Pyralux® HXC black polyimide epoxy coverlay
DuPont™ Pyralux® HXC is DuPont™ Kapton® MBC black polyimide film coated with epoxy ideal for products where uniform matte black appearance is desired.
It is coated on one side with a proprietary B-staged modified epoxy adhesive. The Pyralux® HXC coverlay is used to encapsulate etched details in flexible and rigid-flex multilayer constructions for environmental and electrical insulation.
• UL-94 VTM-0 flammability rating
• High bond strength
• High thermal resistance
• Halogen free
• Enables high yields in processing
• Available in Kapton® MBC thicknesses of 10, 12, and 25 microns
• Available in coasted adhesive thicknesses of 10, 15, 20, 25, and 33 microns
Product Data Sheets (1)
Additional Information (1)
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INFORMATION & IDEAS
This process is used on double sided (Type 2) circuits where maximum flexibility is desired.
Even though flex circuits are very pliable and flexible, there are limits to their flexibility.
The purpose of the fillet is to prevent conductors from being cracked when the circuit is flexed during installation.
Preventing isolated stress conditions critical to ensure no premature falilure will occur in flexibile circuit
During soldering or assembly operations any stress to the conductor/pad interface can cause a fracture of the conductor.
Design options for covercoated pad hold down for single-sided and double-sided flex circuit applications