interconnection components also incorporate localized shielding and signal routing optimized for high-frequency, low-signal applications typical of small-scale devices
4Adaptability or versatility
If testing is performed over wide temperature and voltage ranges, then device characterization improves, but measurement stability and precision worsen due to environmental interference
Solution Approach 1:
The patent incorporates compensation mechanisms that detect and correct for parameter changes in the testing environment. Temperature sensors and reference measurements are integrated into the probe card assembly to detect environmental drift. The system dynamically adjusts measurement parameters and applies correction algorithms to maintain precision across wide temperature and voltage ranges, effectively decoupling environmental variability from measurement accuracy
Data Source
AI summary
This disclosure relates generally to test equipment, apparatuses, and systems for a device under test, such as, but not limited to, a semiconductor device. More specifically, this disclosure relates to test equipment, apparatuses, and systems that are portable for use in atypical testing environments.