Blog
PCB Z-Axis CTE: Tg, Expansion and Via Reliability Checks
Read PCB Z-axis CTE correctly, compare Tg and expansion data, and use a practical checklist for laminate selection, via qualification and supplier review.
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PCB Glass Weave Effect: Skew, Routing and Stackup Checks
Understand PCB glass weave skew, compare spread glass with angled routing, and use a stackup checklist to confirm material construction before fabrication.
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PCB Copper Roughness: Foil Types, Loss and Stackup Checks
Compare PCB copper foil options, read RO4350B LoPro parameters, and use a practical roughness and loss checklist before approving your RF stackup.
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PCB Ionic Contamination Testing: ROSE vs IC and SIR
Compare ROSE, ion chromatography and SIR for PCB cleanliness. Check sample area, equipment fit and report evidence before accepting a production lot.
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Conformal Coating Masking: Keep-Outs, Materials and Removal Checks
Plan PCB coating keep-outs, compare tape vs boots vs peelable masks, check Chemask HV data, and use a practical masking-removal inspection checklist.
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PCB Potting Bubbles: Causes, Vacuum Degassing and Checks
Find why PCB potting bubbles form, compare degassing with vacuum potting, and use a resin-parameter example and trial checklist before production.
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Press Fit PCB Holes: Finished Sizes, Plating and Assembly Checks
Specify press-fit PCB holes using connector drawings, finished-hole tolerances and plating checks. Use a release checklist before assembly.
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PCB Mouse Bites: Tab Placement, Edge Finish and Removal Checks
Review PCB mouse bites before ordering: distinguish tabs from hole spacing, protect critical edges, and use a drawing checklist for controlled separation.
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Via Tenting: Mask Coverage, Open Vias and Fabrication Checks
Choose tented or open vias, check front and back solder mask, and distinguish tenting from filled via-in-pad before releasing PCB fabrication files.
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Solder Paste Storage: Shelf Life, Warm-Up and Dry Paste Checks
Separate solder paste shelf life from stencil life, handle warm-up correctly, and diagnose dry paste with a lot log and practical stop-use checklist.