Wafer Separation Tank Layout for Ingot Block Isolation

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Solution Overview

Problem

Existing wafer separation methods fail to distinguish and separate wafers from different ingot blocks with varying properties, leading to their storage in the same cassette, which can result in mixing of wafers with different characteristics.

Innovation Solution

A wafer separation device and method utilizing a water tank with barrier ribs to isolate ingot blocks, a heating mechanism to weaken adhesive bonds, and a sensor to detect the presence of barrier ribs, ensuring wafers with different properties are stored in separate cassettes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple ingot blocks are placed in one water tank to increase processing capacity, then productivity is improved, but the ability to distinguish and separate wafers from different ingot blocks deteriorates

Engineering Contradiction:

Improveprocessing capacityVSAvoiddistinguishability of wafers from different ingot blocks

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The water tank is divided into multiple isolation regions using barrier ribs, with each region accommodating a specific ingot block. This segmentation allows multiple ingot blocks to be processed simultaneously while maintaining clear distinction between wafers from different blocks, thus resolving the contradiction between increased productivity and preserved distinguishability.

Inventive Principle:

Principle #1Segmentation

2Reliability

If ingot blocks are isolated in separate cassettes to maintain property distinction, then wafer property tracking is improved, but device complexity increases

Engineering Contradiction:

Improvewafer property trackingVSAvoidnumber of cassettes and isolation structures

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Barrier ribs serve as intermediary structures that create visual and physical separation between ingot blocks within a single water tank. These ribs enable property tracking and distinction without requiring separate cassettes for each ingot block, thus maintaining reliability while minimizing device complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Effectively separates and stores wafers from different ingot blocks in distinct cassettes, preventing mixing of wafers with varying properties.

Implementation Method 1

a heating member configured to heat the liquid

Methodology Applied

Scientific EffectHeating: Heating

Data Source

PatentUS12533873B2Device and method for separating wafers

Publication Date: 2026.01.27 SK SILTRON CO LTD

AI summary

Disclosed is a device for separating wafers sheet by sheet from ingot blocks having a plurality of sliced wafers bonded thereto. The wafer separation device includes a water tank configured to receive the ingot blocks and a liquid, a heating member configured to heat the liquid, a barrier rib provided in the water tank to isolate the ingot blocks from each other, an arm configured to separate the wafers sheet by sheet from the ingot blocks, and a sensor configured to sense the barrier rib.