Gap fillers provide thermal relief

Chomerics has two form-in-place thermal gap filler materials that provide a highly conformable path between hot components and heat spreaders.

Chomerics has two form-in-place thermal gap filler materials that provide a highly conformable path between hot components and heat spreaders.

Therm-A-Gap T630 and T630G are designed to be dispensed directly from either a syringe or a tube without premixing or curing.

The unique viscoelastic materials achieve 50% deflection with only 1lb/in2 of applied pressure; this enables them to effectively fill gaps caused by loose or varying assembly tolerances without risk of damage to components.

Therm-A-Gap T630 and T630G offer an economical alternative to less conformable elastomeric gap filling pads that, in certain applications, over-stress solder joints and leads resulting in potential component failure.

Both Therm-A-Gap T630 and T630G have a thermal conductivity of 0.7W/m-K and are able to fill gaps that range from 0.25 to over 7.60mm.

Therm-A-Gap T630G differs from T630 in that it has an additional filler of 0.25mm diameter glass beads that act to provide a compression stop - an essential feature in applications requiring electrical isolation in addition to thermal transfer.

Both materials are extremely stable and have very low levels of extractable silicone; this helps them to meet the requirements of the Telcordia specification (GR78-CORE) for telecommunications equipment.

They are also rated to UL94V0 for flammability resistance.

The application of Therm-A-Gap T630 and T630G can be carried out either manually or by an automated process making the material suitable for use in small, medium, and large volume designs.

Typical applications include network and graphics boards, power supplies and automotive electronics modules.

The easy application method of the material, coupled to the fact that it requires no mixing or curing also makes it ideal for rework and field repair applications.

Both materials have a shelf life of 18 months and do not need to be stored in a refrigerated environment.

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