Engineering Cases
Engineering Cases focuses on real PCB engineering reviews, manufacturing challenges, and production optimization processes from actual fabrication projects. This category highlights how different PCB designs are evaluated and adjusted during engineering review, covering topics such as stack-up analysis, impedance control, drill optimization, copper balancing, solder mask alignment, DFM review, and production risk assessment across various PCB applications. The content in this section is based on practical manufacturing scenarios rather than theoretical introductions. Each engineering case demonstrates how specific PCB issues are identified, analyzed, and resolved during production preparation and fabrication. These records help engineers, purchasers, and hardware teams better understand the relationship between PCB design decisions and manufacturing stability, yield control, and process reliability. Topics may include multilayer PCB engineering review, HDI process optimization, flexible PCB manufacturing considerations, heavy copper processing adjustments, surface finish selection, Gerber data verification, and other real-world PCB production experiences. By organizing engineering challenges and process solutions into structured case content, this category provides valuable insight into practical PCB manufacturing and engineering workflow management.
Featured Blog
PCB Hole Attributes and Special Drilling: Common CAM Review Conflicts
See how CAM reads PCB hole attributes and special drilling—PTH vs NPTH, back drill, press-fit holes, countersink, and laser vias—and why incomplete data delays fabrication.
Latest Blogs
Optimizing Blind Vias and Stackup in a 6-Layer HDI Board
Explore a 6-layer 2-order HDI CAM review covering V-cut position verification, drill size discrepancies, and stackup optimization with 0.1 mm blind vias for reliable PCB manufacturing.
Optimizing Copper Weight, Via Filling and Panel Design in 4-Layer FPCs
Explore a 4-layer FPC CAM review covering 1 oz copper specifications, 0.3 mm via filling including via-in-pad, silkscreen pad clearance, and panelization for a large-format flexible circuit.
4-Layer FPC CAM Review: Stackup and Mask Opening Design
Explore a 4-layer FPC CAM review covering 0.2 mm stackup confirmation, impedance control, and full solder-mask openings for tight-pitch connector pads to improve manufacturing compatibility.
4-Layer FPC Stackup Design and FR4 Stiffener Adjustments
Explore a 4-layer FPC CAM review covering copper weight and impedance compatibility, factory stackup design, FR4 stiffener hole clearance adjustments, and bonding optimization for reliable manufacturing.
2-Layer Flexible PCB Stackup and Impedance Design Optimization
Explore a 2-layer FPC CAM review covering adhesiveless electrolytic copper, stackup optimization, 50-ohm impedance trace adjustment, via placement under stiffeners, and coverlay with local solder mask ink.
4-Layer FPC CAM Review: Stackup Design and Impedance Control
Explore a 4-layer FPC CAM review covering factory-matched stackup design for 100-ohm differential impedance, copper pour modifications, pad clearance, and solder bridging prevention.
CAM Review of a 4-Layer FPC: Fine-Line Manufacturing, PI Material Substitution, and Impedance Challenges
Explore a 4-layer FPC CAM review covering sub-0.05 mm fine lines, 0.18 mm BGA pads, PI material substitution, coverlay protection, and 100-ohm differential impedance challenges.
CAM Review of a 4-Layer FPC: Stiffener Adjustments, Gold Finger Thickness, and Surface Finish Optimization
4-Layer FPC Stack-Up Optimization and Impedance Adjustment for Adhesiveless Construction
CAM review of a 4-layer rolled-copper FPC where adhesive area was undefined, thickness requirements conflicted, and a shift from adhesive to adhesive-free material was proposed together with revised stiffener thickness and updated impedance trace geometries.
CAM Adjustments for Stackup, Connector Pad Copper Cutback, and Impedance Control on a Thin 4-Layer FPC Board
CAM review of a 0.23 mm 4-layer FPC board where the original stackup was rejected, connector pads inside copper pour required cutback to prevent SMT bridging, and impedance was set to 90 ohm differential and 50 ohm single-ended with ±10% tolerance.
CAM Review of Process-Edge Copper Balancing, Missing 50 Ohm Trace Width, and Stackup Conflict on an 8-Layer HDI Board with Blind Vias
CAM findings on an 8-layer HDI board requiring confirmation of process-edge copper for current balance, unspecified 50 ohm trace width, and a conventional stackup that cannot support the documented blind vias.
CAM Confirmation of Blind Via Processability, Impedance, and Stackup Adjustments for an 8-Layer HDI PCB
CAM review of an 8-layer 3-order HDI PCB requiring confirmation on blind vias over 0.1 mm beyond laser capability, via attributes, 50 ohm impedance referencing, optimized stackup, layer order, via merging, and pad additions for process clearance.
