Wafer Probe Layout With Environmental Buffer Transfer

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The semiconductor manufacturing process faces challenges with multiple probe apparatuses occupying large space and requiring time-consuming wafer transfers between different testing conditions, leading to inefficiencies in productivity and testing accuracy.

Innovation Solution

A multi-stage probe system with staggered or parallel arrangements of probe apparatuses, integrated temperature and humidity buffers, and a novel transfer system that allows for simultaneous testing under varying conditions, reducing footprint and transfer cycle time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple probe apparatuses are used for testing under different conditions, then testing versatility is improved, but system footprint increases

Engineering Contradiction:

Improvetesting versatilityVSAvoidsystem footprint

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent combines multiple probe apparatuses into a single integrated system with a shared transfer rail and robot arm. Multiple probe chambers are arranged along the transfer rail, allowing wafers to be transferred between different testing environments without requiring separate standalone apparatuses for each test condition.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The transfer rail and robot arm serve multiple functions: they transport wafers between different probe chambers, manage wafer loading/unloading, and coordinate transfers to environmental buffers. This multi-functional design eliminates the need for dedicated transfer mechanisms at each probe station, reducing overall system footprint.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple probe apparatuses are used for different testing conditions, then testing versatility is improved, but transfer cycle time increases

Engineering Contradiction:

Improvetesting versatilityVSAvoidtransfer cycle time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The system enables continuous wafer processing by allowing multiple wafers to be tested simultaneously in different probe chambers. While one wafer is being tested in a probe chamber, another wafer can be loaded or transferred in a different chamber, eliminating idle time and maintaining continuous productive action throughout the system.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The robot arm and transfer rail provide dynamic, flexible wafer routing that can adapt to different testing sequences and conditions. The system can optimize transfer paths and timing based on which tests are currently active in each chamber, reducing unnecessary wait times and improving overall throughput.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If wafers are transferred between multiple probe apparatuses, then comprehensive testing is improved, but testing accuracy deteriorates due to environmental changes

Engineering Contradiction:

Improvecomprehensive testingVSAvoidtesting accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

Environmental buffers serve as intermediary chambers between the probe chambers and the external environment. These buffers maintain controlled temperature and humidity conditions, acting as a transition zone that protects wafers from sudden environmental changes during transfer, thereby preserving testing accuracy.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system prepares wafers in advance for transfer by placing them in environmental buffers that maintain stable conditions before and after testing. This beforehand cushioning prevents thermal shock and moisture contamination that would otherwise occur during direct exposure to ambient conditions, ensuring measurement precision is maintained throughout the testing process.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 system reduces the test system footprint by up to 13% and significantly decreases transfer cycle time, improving productivity and enhancing testing accuracy by maintaining consistent environmental conditions during wafer transfers.

Implementation Method 1

cooling the wafer in the environmental buffer

Methodology Applied

Scientific EffectHeat removal: Cooling

Implementation Method 2

The dehumidification of the wafer prevents dew from forming on the wafer

Methodology Applied

Scientific EffectDehumidification: Evaporation

Data Source

PatentUS20250347737A1Wafer test system and methods

Publication Date: 2025.11.13 TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD

AI summary

A method includes: positioning a wafer in a first probe chamber of a first probe apparatus by a robot arm, the first probe apparatus being adjacent a transfer rail, the robot arm, in operation, moving along the transfer rail; testing the wafer by the first probe apparatus; following the testing, transferring the wafer to an environmental buffer attached to the first probe chamber; cooling the wafer in the environmental buffer; and following the cooling, transferring the wafer from the environmental buffer to a second probe chamber of a second probe apparatus by the robot arm, the second probe apparatus being adjacent the transfer rail and offset from the first probe apparatus.