ENGINEERING ANSWER
Help improve a technical page by identifying a concrete discrepancy: a value, unit, test condition, equation, broken link or misleading interpretation. Send the page URL and a primary-source reference to 429214139@qq.com.
How this works
When comparing two data sheets, include their revision dates and the exact test conditions. A process measurement, design value and finished-board measurement may legitimately differ. We check the basis before replacing a published number.
Scope & transparency
The current release corrects the earlier site’s Tg/Td labeling and separates process Dk from design Dk. It removes unsupported universal frequency and finish recommendations in favor of construction-specific evaluation.