Semiconductor Test System Pressure Matching
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Solution Overview
Problem
Current cryogenic environment test apparatuses for semiconductor devices require frequent changes in temperature and pressure to unload wafers and refill cooling sources, leading to delayed test times and frequent process interruptions.
Innovation Solution
A semiconductor test system comprising a transfer chamber, loadlock chambers, and test chambers configured to maintain consistent pressure and temperature during wafer transfer, allowing for continuous operation under cryogenic conditions by controlling the pressure and temperature of the transfer chamber to match the loadlock and test chambers, enabling efficient wafer handling and testing without disrupting the cryogenic environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the temperature and pressure of the cryogenic test apparatus are changed to unload wafers and refill cooling sources, then the apparatus can perform necessary maintenance and wafer handling operations, but the test time is delayed and the testing process is frequently interrupted
Solution Approach 1:
The system is divided into multiple independent test chambers (first test chamber, second test chamber) that can operate simultaneously. While one chamber undergoes temperature and pressure changes for wafer unloading or cooling source refilling, the other chamber continues testing without interruption. This segmentation allows maintenance operations to occur in parallel with ongoing tests, eliminating test time delays.
Solution Approach 2:
A transfer chamber serves as an intermediary between the loadlock chamber and test chambers. The transfer chamber receives wafers from the loadlock and transfers them to the test chambers without requiring the test chambers to change their temperature and pressure conditions. This intermediary structure enables wafer handling operations to occur in a separate environment, preventing interruptions to the cryogenic testing process.
2Quantity of substance
If the cooling source is consumed and the tank needs to be refilled or exchanged, then the cooling source can be replenished, but the temperature and pressure must be changed causing frequent process stoppages
Solution Approach 1:
The system employs multiple test chambers that can operate independently. When the cooling source in one chamber is consumed and needs refilling, the other chamber continues testing without interruption. This segmentation of the testing function across multiple chambers ensures that cooling source maintenance does not halt overall productivity.
Solution Approach 2:
The system monitors the cooling source level in advance and can prepare for refilling operations before the cooling source is completely consumed. By detecting the cooling source level and initiating refilling procedures proactively, the system minimizes the duration of any necessary interruptions and maintains continuous operation in parallel chambers.
3Adaptability or versatility
If the temperature and pressure are frequently changed for wafer handling and maintenance, then necessary operations can be performed, but the test efficiency and reliability are reduced
Solution Approach 1:
The transfer chamber acts as an intermediary that handles wafer transfer operations between the loadlock and test chambers. By performing wafer handling in the transfer chamber rather than directly in the test chamber, the system maintains the stable cryogenic environment required for reliable testing while still enabling versatile wafer handling operations.
Solution Approach 2:
The system separates wafer handling functions from testing functions by using distinct chambers. The loadlock chamber handles wafer loading, the transfer chamber handles wafer transfer, and the test chambers handle testing. This segmentation allows each chamber to maintain its optimal conditions independently, ensuring testing reliability while providing adaptable wafer handling capabilities.
Data Source
AI summary
A system for testing a semiconductor may include a transfer chamber, at least one loadlock chamber and at least one test chamber. The transfer chamber may include a plurality of sidewalls. The loadlock chamber may be arranged on a first sidewall of the sidewalls of the transfer chamber. The loadlock chamber may include a carrier configured to receive a plurality of wafers. The test chamber may be arranged on a second sidewall of the sidewalls of the transfer chamber. When the transfer chamber is connected to the loadlock chamber, a pressure of the transfer chamber may be changed into a pressure of the loadlock chamber. When the transfer chamber is connected to the test chamber, the pressure of the transfer chamber may be changed into a pressure of the test chamber.