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
During soldering or assembly operations any stress to the conductor/pad interface can cause a fracture of the conductor.
Preventing isolated stress conditions critical to ensure no premature falilure will occur in flexibile circuit
Even though flex circuits are very pliable and flexible, there are limits to their flexibility.
This process is used on double sided (Type 2) circuits where maximum flexibility is desired.
The purpose of the fillet is to prevent conductors from being cracked when the circuit is flexed during installation.
Design options for covercoated pad hold down for single-sided and double-sided flex circuit applications