Ultrathin silicon wafer defect detection method based on IR micro-digital holography

Area of Science:

• Materials Science
• Optical Engineering
• Semiconductor Manufacturing

Background:

• Ultrathin silicon wafers are critical for wearable and flexible electronics.
• Defects in these wafers significantly degrade electronic performance.
• Current detection methods lack the required precision, speed, and non-destructive capabilities.

Purpose of the Study:

• To introduce a novel, high-precision, non-destructive method for detecting defects in ultrathin silicon wafers.
• To leverage infrared (IR) micro-digital holography for enhanced defect analysis.
• To address the urgent need for rapid and accurate damage assessment in silicon wafer preparation.

Main Methods:

• Development and application of an IR micro-digital holography technique.
• Utilizing the insensitivity of IR light to visible light and environmental interference.
• Employing micro-holography for scalable micro-target imaging.

Main Results:

• Successful implementation of IR micro-digital holography for defect detection in ultrathin silicon wafers.
• Achieved detection accuracy at the submicron level.
• Demonstrated a non-destructive and rapid assessment capability.

Conclusions:

• IR micro-digital holography is a pioneering and effective method for ultrathin silicon wafer defect detection.
• The technique offers submicron precision, addressing a critical need in semiconductor manufacturing.
• This advancement supports the production of higher-performance flexible and wearable electronic devices.