Flexible circuit on reflective substrate

Abstract

The present disclosure describes materials and methods for creating electrical circuits on a non-conductive multilayer reflector substrate that can withstand reflow temperatures with low temperature solder pastes without creating distortions in the reflective substrate. The materials and methods include the use of a novel reflective mirror film based on silicone polyoxamide polymers or copolymers, which can retain reflectivity at these temperatures without damage to reflection or other film properties.

Description

Background technique [0001] In many lighting applications, it is desirable to combine LEDs with reflective surfaces in order to produce highly efficient light sources. While a typical circuit board with mounted LEDs may be coated with a reflective material such as white ink, epoxy, or paint, these surfaces typically only have reflectance values ​​in the range of 70% to 90%. Furthermore, these types of surfaces are often diffusely reflective, and scattering light can actually reduce efficiency in some lighting systems. A specularly reflective surface, such as metal, can help direct reflected light in complementary directions, thereby increasing efficiency. However, applying a reflective metal coating to the surface of a circuit board can be problematic because the metal can short circuit board conductors. Contents of the invention [0002] The present disclosure describes materials and methods for creating circuits on non-conductive multilayer reflector substrates that can ...

AI Technical Summary

Problems solved by technology

However, applying a reflective metal coating to the surface of a circuit board can be problematic because the metal can short circuit board conductors

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