In the semiconductor chip manufacturing process, the cleaning procedure implemented immediately before the packaging stage constitutes a critical operational requirement. Throughout the comprehensive manufacturing workflow that precedes the final packaging phase, various types of contaminants accumulate on the chip surface. These residual materials include photoresist compounds that remain from lithography processes, dissolved metal ions generated during etching and deposition operations, particulate matter from processing equipment, and organic residues from intermediate chemical treatments. The presence of these substances on the chip substrate creates significant technical challenges for downstream operations.
Photoresist represents a critical material component within the semiconductor manufacturing process, particularly during the chip lithography phase where precise pattern transfer takes place. Following completion of the pattern transfer process, any residual photoresist material remaining on the chip surface must be thoroughly and completely removed to prevent subsequent interference with the electrical connections between the chip and its protective packaging. This removal step is essential for maintaining the integrity of the entire semiconductor assembly. The presence of metallic ion contaminants, including sodium ions and copper ions among others, poses significant risks to chip performance and reliability. These metallic species have the potential to interfere with the electrical properties of the semiconductor device, potentially causing current leakage pathways and in severe cases may lead to complete chip failure or malfunction. Beyond metallic ion contamination, particulate contaminants such as microscopic dust particles, organic residues from processing chemicals, and other foreign matter present additional challenges during the semiconductor manufacturing workflow.
