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
Tented Via vs Open Via Conflict Resolved in 2-Layer FR4 PCB
Explore how a tented via vs open via mismatch between system order and Gerber files triggered an Engineering Question during CAM review of a compact 2-layer FR-4 PCB. This engineering case details the solder mask ambiguity, risks to HASL processing and assembly, small-board marking challenges, fiducial placement, and the clarification process that ensured consistent via treatment and reliable production. Key lessons for accurate via solder mask documentation.
Undersized Panel Connection Tabs Risk Board Breakage in 2-Layer PCB
Discover how undersized panel connection tabs in a customer 3x4 panel triggered an Engineering Question during CAM review of a 2-layer FR-4 PCB. This case examines the risk of board breakage, file inconsistencies between single-board and panel data, via tenting mismatches, and the clarification process that added stamp holes and widened tabs for reliable depanelization. Key lessons for robust customer panelization design.
Tight Press Fit Hole Tolerance Triggers EQ in 2-Layer FR-4 PCB
Explore how tight press fit hole tolerance on holes larger than 2.0 mm halted production of a large 2-layer FR-4 PCB during CAM review. This engineering case details the data conflict, manufacturing risks, panelization issues including missing stamp holes and outline mismatch, and the clarification process that enabled reliable Class 3 production. Learn practical lessons for specifying achievable drill tolerance for press-fit applications.
Why NPTH Hole with Pad Conflict Required Clarification Before 6-Layer Production
Discover how a critical NPTH hole with pad conflict triggered an Engineering Question during CAM review of a compact 6-layer FR-4 PCB. This case study details the data mismatch between drill files and Gerber pads, manufacturing risks involved, and the clarification process that ensured reliable production. Learn key lessons for accurate NPTH vs PTH hole attribute definition to prevent similar issues.
PCB Stackup Adjustment for Reliable 6-Layer TG150 Production
Discover how we performed a successful PCB stackup adjustment to resolve lamination configuration deviation in a 6-layer FR-4 TG150 board. This engineering case details the capability evaluation, process optimization, and verification steps that ensured thickness uniformity, registration accuracy, and production reliability within IPC standards. Learn best practices for custom PCB stackup manufacturer adjustments.
3 oz Heavy Copper PCB Production Solving Slot and V Cut Design Issues
Learn how to resolve 3oz copper PCB design issues during CAM review. This guide covers slot tolerances, silkscreen placement, and V cut challenges for high volume thick copper manufacturing.
4 Layer FR4 PCB DFM Review for Breakaway Tabs and Silkscreen
This 4 layer FR4 PCB DFM review identifies risks in breakaway tab design and silkscreen placement. Improve production yield and assembly quality with these practical technical tips.
How to Fix 2 Layer FR4 PCB Design Errors During CAM Review
Real CAM engineering case on a 2-layer 1.6mm FR4 PCB where outline inconsistencies, close-pitch holes, PTH pad geometry, solder mask conflicts, and special features required EQ clarification. Learn practical DFM resolutions that prevented defects and ensured smooth production.
DFM Fixes for Non-Plated Slots, Gold Fingers & Trace Extensions in 4-Layer FR4 PCB
Real CAM engineering case on a 4-layer FR4 PCB where non-plated 0.5mm slots, external trace extensions, gold finger bevels, and panelization spacing required EQ clarification. Learn practical DFM adjustments that prevented routing defects, edge copper exposure, and assembly issues for reliable production.
How DFM Review Prevented Silkscreen and Tolerance Issues in 4-Layer FR4
In this 3000-piece 4-layer FR4 order, DFM analysis identified risks including insufficient silkscreen character height, slot hole tolerance requirements, and stackup alignment. Learn how proactive engineering confirmations and adjustments ensured clear markings, reliable dimensions, and successful high-volume production while avoiding legibility failures and process deviations.
DFM Review Prevented Stiffener and Hole Risks in Thin Flex PCB
For this ultra-thin 3-layer flex PCB with FR4 stiffener and EMI shielding, DFM analysis uncovered critical issues including stiffener overhang covering holes, PTH/NPTH definition mismatches, and material feasibility for 0.15mm thickness. Discover how preventive engineering adjustments ensured proper alignment, correct plating, and successful production, helping avoid assembly failures and reliability problems in flexible circuit designs.
Avoid 4 Layer FR4 PCB Silkscreen and Solder Mask Production Errors
Prevent 4 layer FR4 PCB production delays by fixing silkscreen and solder mask errors. This case study details how to align your design with factory limits for high quality manufacturing.
