6

sFH28 Series FPC Construction (Recommended Specifications)

1. Using Single-sided FPC

1. This specification is a recommendation for the construction of the FH28 Series FPC and FFC (t=0.3 ± 0.05).

2. For details about the construction, please contact the FPC/FFC manufacturers.

3. Using FFC

4. Precautions

FPC : Flexible Printed Circuit

Material Name

Surface treatment

Copper foil

Base adhesive

Base film

Reinforcement material adhesive

Stiffener

Material

Thickness (µm)

Cu

1oz

Polyimide

1 mil thick

Thermosetting adhesive

Polyimide

3 mil thick

Total

Covering film layer.

Cover adhesive

Polyimide

1 mil thick.

3

35

25

25

30

175

293

25

25

FFC : Flexible Flat Cable

Adhesive

Polyester

Adhesive

Stiffener

Polyester film

Adhesive

Polyester

Polyester

Polyester

Total

Thermoplastic polyester

12

30

35

30

12

30

188

295

Material Name

Material

Thickness (µm)

Connecting side

Back side

Connecting side

Back side

0.2µm thick gold plated over 1 to 5µm

thick nickel underplating

Copper foil

Cover adhesive

Covering layer film

Reinforcement material adhesive

Stiffener

2. Using Double-sided FPC

FPC : Flexible Printed Circuit

Covering layer film

Cover adhesive

Surface treatment

Through-hole copper

Copper foil

Base adhesive

Base film

Base adhesive

Cu

1/2oz

Polyimide

1 mil thick

Thermosetting adhesive

Polyimide

1 mil thick

Total

18

25

25

50

100

297

Polyimide

1 mil thick

Cu

Cu

1/2oz

Polyimide

1 mil thick

3

15

18

18

25

18

Material Name

Material

Thickness (µm)

* To prevent release of the lock due to FPC bending, use of the FPC with copper foil on the back side is NOT RECOMMENDED.

Connecting side

Back side

0.2µm thick gold plated over 1 to 5µm

thick nickel underplating

Gold plated annealed copper foil

The product information in this catalog is for reference only. Please request the Engineering Drawing for the most current and accurate design information.