Pyralux® LF-B provides a uniform, aesthetically pleasing appearance to flexible printed circuit materials
DuPont™ Pyralux® LF-B is DuPont™ Kapton® B black polyimide film coated with acrylic ideal for products here uniform matte black appearance is desired.
The coverlay is made with the leading DuPont™ Kapton® brand black polyimide film for high performance applications where matte-black material enhances design aesthetics. It is coated on one side with a proprietary B-staged modified acrylic adhesive. It is used in mobile devices, computers, military electronics, and 3-D lighting systems for automotive applications including daytime running lights (DRL), turn lights, high/low beam and rear lights, where aesthetically pleasing design and reliable high performance are imperative.
• Color stable matte black surface
• Crease and scratch resistance
• Flexible to enable 3D LEDs for curved light designs
• Proven reliability adhesive system
• Maintains appearance through high temperature cycles
• Available in DuPont™ Kapton® B thicknesses of 0.5, 1.0, 2.0 mils; 3.0 and 5.0 are available upon special request
• Available in coated adhesive thicknesses of 0.5, 1.0, 2.0 mils
Pyralux® LF-B is used in conjunction with Pyralux® LF copper-clad laminate for automotive applications.
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INFORMATION & IDEAS
DESIGN TIP: Need for Anchoring Spurs and Pad Fillets
During soldering or assembly operations any stress to the conductor/pad interface can cause a fracture of the conductor.
DESIGN TIP: Balanced Circuit Pattern Reduces Premature Failure
Preventing isolated stress conditions critical to ensure no premature falilure will occur in flexibile circuit
DESIGN TIP: Minimum Bend Radius for Flex Circuits
Even though flex circuits are very pliable and flexible, there are limits to their flexibility.
DESIGN TIP: Pad Only Plating
This process is used on double sided (Type 2) circuits where maximum flexibility is desired.
DESIGN TIP: Epoxy Resin Fillets
The purpose of the fillet is to prevent conductors from being cracked when the circuit is flexed during installation.
DESIGN TIP: Pad Hold Down Options
Design options for covercoated pad hold down for single-sided and double-sided flex circuit applications