โ Scribed by D. Daniel Sheu
No coin nor oath required. For personal study only.
The ability to mark and read product identifications for tracking the flexible circuits in production lines is critical for a major inkjet pen manufacturer. The investigation showed that commercially available marking machines were not acceptable due to contamination, physical damage, and readability issues. This paper describes the development of a new laserbased integrated marking system and its development methodology. Failure modes effect analysis (FMEA) was used to identify and prioritize potential risks that led to output parameters for subsequent design of experiments (DOE). The input parameters were optimized for a small number of key output parameters. Qualification processes were then used to make sure that all risks were within acceptable ranges. An integrated marker was built to automatically differentiate flex types, enabling a foolproof marking. The key success factors and the three stages of implementation for the project were noted. The readability was 99.9% for the identification marks at the first manufacturing release. The system enabled product tracking and faster manufacturing problem diagnoses.
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## Abstract Various plastic films of a melting point above 170ยฐC were selected for IC package in laser marking. These films include: (1) polyacetal, (2) polycarbonate, (3) polyester, and (4) nylon. They are in a form of a homogeneous layer, polymer blend, or multilayer structure. The plastic films