Creative Materials has developed a line of
products that are customized for LED lighting
applications, now including 125-35C, Syringe-
Dispensable Thermally Conductive Epoxy Adhesive.
Formulated for use in the manufacture of LEDs, these
products are highly effective as an interface between a
heat-producing component and a heat-sink.
Application to LEDs
The expanding industry of high power light emitting
diodes (LEDs) provides a good example of the need for effective heat management. Heat
removal in LEDs has become a crucial area of R&D, since LEDs are rapidly replacing more
traditional lighting methods. The heat generated by LEDs must be removed to ensure optimal
performance. In order to extend the life of an LED device and reduce operating cost, the
functional temperature must be kept below 120°C.
Heat Removal
One heat-removal technique is to attach a heat-sink, artificially increasing the surface area of the
component to allow heat to dissipate. The heat-sink is usually composed of a highly thermally
conductive material (e.g., a metal), so the heat can be transferred away from the component.
To facilitate heat transfer, the gap between the component and heat-sink must be eliminated.
The use of a thermal adhesive can significantly improve the thermal interface between the two
substrates.
Creative Materials' New Thermal Management Product: 125-35C
Creative Materials has introduced a new product to our family of thermally conductive
adhesives: 125-35C. The properties of this product are ideal for thermal management
applications where precision is required in small area bonding, e.g. for bonding individual LEDs.
This product is syringe-dispensable, 100-percent solids, electrically insulating and precatalyzed,
featuring outstanding chemical resistance and high-temperature properties. Its thermal
conductivity is >5.5 W/mK. The product cures at temperatures as low as 80°C and has a
temperature range of up to 230°C. The product is flexible and stress-absorbing when bonding to
mismatched substrates. Among the features of this one-component product is ease of use and
minimal shrinkage during curing.
The company's highly regarded 109-12 remains one of the best-selling products, offering many of the same
characteristics as 125-35C and a proven track record in LED lighting applications. This product
is extremely versatile in applications where large-area bond lines are needed, offering high
thermal conductivity and superior performance. It also features low viscosity, which reduces the
amount of air entrapment in the component interface, allowing a minimal amount of product to
be applied and keeping thermal resistance low. With thermal conductivity of 5.65 W/mK and
operating temperature of up to 220°C, 109-12 is a low-stress epoxy, featuring exceptional
resistance to thermal-cycling. In applications where solder replacement is required, the
compliant nature of 109-12 avoids the brittle failure of solder.
Other products in the same family are 108-50 and 111-17, both medium-viscosity products. All
products in this family exhibit similar performance characteristics and can be used in a range of
applications. Applications include die attachment, printed circuit board fabrication, advanced
material composites, LED attachment, and heat-sink bonding.
About Creative Materials, Inc.
Creative Materials, Inc., is one of the leading manufacturer of electrically conductive inks, coatings, and
adhesives. Products from Creative Materials are used in electronic components for computers,
keyboards, cell phones, solar collectors, automobiles and aircraft, for medical electrodes,
medical instruments, and heating equipment. Creative Materials is ISO 9001 certified, with an
extensive product line that includes more than 1,000 products. The company is renowned for
creating custom formulations that are used in a wide variety of global applications, providing
cost-effective design solutions for demanding production requirements. With over 80 years of
experience in the adhesives, ink and coating industry, our staff combines technical expertise
with nimble production capabilities, enabling us to reduce time-to-market for new product
applications.
Source: Creative Materials, Inc.
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