What is New in IPC-7351C.pdf - 第10页
PC B L ibr ar i es Pr e s ents : Wh at is N ew i n IPC- 7351C • Ball G rid A rr a y • C o lumn Grid Arr a y • Lan d Grid Arr a y • D u al Flat No-lead • T hermal P ads L ead Styles E x empt fr o m R ounded R ec t angle P…
PCB Libraries Presents:
What is New in IPC-7351C
Under Body “L”
Gull Wing
QFN D-Shape
PQFN D-Shape Corner Concave
End Cap
Lead Styles and Rounded Rectangle Pads
Sharp Corner pads are not good for RF design
PCB Libraries Presents:
What is New in IPC-7351C
• Ball Grid Array
• Column Grid Array
• Land Grid Array
• Dual Flat No-lead
• Thermal Pads
Lead Styles Exempt from Rounded Rectangle Pads
Under Body Terminal Leads where a
Periphery Pad is required:
PCB Libraries Presents:
What is New in IPC-7351C
• Silkscreen Outline and Polarity Marking
• Assembly Outline and Polarity Marking
• Courtyard Outline
• Land Pattern Origin Marker
• Component Outline
• Terminal Lead Outline
Guidelines for Drafting Items