Industry-Specific Recommendations
Medical Devices
Recommended: Laser marking. FDA Unique Device Identification (UDI) requirements demand permanent, high-contrast, machine-readable marks. Dot peen marks create crevices that can harbor bacteria. Inkjet marks fade with sterilization cycles. Laser annealing is the industry standard.
Aerospace
Recommended: Laser or dot peen. Aerospace standard AS9132 specifically addresses dot peen marking for part traceability, and both laser and dot peen are accepted. Laser is preferred for fine DataMatrix codes; dot peen for deep marks on large structural components.
Automotive
Recommended: Laser for most applications; dot peen for VIN. Laser marking handles most part identification needs. Dot peen remains the standard for VIN plates due to regulatory requirements and the need for deep, tamper-resistant marks.
Electronics
Recommended: Laser marking. The precision requirements for PCB marking, component identification, and miniaturized 2D codes are beyond dot peen’s capability. Inkjet lacks permanence. Laser is the only viable option.
Oil & Gas / Heavy Industry
Recommended: Dot peen or laser. For pipeline components and heavy equipment exposed to extreme conditions, dot peen’s deep indentation marks survive where surface-level laser marks might wear. For smaller, precision-marked components, laser is better.
When Precision Medical Instruments switched from dot peen to laser marking on their surgical tool line, they eliminated a 3% rejection rate caused by inconsistent dot peen marks that failed UDI verification scans. The laser system cost four times more upfront but eliminated $80,000/year in scrap and rework.
