Semiconductors & Foundry Operations

How to Record Dummy Wafer Consumption

Accounting for non-product wafers used for equipment stabilization and process monitoring in the fab.

Account NameTypeDebit ($)Credit ($)
Manufacturing Overhead - ConsumablesDebit12,500.00-
Dummy Wafer InventoryCredit-12,500.00

💡 Accountant's Note

Dummy wafers are used to maintain thermal equilibrium or protect tool surfaces and are expensed as consumed since they do not become part of the finished product.

Practitioner & Systems Framework

💻 ERP Architecture

Set up dummy wafers as non-valuated materials in the BOM or track via supply chain module for automatic expense on issue.

⚠️ Audit Flags

Significant variances between physical counts of dummy wafers and inventory records.

📄 Required Documentation

Material requisition forms and equipment usage logs indicating dummy wafer counts.

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Expert Analysis by Qusai Ahmad

General Accountant Supervisor & IFRS Specialist

Specialized in SAP GUI automation and Middle Eastern tax compliance. Building digital tools for the next generation of finance leaders.

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