Interchangeable Probe Insert for Semiconductor Testing
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Solution Overview
Problem
Existing probing systems for testing semiconductor devices face challenges in efficiently and cost-effectively adapting to different device configurations and maintaining mechanical stability and electrical connectivity during testing, particularly due to thermal gradients and mechanical loads.
Innovation Solution
A probe card assembly with an insert holder that allows for easy replacement and reconfiguration of probe inserts, featuring a stiffener plate for mechanical stability, an adjustment plate for planarity adjustment, and shielded signal traces for improved connectivity and frequency performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed probe card assembly is used, then mechanical stability is maintained, but adaptability to different device configurations is poor
Solution Approach 1:
The probe card assembly is divided into separate modular components: a reusable probe card body and interchangeable probe inserts. Each probe insert contains a specific arrangement of probes tailored to different device configurations. This segmentation allows the system to adapt to various devices by simply swapping inserts rather than redesigning the entire probe card, thereby improving adaptability while keeping the overall system complexity manageable through standardization.
Solution Approach 2:
The probe card body is designed as a universal platform that can accommodate multiple different probe inserts. The insert holder and electrical connection mechanisms are standardized to work with various insert types and configurations. This multi-functionality enables a single probe card assembly to serve multiple testing purposes across different semiconductor devices, improving versatility without requiring multiple specialized probe cards.
2Adaptability or versatility
If probe inserts are frequently replaced, then adaptability improves, but mechanical stability and electrical connectivity may deteriorate
Solution Approach 1:
The probe insert is designed to nest within the probe card body, with the insert holder providing a secure receiving structure. The electrical connections are arranged such that probe contacts on the insert engage with corresponding receptacles in the card body, creating a nested connection system. This nested design ensures that frequent insertion and removal operations do not compromise the integrity of the electrical pathways, as each connection point is specifically designed to accommodate repeated mating and unmating cycles.
Solution Approach 2:
The probe inserts are pre-configured with specific probe arrangements and electrical connection patterns matched to particular device types. The insert holder includes pre-positioned electrical receptacles that align with the probe contacts. This preliminary configuration ensures that when an insert is installed, proper electrical connectivity is immediately established without requiring additional adjustment or calibration, maintaining reliability even with frequent replacements.
3Ease of manufacture
If a standardized probe card assembly is used, then manufacturing cost is reduced, but adaptability to different testing requirements is limited
Solution Approach 1:
The system segments the probe card into a standardized body and customizable inserts. The body can be manufactured once using standardized processes, achieving economies of scale. Different probe inserts can then be manufactured separately with specific probe patterns and electrical configurations tailored to different testing requirements. This segmentation allows the manufacturing benefits of standardization to be combined with the flexibility of customization, as each insert can be produced independently using the same standardized manufacturing processes.
Solution Approach 2:
The probe inserts allow for parameter changes in probe arrangement, spacing, and electrical connection patterns without changing the fundamental probe card assembly structure. By varying the parameters of the interchangeable inserts rather than redesigning the entire assembly, the system achieves manufacturing efficiency through standardized base components while providing adaptability through parameter variations in the inserts to meet different testing requirements.
Data Source
AI summary
A probe card assembly can include an insert holder configured to hold a probe insert, which can include probes disposed in a particular configuration for probing a device to be tested. The probe card assembly can provide an electrical interface to a tester that can control testing of the device, and while attached to the probe card assembly, the insert holder can hold the probe insert such that the probe insert is electrically connected to electrical paths within the probe card assembly that are part of the interface to the tester. The insert holder can be detached from the probe card assembly. The probe insert of the probe card assembly can be replaced by detaching the insert holder, replacing the probe insert with a new probe insert, and then reattaching the insert holder to the probe card assembly. The probe insert and holder can be integrally formed and comprise a single structure that can be detached from a probe card assembly and replaced with a different probe insert and holder.