Reliability & testing
Ask for evidence that represents the production stackup and its thermal history.
HDI PCB qualification plans: make test coupons represent the actual via structure
Map production HDI interconnect sequences to coupon nets, lot identities and test reports with an explicit coverage and change-review worksheet.
Reliability & testingThermal cycling and HDI interconnects
Thermal expansion mismatches can stress microvia interfaces and internal connections. Qualification should represent the manufacturing and service exposures that matter for the product.
Reliability & testingMicrosection inspection of HDI boards
A microsection reveals a local view of layers, holes and interfaces. It is useful evidence, but sampling and section position limit what it can prove.
Reliability & testingElectrical testing for HDI PCB
Bare-board electrical testing checks connectivity and isolation against the intended netlist. Its scope differs from impedance testing and thermal reliability testing.
Reliability & testingTest coupons that represent the board
A coupon should reproduce the relevant materials, geometry and process history of the production structure being evaluated.
Reliability & testingWarpage and dimensional stability in HDI
Thin dielectrics, asymmetric copper and repeated thermal processing can make dimensional control a significant HDI concern.
Reliability & testingPCB Troubleshooting-Ultimate Guide On Purpose And Problems Goal
PCB Troubleshooting-Ultimate Guide On Purpose And Problems Goal: reference information, design-review checkpoints and related reliability & testing resources.
Reliability & testingCommon PCB PCBA Testing Techniques
Common PCB PCBA Testing Techniques: reference information, design-review checkpoints and related reliability & testing resources.
Reliability & testingUnderstanding Manufacturing Tolerances on a PCB – Track Width and Isolation Gap Tolerances
Understanding Manufacturing Tolerances on a PCB – Track Width and Isolation Gap Tolerances: reference information, design-review checkpoints and related reliability & testing resources.
Reliability & testingWhat is the typical tolerance for PCB?
What is the typical tolerance for PCB: reference information, design-review checkpoints and related reliability & testing resources.
Reliability & testingUnderstanding Manufacturing Tolerances on a PCB
Understanding Manufacturing Tolerances on a PCB: reference information, design-review checkpoints and related reliability & testing resources.
Reliability & testingHow to Use an Ultrasonic Cleaner to Restore Electronics and PCBs
How to Use an Ultrasonic Cleaner to Restore Electronics and PCBs: reference information, design-review checkpoints and related reliability & testing resources.
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Bring the requirements.
Start the right conversation.
Share your layer count, via structure, material and quantity. Give the fabrication review a clear starting point.