Probe Card Connector Structure for Rapid Interchange
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Solution Overview
Problem
The semiconductor industry faces inefficiencies in wafer testing due to the need to stop test equipment to replace probe cards, which leads to increased downtime and potential changes in mechanical and electrical fit, affecting testing accuracy and efficiency.
Innovation Solution
A probe apparatus with a connector structure that allows for easy replacement and interchange of probe cards, featuring a wire guide, probe tile, and connector structure with a retainer member, enabling continuous testing without stopping the equipment and ensuring accurate alignment and contact with the circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If probe cards are replaced manually when they wear out, then the probe cards can be replaced with new ones, but the test equipment must be stopped and downtime increases
Solution Approach 1:
The system is divided into modular components: a stationary holder that remains in the test equipment and replaceable probe cards that can be quickly swapped. This segmentation allows the probe card to be replaced without removing or stopping the entire test equipment, thus reducing downtime while maintaining reliability.
Solution Approach 2:
Multiple probe cards are pre-loaded onto the holder in advance. When one probe card wears out, a replacement is already in position and can be quickly activated without requiring equipment shutdown or complex replacement procedures, thereby minimizing equipment downtime.
2Reliability
If probe cards are replaced frequently, then worn out probes are replaced, but the mechanical fit of the wafer/probe card/prober/test head system changes resulting in different electrical results
Solution Approach 1:
The holder is designed as a permanent stationary component that maintains consistent mechanical positioning within the test equipment. Only the probe cards are replaced, not the entire assembly. This ensures that the mechanical fit and alignment relationships between the holder, prober, and test head remain constant, eliminating variability in electrical results while still allowing frequent probe card replacement.
Solution Approach 2:
Multiple identical or interchangeable probe cards are used, each capable of performing the same testing function. These cards are pre-configured on the holder with consistent positioning, ensuring that any card in the sequence maintains the same mechanical and electrical characteristics, thus eliminating fit variability.
3Duration of action of stationary object
If probe cards are made more durable, then they can be used longer, but the cost of the probe card and holder system increases
Solution Approach 1:
The system separates the durable stationary holder from the consumable probe cards. The holder, which requires high mechanical durability and precision, is built once and remains in place. The probe cards, which wear out, are replaced periodically. This segmentation allows the expensive durable components to be amortized over many card replacements, reducing the effective cost per use compared to making entire assemblies more durable.
Solution Approach 2:
The probe cards are designed as disposable or limited-life components that are replaced when worn, while the expensive holder and connector structures are built to last. This approach is more economical than making the entire system durable, as it replaces only the worn consumable parts while retaining the investment in the durable holder infrastructure.
Data Source
AI summary
A probe apparatus has probe wires with a contact pattern on one side. The contact pattern is for contacting a respective contact pattern on another test equipment or component, such as a circuit board. The probe wires have tips that probe a device desired for testing. Signals are transmitted through the probe wires from the probe card, for example, through a circuit board to other diagnostic equipment. The contact of the probe card with the circuit board allows signals to be transferred through the probe wires to the other diagnostic equipment. On another side of the probe card is a connector structure. The connector structure includes a retainer that can allow the probe card to be replaced from a test system, such as allowing it to be connected and disconnected from a holder.