Kathleen G Purdy

Title: Kathleen G. Purdy: Innovator in Photomask Inspection and Yield Expectation

Introduction

Kathleen G. Purdy is a distinguished inventor based in Richmond, Vermont, known for her significant contributions to the field of integrated circuit manufacturing. With a total of 3 patents, she has developed innovative methods that enhance the efficiency and accuracy of photomask inspection processes.

Latest Patents

One of her latest patents is focused on photomask image inspection. This method optimizes the inspection of photomasks by predicting the likelihood of defect-free masks based on various criteria, including defect criteria, etch area, etch mode, and etch tool type. The method allows for skipping initial inspections for masks with a high predictability value, while performing inspections for those with lower values. After the initial inspection, a pellicle is mounted on the mask, followed by a thorough inspection for defects and foreign matter.

Another notable patent involves dynamically determining yield expectations during the manufacturing of integrated circuits. This process begins with establishing an initial yield expectation based on process grades and adjusts it in real-time using test data from the kerf of a wafer. The yield expectation is further refined using inspection data from optical and SEM tools, resulting in more accurate projections during manufacturing.

Career Highlights

Kathleen is currently employed at International Business Machines Corporation (IBM), where she continues to innovate and contribute to advancements in technology. Her work has had a profound impact on the manufacturing processes of integrated circuits, making them more reliable and efficient.

Collaborations

Throughout her career, Kathleen has collaborated with notable colleagues, including Tange Nan Barbour and Thomas S. Barnett. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.

Conclusion

Kathleen G. Purdy is a remarkable inventor whose work in photomask inspection and yield expectation determination has significantly advanced the field of integrated circuit manufacturing. Her contributions continue to influence the industry, showcasing the importance of innovation in technology.