English Top>News Releases>2001>SDK Develops New Extruded Aluminum Heat Sinks

News Releases

SDK Develops New Extruded Aluminum Heat Sinks

December 10, 2001

Showa Denko K.K. (SDK) has developed two new types of extruded aluminum-fin heat sinks, featured respectively by thin walls and high aspect ratios, for use in PCs and industrial machinery.

Aluminum-fin heat sinks already on the market are made by various methods, including forging, mechanical fitting and brazing. SDK has developed compact and high-performance aluminum-fin heat sinks by the extrusion method to meet the market needs. The development is based on SDK's expertise in analyzing stress on extrusion die and improvement in extrusion process.

The newly developed heat sinks have the following advantages:

1.Thin-wall type (Fin height: 25 mm or less)

Applications For PCs and computer servers that require compactness
Features The thickness of fins has been reduced from 1.0 mm to 0.4 mm. As a result, the weight and volume of a heat sink unit have been reduced by approx. 30% and 20%, respectively, compared with conventional heat sinks provided by SDK. The cooling performance and airflow resistance have been improved by approx. 10% each. This will enable a reduction in fan power.

2.High-aspect-ratio type (Fin height: more than 25 mm)

Applications For industrial machinery and computers for cellular-phone base stations
Features The aspect ratio (the ratio of fin height to fin pitch) has been increased from conventional 10 (fin height: approx. 30 mm) to 18 maximum (fin height: approx. 55 mm), resulting in higher cooling performance.

SDK will also sell these products to customers in the electronics and automotive industries, aiming to achieve sales of ¥1 billion in three years' time. Under the medium-term consolidated business plan, SDK is focusing on its high-value-added aluminum fabricated products operation as one of its strategic business areas with high growth potential.