LED string lights chip packaging technology innovation: lighting up a new chapter of high-quality lighting
Publish Time: 2024-11-28
In the journey of LED string lights towards high-quality development, chip packaging technology has become a key driving force, and many innovative achievements have shone brightly, reshaping the lighting experience.Flip chip packaging is a highlight. The electrodes of traditional positive chips are located at the top, and the current needs to penetrate the epitaxial layer vertically, resulting in large resistance losses. The flip chip places the electrodes at the bottom, directly bonds to the substrate through metal bumps, and transmits the current horizontally, greatly reducing resistance and heat generation. This is of great significance in LED string lights. For example, long strings are used for holiday decorations. Low resistance ensures stable current, allowing each chip to emit light evenly, with consistent color and brightness, and good heat dissipation to extend service life. Even if it is lit for a long time, it is not easy to have local dark spots or light decay.Wafer-level packaging has also made significant innovations. In the past, packaging was mostly done by processing chips one by one, with limited efficiency and high cost. Wafer-level packaging operates directly on the entire wafer, integrating processes such as photolithography and thin film deposition, and completing chip passivation, electrode extraction and lens molding in batches. For the production of LED string lights, it not only greatly improves production capacity and reduces costs, but also can accurately control the shape and size of the lens and sculpt the light. For example, for the light string used to create a home atmosphere, the lens optimized by wafer-level packaging can accurately focus and soften the light to create a warm and glare-free light and shadow space.The innovation of phosphor conversion technology should not be underestimated. Traditional phosphor coating is prone to uneven distribution, which affects the color rendering and color temperature stability. Nowadays, remote phosphor technology is used to place the phosphor in a special structure far away from the chip, and the chip blue light excites the phosphor to produce a uniform mixed light. Applied to commercial display light strings, the color rendering index has jumped significantly, accurately restores the color of the product, and the color temperature is constant for long-term use, which meets the strict requirements of high-end scenes for light quality.These chip packaging innovations converge to give LED string lights low power consumption, high reliability, and excellent light quality characteristics. From festival decoration to daily lighting, it fully displays the charm of excellent lighting and illuminates the road to high-quality life.
