PCB制程设计PCBA制程改善 DFM,DFT, Process, PCBA processenppt.ppt

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PCBA Presentation
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Content Structure
1, DFM/DFT Introduction
2,PCB Process and Material
3, PCBA Process and SAC305
4, ICT Testing
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1, DFM/DFT Introduction
, Why we need to do DFx (DFM/DFT) analysis for PCB checking before we finalize the Gerber files?
First, the PCBs or PCBAs we design should match with PCB or PCBA supplier capability.
This is HAT PCB Panelization
Due to limited G PCB capabilities, 5mm clearance are required. But L PCB supplier can accept 2mm.
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Second, find some potential issues, In order to sure to avoid problems for PCB or product assembly.
A,Small issue: no UL logo and PCB supplier information on the PCB. Actually, these words were printed under heatsink.
D,Critical issue: ponent can’t be located in the center of ic Core. It affects PCBA assembly. We’re thinking of some methods to fix it.
B,Balanced trace can prevent tombstone issue.
C, Thermal relief for PTH (Plated Through Hole) components insufficient solder issue.
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Draw a conclusion:
It’s necessary to do DFx analysis before Gerber out. The value of DFx in PCBA design and manufacturing can be factored directly into the cost to produce a printed circuit board or assembly. If the PCB/PCBA is manufactured with defects, the manufacturers or LEM will have to bear the high cost for defects and repairs. The only way those defects can be identified is by tests or assembly.
, DFx Benefits
Improved design
Decrease the time-to-market
Decrease product cost
Increase market share and profitability
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,How to implement DFx process
Flex receive data
Flex run DFx
R&D release Gerber files
Meet DFx
Guideline
Confirm DFx issue
Draw a conclusion
DFx Review
Arbitrate for Non-conform issue
Yes
No
LXX
Gerber out
Meet DFx
Guideline
Yes
*1 Closed
No
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,DFM/DFT check Item
DFM check Item including:
Tooling hole
Mounting hole
Fiducial marks
PTH, NPTH size
Solder side ponent cle