Stress-Free Singulation for High-Reliability Microelectronics Assembly

The Customer

A specialized EMS provider focusing on high-reliability electronics. Their service portfolio includes design support, advanced packaging, PCB assembly, and micromachining for customers developing medical devices, aerospace electronics, and AI accelerators. 
Business model: high-mix, low-volume production with stringent quality requirements.

The Challenge

Customer applications demanded flex circuit and rigid-flex assemblies using polyimide, LCP, FR4, and overmolded plastics. Each market imposed strict specifications:

Medical implantables: Zero-defect singulation where micro-cracks would compromise device reliability inside the human body
Space systems: Stress-free cutting at rigid-to-flex transition zones where mechanical damage would create failure risks in difficult environments and repair is impossible
AI hardware: Minimal dead space between components to reduce material costs while maintaining precision for heterogeneous integration and chip-on-flex assemblies

Mechanical depaneling - routing, punching, die cutting - introducea substrate stress, micro-cracking, and delamination that conflicts with ISO 13485, ITAR, and IPC Class 3 standards. Outsourcing laser services extend lead times and complicate process control documentation.

The Solution: LPKF CuttingMaster 2127
 

Key capabilities:

•    Material flexibility without tooling changes: polyimide, LCP, rigid-flex, FR4, overmolded plastics
•    UV laser spot size ~20 µm for tight tolerances and complex geometries
•    CircuitPro software enables fast programming and material switching
•    Non-contact process preserves solder joint integrity and substrate quality

Business results:

The LPKF laser depaneling system processes multiple materials daily and quickly became the facility's busiest production tool. Engineers now design panels with up to 30% tighter layouts, directly reducing material costs in every production run. In-house laser depaneling eliminated outsourcing dependencies, accelerated prototype-to-production cycles, and provided the process control required for high-reliability compliance standards.

The ROI exceeded initial projections through material savings, throughput improvements, and the ability to win new business in applications where mechanical depaneling methods cannot meet specifications.

Download the complete case study for detailed customer information and the whole use case.

Ready to eliminate micro-cracks in your high-reliability assemblies?