FPC layout 经典讲义.pdf

FPC layout 经典讲义FPC vs. Coaxial (Case Study)

VS

份 ‰ “dq KEL Taiwan Co., Ltd. Sales & Marketing M. Kobayashi (2004,Dec.10th)

General Terms (FPC & Coaxial)
1. FPC Flexible Printed Circuit Coaxial FFC Flexible Flat Cable

2. 3.

1. FPC

2 S

S

G

+

-

G

+

-

G

G

FPC Features
1. Ground ¨ Always at the Cable Edge Side

Difficult to Design PCB layout

2.

Ground ¨

As many as possible

Too Many Ground Signal Difficult to Design PCB layout

FPC Features
3. Ground ¨ Always Ground Plane/Pad Require per signal pair Without this, intensively difficult to Adjust Impedance Signal Reflection occurs easily = EMI Noise 4. Signal ¨ Always between Ground

Difficult to Design PCB layout (e.g.) Layout ¨ G+-G+-G+-G

FPC Features
5. Cable Flatted & Restriction Do Not Bend & Fold when Allocating Difficult on