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First-article preparation
Lock programs, stencil, materials, process parameters, inspection criteria and revision.
Input · Controlled dataOutput · FAI plan
TECHNICAL NOTE
Why BGA and QFN Require X-Ray Inspection at GUANWEIER, a one-stop PCBA and EMS manufacturing partner in Fuhai, Bao'an, Shenzhen.

ENGINEERING KNOWLEDGE
Organized around inputs, engineering decisions and deliverables without repeating the site-wide manufacturing flow.
Lock programs, stencil, materials, process parameters, inspection criteria and revision.
Verify polarity, joints and critical dimensions with SPI, AOI, X-Ray and functional test as required.
Record exceptions, re-verification and release conclusions before the next lot.