Acid Texturing

Product catalog summary

Overview: The Acid Texturing Inline System by SCHMID is designed for efficient texturing of multi-crystalline wafers, optimizing chemistry and water usage while maintaining a low breakage rate and high throughput. The system is adaptable to various wafer sizes and features automatic process control for stable production.

Key Features:

Gentle wafer handling to prevent transport damage.
Automatic dosing and bath monitoring for process control.
Continuous chemical circulation for reproducibility.
Low consumption of water and chemicals.
High operating safety with safety installations and an efficient exhaust system.
Easy access for service and maintenance.

Process Description: Acid texturing is used on multi-crystalline wafers to remove impurities and damages from the sawing process while enlarging the wafer surface. This isotropic surface texture reduces reflection, enhancing cell efficiency.

System Advantages:

Perfect surface quality achieved through SCHMID's extensive experience in wet processing.
Frequency-controlled pumps ensure uniform texturing across the working width.
Automatic dosing and bath monitoring provide full process control.
Digital recording and visualization of measured values via the SCHMID Watch operating unit.
Optional reflection measuring device for reproducibility confirmation.

Technical Specifications:

Throughput: 3,600 wafers/h (5 tracks), 7,200 wafers/h (10 tracks), with further configurations available.
Wafer size: 156 – 161.7 mm.
Breakage rate: < 0.1%.
Process media: HNO3, HF, KOH, HCL.
Automation: Optional loader and unloader available.

Additional Features: The system includes a sophisticated conveyor system to minimize wafer breakage and new squeegee rollers to reduce drag-out. The multiple cascade technology minimizes DI water consumption, and vapors are efficiently extracted through the exhaust system. The modular design allows for customization of throughput and process steps to meet customer needs.

Catalog excerpts

Acid Texturing Perfect wafer surfaces at the lowest process costs The Acid Texturing Inline System of SCHMID ensures the most efficient texturing of multi-crystalline wafers. Minimum chemistry and water consumption, a low breakage rate, high throughput and a smooth-action conveying system suitable for all common wafer sizes ensure stable production. The automatic process control and the easy access are unique.

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ACID TEXTURING Details Technical Data Acid texturing is applied with multi-crystalline wafers. In this process, the impurities and damages incurred in the sawing process are removed. At the same time the surface of the wafer is enlarged. The isotropic surface texture reduces the reflection and thus decisively influences the cell efficiency. Throughput:  3,600 wafers/h (5 tracks)  7,200 wafers/h (10 tracks)  Further throughputs configurable  Gentle wafer handling without transport damage  Process control by automatic dosing and bath monitoring  Continuous circulation of chemistry for maximum...

Open the catalog to page 2

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