Will Semiconductor has been granted a patent for an image sensor module with a unique dam structure. The method involves using a dry film with a sawtooth pattern exposed to UV light to create the dam. This innovation aims to improve image sensor performance. GlobalData’s report on Will Semiconductor gives a 360-degree view of the company including its patenting strategy. Buy the report here.

According to GlobalData’s company profile on Will Semiconductor, Under-screen biometric identification was a key innovation area identified from patents. Will Semiconductor's grant share as of April 2024 was 74%. Grant share is based on the ratio of number of grants to total number of patents.

Image sensor module with sawtooth pattern dam formation

Source: United States Patent and Trademark Office (USPTO). Credit: Will Semiconductor Co Ltd

A recently granted patent (Publication Number: US11973098B2) discloses a method for forming a dam of an image sensor module. The method involves laminating a cover glass using a dry film, aligning an exposure mask with a sawtooth pattern to the dry film, exposing it to ultraviolet light, developing the exposed dry film in a photo lithographic process, and curing it to form a dam attached to the cover glass. Additional steps include plasma cleaning the cover glass, flipping over the cover glass to attach the dam to an image sensor, and applying adhesive for mounting the dam to the image sensor.

Furthermore, the method includes specific details such as the formation of a sawtooth pattern on the inner wall of the dam parallel to the cover glass surface, the creation of an overflow during heating resulting in inclined, wider-narrower, or curved surfaces on the dam, and the use of a glass wafer as the cover glass. These precise steps and configurations aim to enhance the functionality and performance of the image sensor module, particularly in protecting the light sensing area with a well-formed dam structure. The patent highlights the innovative approach to manufacturing image sensor modules with improved dam formation techniques, potentially leading to advancements in image sensor technology.

To know more about GlobalData’s detailed insights on Will Semiconductor, buy the report here.

Premium Insights


The gold standard of business intelligence.

Blending expert knowledge with cutting-edge technology, GlobalData’s unrivalled proprietary data will enable you to decode what’s happening in your market. You can make better informed decisions and gain a future-proof advantage over your competitors.


GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.