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February 2010
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Injection Moulding Asia


Thinnest LED
Japanese moulder Nissei Industries has produced what is says is the industry’s thinnest low-profile side view light-emitting diode (LED) for use on thin profile mobile phones.

The 0.4 mm high LED is made of Amodel A-4422 LS WH118 polyphthalamide (PPA) resin from Solvay Advanced Polymers and sets a new mark for side view LEDs, which until now have been limited to 0.5 mm to 0.8 mm in size.

The mineral-filled Amodel grade is able to fill very thin walls and is able to run in high-cavity tools (up to 264 cavities). The thinwall LED reflector cup made of Amodel PPA is injection moulded onto the lead frame.

Besides its high flow, the materials has a fast crystallisation rate and offers reduced cycle times and lower flash, compared to using glass-filled nylon 9T products. The material’s high strength and stiffness prevents warpage and permits the use of mineral filler for higher opacity than glass-filled products, says Solvay.

The resin also has a heat distortion temperature greater than 300°C, which allows for IR reflow capability up to 270°C. The light-stabilised grade retains its whiteness and provides a light reflection greater than 90% from 420 nanometers to 700 nanometers. It easily adheres to soft and hard silicone encapsulants and the lead frame so no air or moisture can penetrate the package and affect chip performance.

Nissei Industries, based in Tokyo, supplies the Amodel LED reflector cups to a Taiwanese packaging company that produces LEDs for the mobile phone industry.

 
 
 
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