What is New in IPC-7351C.pdf - 第9页
PC B L ibr ar i es Pr e s ents : Wh at is N ew i n IPC- 7351C Un d e r B o dy “L ” Gull W in g QFN D- Sh ap e PQFN D -Sh ap e Corn e r Co nca ve En d Cap Le ad Style s and R ound e d R e c t angl e P a ds Sh a rp Corner …
PCB Libraries Presents:
What is New in IPC-7351C
Ball Grid Array Bump Grid Array Land Grid Array
Column Grid Array
Pillar Grid Array
Flat Side
Convex Side Concave Side
Corner Concave
Gull Wing
J-Lead
Flat Lug
Outward L
Inward L
End Cap Under Body L
Flat Bottom
No-Lead
Surface Mount Component Lead Styles
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: