Transparent Wafer Drying Hood for Real-Time Drying Inspection
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Solution Overview
Problem
Existing drying processes for semiconductor wafers result in inconsistent or incomplete drying, leading to non-dried areas and requiring additional inspection and cleaning steps, which cause time and quality losses in the manufacturing process.
Innovation Solution
A drying device with a transparent pane element in the drying hood unit allows real-time visual inspection during the drying process, enabling immediate correction of process parameters to ensure complete drying without removing the wafer from the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional opaque drying hood unit is used, then the drying process can be enclosed and controlled, but the operator cannot visually inspect the drying progress in real-time, leading to undetected non-dried areas and requiring additional inspection steps
Solution Approach 1:
The patent applies transparency (optical property) changes to the drying hood unit by replacing opaque materials with transparent panes, allowing visual inspection of the drying process without compromising the enclosed drying environment. This enables real-time observation of drying quality while maintaining process control.
2Ease of operation
If the drying device is opened to inspect and readjust parameters, then the operator can directly observe and correct drying issues, but the drying parameters no longer correspond to closed system conditions, requiring multiple attempts to achieve desired results
Solution Approach 1:
The transparent panes enable visual monitoring without opening the drying device, allowing operators to assess drying quality while the system remains in its closed, controlled state. This eliminates the need to open the device for inspection, maintaining parameter stability and avoiding multiple adjustment attempts.
3Measurement precision
If additional inspection stations are provided downstream, then drying quality can be assessed, but particles may be deposited on wafer surfaces during handling, requiring further cleaning steps that increase manufacturing time
Solution Approach 1:
The transparent drying hood unit enables preliminary visual inspection of drying quality while the wafer remains in the drying device, before any handling or transfer operations. This allows operators to detect and correct drying issues immediately, preventing the need for downstream inspection stations and associated handling that could deposit particles or require additional cleaning steps.
4Reliability
If the drying process is extended to ensure complete drying, then non-dried areas are eliminated, but the manufacturing time increases
Solution Approach 1:
The transparent panes provide real-time visual feedback on drying progress and quality, allowing operators to monitor whether complete drying is being achieved and make immediate adjustments to process parameters or duration. This feedback mechanism enables optimization of drying time to achieve complete coverage without unnecessary extension that would increase manufacturing time.
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
Facilitates immediate detection and correction of non-dried areas, reducing manufacturing time and quality losses by allowing continuous process control under real conditions.
Implementation Method 1
provides a substantially unrestricted optical view of substantially the entire surface of the arranged semiconductor wafer
Implementation Method 2
drying usually takes place within a drying device arranged at the end of a cleaning line
Data Source
Figure 1
AI summary
The invention relates to a drying device which is designed to dry at least one wetted semiconductor wafer (200) temporarily arranged therein on a carrier unit (10) during at least one drying process, wherein the drying device (100) comprises a drying hood unit (110). The drying hood unit (110) comprises at least one transparent pane element (111, 112, 113), which is designed and arranged on the drying hood unit (110) in such a way that, when the drying hood unit (110) is closed, it provides a substantially unrestricted optical view of substantially the entire surface of the arranged semiconductor wafer (200), in particular for at least one operator, as viewed from outside the drying device (100) via the at least one transparent pane element (111, 112, 113, throughout the entire at least one drying process.